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As China prepares to celebrate its New Year on January 22, there are fears the authorities may use the cover of Covid, along with rapid advances in surveillance technology, to further crackdown on Christians.
The NYPD announces an aggressive new crackdown on dirt bikes and ATVs in the city, a campaign that will include publicly destroying the vehicles on TV. Criminal justice reporter Dean Meminger has the details.
EXO, TCS Tough, Apex, Super Ground, Grid Trail \\u2013 navigating the world of mountain bike tyre carcasses can be a minefield of acronyms and brand-specific designs, but understanding what\\u2019s at the heart of a tyre can make a significant difference to your ride.\\nIn fact, choosing the best mountain bike tyres for your bike, style and terrain can make or break your ride. You\\u2019ll often hear us say tyres are one of the most important upgrades you can make to your mountain bike.\\nWhile there\\u2019s a lot to consider when eyeing up a fresh set of boots for a mountain bike, including compound, width and tread pattern, the carcass \\u2013 also called the casing \\u2013 is at the core of any bicycle tyre.\\nSelecting the right tyre for your needs can seem like a confusing web of jargon and brand bluster \\u2013 and, truth be told, even the most experienced riders can still become lost in the naming conventions and technical specifications of any range of tyres.\\n\\n The type of riding you do will dictate what type of tyre carcass you need. Ian Linton \\/ Immediate Media\\nBut fear not, BikeRadar is here to help.\\nWhile every brand will have its own jargon, the same construction principles apply. Get to grips with the way tyre carcasses are constructed \\u2013 and what that means for your ride \\u2013 and you\\u2019ll soon understand how to choose the best tyres for your riding.\\nThere\\u2019s a lot to cover here, so use the links below to skip to the section you need, or read on for every detail.\\nDissecting a mountain bike tyre\\nWhy does carcass construction matter\\nWhat types of tyre carcass are there\\nWhat carcass type do you need for your riding style\\nWhat else is there to consider\\nDissecting a mountain bike tyre\\n\\n The construction of a typical mountain bike tyre will look like this. Maxxis\\nLet\\u2019s start with an overview of how a typical mountain bike tyre is constructed, as well as the common terminology.\\nA mountain bike tyre is made up of many layers, but most tyres from the majority of manufacturers are designed in a similar way. The above image from Maxxis shows a regular mountain bike tyre\\u2019s construction with its composite parts:\\nBead: A wire or rubber section that hooks onto the rim, keeping the tyre attached to the rim and creating an air-tight seal.\\nCarcass (often referred to as the \\u2018casing\\u2019): This part is what this article is all about. A casing can be thick or thin with a low or high TPI (we\\u2019ll come on to this). The casing can wrap around itself once or multiple times, and wraps around the tyre\\u2019s bead.\\nTread: Defining the type of terrain or riding style the tyre is most suited to, the tread pattern of different tyres can vary greatly, but its form isn\\u2019t generally influenced by the casing.\\nPuncture protection: A rubberised insert used within the tyre\\u2019s construction to provide protection against tears or pinch flats. Increased puncture protection adds weight.\\nSidewall: The rubberised exterior of the tyre that gives it shape. The sidewall is usually where some of the puncture protection portion is located (for example Maxxis\\u2019 EXO or DoubleDown inserts).\\nWhy does carcass type matter\\nA tyre\\u2019s carcass can have a significant influence on how your bike rides, according to Aaron Chamberlain from Maxxis.\\nA tyre with a thicker casing creates a \\u201cmore damped ride, which is typically desirable\\u2026 [when] you\\u2019re smashing into rocks and roots at high speeds and subjecting the tyres to high cornering forces,\\u201d he says.\\nHeavy-duty models might be great for stability in turns and for damping vibrations and bumps, and can often be run at lower pressures, but they\\u2019ll weigh more and create more rolling resistance (drag).\\nOn the other hand, a thin, lightweight carcass can improve acceleration, deform around smaller, sharper bumps more readily and roll fast \\u2013 but it might be more prone to punctures, or tear more easily, and sometimes require higher pressures.\\n\\n Tyre carcass construction can have an impact on how your bike rides. Andy Lloyd \\/ Immediate Media\\nAccording to Schwalbe\\u2019s Tim Ward, lighter, thinner carcasses can also \\u201creduce trail buzz and, in turn, rider fatigue, allowing the rider to put all their energy into [riding].\\u201d\\nTyre carcasses that sit between these two extremes are designed to balance the damping and stability of weighty tyres with the compliance and deformation of lighter ones.\\nThis, according to Ward, \\u201cenhances the rolling characteristics and trail feedback\\u201d while offering \\u201cincreased lateral support and stability in hard cornering.\\u201d\\nAlthough tyre carcasses aren\\u2019t a silver-bullet solution for improving or changing the way your bike rides, they can have a significant effect, and choosing the right tyre for your needs is crucial.\\nWith that in mind, let\\u2019s get stuck into the different types of mountain bike tyre casing construction.\\nWhat types of mountain bike tyre carcass are there\\n\\n Confused by what all this means We\\u2019re here to help. Steve Behr \\/ Immediate Media\\nIn this article, we will focus on mountain bike-specific carcasses, where there are typically more options available from the major brands.\\nGravel tyres, road bike tyres and general-use bicycle tyres use the same principles of construction, but have different objectives (eg, low cost or all-out rolling performance) and there are fewer carcass types to choose from.\\n\\n \\nWhat is tyre carcass TPI\\nA mountain bike tyre carcass consists of layers, starting with and always including a rubberised threaded material that forms the basis of all tyres \\u2013 each layer that makes up the construction of the carcass is referred to as a \\u2018ply\\u2019 in tyre jargon.\\nA tyre\\u2019s carcass material is made from threads of varying thickness and quantity, usually 60 or 120 threads per inch (TPI), that are coated with rubber.\\nA lower TPI means thicker, stiffer, heavier threads, thus fewer per square inch. A higher TPI means thinner threads that will create a lighter, more flexible tyre with thinner sidewalls.\\nThe thicker the threads, the more rubber is needed to fill the larger spaces between each one, as they can\\u2019t be woven as tightly.\\nAs a result, carcass construction can affect the weight, rolling resistance, damping, reliability and grip of a tyre.\\nMany mountain bike tyres use a single-ply or dual-ply 60 TPI casing material to create a well-supported, resilient tyre; others might use only a single layer (or \\u2018single ply\\u2019) of 120 TPI material for lighter weight and increased flexibility, which helps reduce rolling resistance on rough ground.\\nPuncture-resistant inserts or sidewall inserts aimed at providing extra support and stability may also be added as additional layers within a casing, but these vary from brand to brand.\\n\\n\\n \\n Selecting the right tyre carcass is often about the riding discipline.\\nDownhill and cross-country riding, for example, place different demands on tyres: stable and sturdy for downhill bikes, light and fast-rolling for cross-country bikes.\\nIt can also come down to the rider (heavier or more aggressive riders might favour stability over rolling resistance) and the terrain (an XC racer might not necessarily choose the lightest, fastest-rolling tyre if the terrain is rocky and likely to damage the tyre sidewall).\\nGenerally speaking, there are four types of carcass construction, each outlined below.\\nThe devil really is in the detail, though, as some tyre brands offer casings with the same name but in two different constructions (for example, 60 TPI and 120 TPI), which will have an impact on the tyre\\u2019s performance and intended use.\\nSingle-ply, high-TPI carcass\\n\\n The EXO casing from Maxxis is an example of a single-ply carcass designed for low weight and fast-rolling speed, with some protection against punctures. David Arthur \\/ Immediate Media\\nA 120 TPI single-ply tyre favours speed over durability.\\nThe thinnest mountain bike tyre casings are built for XC-style riding and racing. The key objectives are low weight, fast acceleration and minimal rolling resistance, but they must also be able to cope with the varied terrain of modern XC courses without tearing or puncturing.\\nTyres with a lightweight casing generally have a low-profile, fast-rolling tread pattern and are usually 2.4in and narrower in width.\\nThe high thread count means less material overall, resulting in a lower overall tyre weight, which is vital for all-out acceleration, as we found when we tested the fastest tyre size for mountain biking.\\nSingle-ply, low-TPI carcass\\n\\n The EXO+ casing from Maxxis combines a single-ply, medium-TPI casing with a puncture protection layer. Ian Linton \\/ Immediate Media\\nMost mountain bike tyres for everyday riding use a single-ply 60 TPI casing.\\nThis will be slightly heavier than a high-TPI, single-ply tyre, but the thicker threads mean it should be stronger and sturdier without being overly heavy.\\nThese characteristics make single-ply 60 TPI tyres common for everything from cross-country to trail, and downcountry to enduro.\\nManufacturers often combine a single 60 TPI layer with a sidewall insert (Maxxis\\u2019 EXO and EXO+ or Schwalbe\\u2019s Apex, for example) for added structural support and resistance to sidewall cuts and pinch punctures. Companies also regularly include a puncture protection layer (or an optional one) in these single-ply tyres.\\n\\u201cThe majority of our TCS Light [single-ply] mountain tyres feature SG2 technology, which provides a protective nylon insert spanning from bead-to-bead, to provide extra puncture protection without the weight of a dual-ply casing,\\u201d says James Heaton from WTB.\\nDual-ply, high-TPI carcass\\n\\n Vittoria\\u2019s Enduro is a dual-ply, high-TPI carcass. Alex Evans\\nSome manufacturers offer dual-ply, 120 TPI tyres aimed mainly at aggressive trail riding or enduro racing.\\nThe idea here is to provide support in the turns and against big hits, yet keep things fast and relatively lightweight (compared to a dual-ply, lower-TPI option).\\nMaxxis\\u2019 DoubleDown, Schwalbe\\u2019s Super Gravity and Vittoria\\u2019s Enduro casings are examples of dual-ply, high-TPI carcasses.\\nDual-ply, low-TPI carcass\\n\\n DH casing tyres are tough and puncture-resistant. Steve Behr\\nFor gravity-fed riding, including bike park laps and downhill racing, you need a really sturdy tyre that can withstand the massive forces of ripping around banked turns and hitting rock gardens flat-out.\\nTyres in this category normally use a dual-ply, 60 TPI casing and sometimes include a sidewall insert for increased strength.\\nThe heavy-duty construction and increased volume of rubber means these beefy tyres are also better at damping out trail vibrations \\u2013 they\\u2019ll bounce less over bumps and give a more planted ride.\\nTwo layers of 60 TPI material is regarded as sufficient for slamming corners and smashing into rocks, while remaining manageable in terms of weight for gravity riding, where the focus is ultimately on going downhill, not climbing.\\nThese tyres still add significant weight over other options, however, and are usually paired with a softer-compound rubber for the tread.\\nAs a result, they roll significantly slower, but this isn\\u2019t a big problem when you are pointing straight down a hill.\\n\\n \\nUnderstanding layers and plies\\nWhen a tyre carcass is put together, each ply is folded around the tyre bead (the structural part that sits against the wheel\\u2019s rim) and back over itself. This stacking up usually means one ply becomes three layers in the middle of the tyre.\\nMost manufacturers list the number of plies (one or two), not the number of individual layers. However, some (including Schwalbe) list the number of carcass layers once each ply is folded, so it\\u2019s worth reading each brand\\u2019s casing information to fully understand the different approaches to ply and layer naming.\\n\\n\\n \\n What tyre carcass do you need for your riding style\\nTyre manufacturers produce options for each of mountain biking\\u2019s disciplines, so whether you ride cross-country, downhill or any of the categories in-between (yes, downcountry, we\\u2019re looking at you) someone has you covered.\\nNot every brand makes tyres suitable for every type of riding \\u2013 all-out racing (whether that\\u2019s cross-country or downhill) is for a small part of the MTB demographic, after all \\u2013 but for day-to-day riding, every major brand has several options.\\nCross-country\\n\\n While XC courses are more technical than ever, speed is still the name of the game. Michael Steele \\/ Getty Images\\nCross-country mountain biking is generally considered as an all-out racing discipline comprising sprints, undulating terrain with punchy uphills, short but demanding descents, and a lot of pedalling.\\nAs cross-country races and rides are fast-paced and focused on eking the most out of a trail, low rolling resistance is key.\\nA light, flexible tyre carcass is necessary to achieve this goal \\u2013 to minimise weight at the extremity of the wheel and because a supple tyre typically rolls faster over rough ground. Hitting corners flat-out isn\\u2019t the priority here, so it doesn\\u2019t matter that sidewall support is compromised in order to keep the weight down.\\nWe\\u2019ve already covered Maxxis\\u2019 popular EXO 120 TPI casing, but Vittoria\\u2019s XC-Race is another example.\\n\\u201cIt\\u2019s a 120 TPI, one-ply, tubeless-ready structure, with graphene compound,\\u201d says Vittoria\\u2019s Ken Avery. \\u201cIt\\u2019s light and fast, but without being fragile.\\u201d\\nSchwalbe\\u2019s Racing Ralph and WTB\\u2019s TCS Light are other examples of XC-focused casings.\\nExamples of cross-country race tyres\\nMaxxis Aspen (120 TPI EXO casing)\\nSchwalbe Racing Ralph (Super Race casing)\\nVittoria Mezcal (XC-Race casing)\\nWTB Ranger (TCS Light 120 TPI casing)\\nDowncountry and trail riding\\n\\n Downcountry and trail tyres need to stand up to more than XC tyres, but efficiency is still important. Steve Behr \\/ Immediate Media\\nDowncountry mountain biking can be loosely defined as \\u2018cross-country plus\\u2019 \\u2013 taking lightweight bikes and thrashing them on trails a full-on race bike wouldn\\u2019t be suited to.\\nIt\\u2019s not dissimilar to trail riding, so while we\\u2019re starting to see tyres designed with downcountry specifically in mind, including the Schwalbe Wicked Will and Vittoria Syerra, we\\u2019ll cover both together here.\\nHigher speeds and technical features demand more of your tyres than cross-country riding, so stronger sidewalls provide added stability and better absorb the hits when hauling down rocky singletrack.\\nBut the appeal of downcountry or trail riding is in the ease with which you can pedal along flat sections and up hills, so low weight and rolling resistance are still extremely important.\\n\\n The Vittoria Syerra DWN CNTRY is a downcountry-specific tyre. Alex Evans\\nDowncountry or trail tyres typically use a single-ply, 60 TPI carcass, often with some extra support or puncture resistance built in.\\nMaxxis, for example, recommends its single-ply 60 TPI tyres with EXO sidewall protection for trail or downcountry riding. These tyres are different from Maxxis\\u2019 120 TPI EXO protection versions, identifiable by model designation printed on the sidewall.\\n\\u201cThe 60 TPI casing on its own is considerably tougher than our 120 TPI casing, which means better durability and support while cornering,\\u201d says Chamberlain. \\u201cEXO provides a little extra insurance on the sidewalls.\\u201d\\nExamples of downcountry and trail tyres\\nMaxxis Ardent (60 TPI EXO casing)\\nSchwalbe Wicked Will (Super Trail or Super Ground casing)\\nVittoria Syerra (Down-Country casing)\\nWTB Trail Boss (TCS Light 60 TPI casing)\\nAll-mountain riding\\n\\n All-mountain riding requires a tough and resilient tyre that doesn\\u2019t weigh too much, so that climbs aren\\u2019t a chore. Ian Lean \\/ Specialized\\nAll-mountain sits somewhere between trail riding and enduro.\\nThe focus is on clocking up the miles on rugged terrain, so covering ground is more important than smashing the downhills. Therefore, a tyre casing needs to be relatively light but able to withstand a lot of trail time and, in all likelihood, the many hits and grazes from pedalling over rocky ground.\\n\\n WTB says riders often choose the hardier TCS Tough casing for the rear tyre. Andy Lloyd \\/ Immediate Media\\nSome brands or riders might class trail and all-mountain riding as one and the same \\u2013 Vittoria, for example, recommends its Trail casing for all-mountain riding. WTB says it often sees people choosing a TCS Light casing for the front wheel and a TCS Tough for the rear for a balance of both weight and durability.\\nExamples of all-mountain tyres\\nContinental Trail King (ShieldWall casing)\\nMaxxis Minion DHF (EXO+ 60TPI)\\nMichelin Force AM2 Competition Line (Gravity Shield casing)\\nWTB Trail Boss (TCS Tough casing)\\nEnduro riding\\n\\n Enduro racing places the focus on riding downhill \\u2013 fast \\u2013 but there\\u2019s still plenty of pedalling involved. THE MERIDA EX ENDURO \\/ Paul Box\\nEnduro is a racing discipline where riders have to get to the top of the mountain in a set time (usually under their own steam) then race a series of mostly downhill stages against the clock, with the stage times added up to decide the race winner.\\nIt involves long days in the saddle taking in every terrain imaginable \\u2013 rocks, roots and jumps, with plenty of pedalling in between.\\nBasically, it\\u2019s what most people do on a mountain bike, which is why a large portion of the mountain biking public now count an enduro-derived bike as their daily ride.\\nIn order to survive the rigours of modern riding, enduro mountain bike tyres need to be sturdy, abrasion-resistant, well-supported on the sidewalls, and they should damp vibrations.\\nThose are the priorities, but as do-it-all tyres, they should \\u2013 ideally \\u2013 also be easy enough to pedal around on. Not too much drag and not overly heavy, even if you\\u2019ll lose some efficiency against faster tyres.\\nSome racers and heavier riders might use full-on downhill tyres on their enduro bikes, but most people are more comfortable on something robust but a little lighter, such as Schwalbe\\u2019s Super Gravity casing or Maxxis\\u2019 DoubleDown offering.\\n\\n Schwalbe\\u2019s Super Gravity casing, as seen here on the Big Betty tyre, is well suited to enduro-style riding. Ian Linton \\/ Immediate Media\\nWTB, on the other hand, makes its TCS Tough tyre casing for more aggressive enduro-style riding.\\n\\u201cTCS Tough tyres feature a dual-ply casing, and while extra rubber means extra weight, it also means better defence against punctures and improved stability,\\u201d says WTB\\u2019s Heaton.\\n\\u201cThe thicker sidewalls can withstand higher forces before they deform, so they provide great support when dealing with heavy corners and compressions.\\u201d\\nExamples of enduro tyres\\nHutchinson Griffus (66 TPI dual-ply Hardskin casing)\\nMaxxis Minion DHR II (DoubleDown casing)\\nSchwalbe Magic Mary (Super Gravity casing)\\nWTB Judge (TCS Tough casing)\\nDownhill riding\\n\\n Downhill riding puts a lot of strain on your tyres. Steve Behr\\nDownhill riding\\/racing and gravity-focused bike park laps really put a tyre carcass to the test.\\nHigh speeds over rough ground, extremely technical sections, G-forces around banked turns and heavy braking require the strongest casings, within reason \\u2013 the bike still needs to remain a manageable weight, even if there is an uplift, without sacrificing the tyre\\u2019s practicality.\\nYou might want to choose a downhill casing if most of your riding is at the bike park or pointing downhill, or if you are a heavier or faster rider and find your current tyres flex a lot in turns (which usually leads to the tyre\\u2019s bead breaking its airtight seal against the rim, burping air).\\n\\n The Maxxis Minion DHR II is a highly-rated downhill tyre. Alex Evans\\nNot all brands offer an all-out downhill tyre casing. Like cross-country at the other end of the spectrum, it\\u2019s a smaller market, and making tyres is an expensive business.\\nSchwalbe, Maxxis, Continental, Vee, Bontrager and Specialized all make World Cup-proven downhill tyres with dependable, well-supported casings.\\nExamples of downhill tyres\\nBontrager G5 Team Issue (Dual-ply casing)\\nMaxxis Assegai (Downhill casing)\\nSchwalbe Magic Mary (Super Downhill casing)\\nVee Tire Snap WCE (Gravity Core casing)\\nWhat else is there to consider\\nFront rear vs rear wheel\\nGenerally speaking, the front wheel of a mountain bike supports less of a rider\\u2019s weight compared to the rear. That means front-tyre pressures can be lower than the rear but also lighter, thinner-carcass tyres can be fitted.\\nUsing a thinner-carcass front tyre saves overall weight but doesn\\u2019t significantly impact puncture protection, and unless the rider is particularly hard or heavy shouldn\\u2019t reduce cornering stability and control.\\n\\n The Yeti 160E uses a Maxxis EXO+ casing front tyre and a DoubleDown rear. Andy Lloyd \\/ Immediate Media\\nLogically, it follows a thicker-casing rear tyre should be fitted to the rear wheel. This provides increased puncture protection and the stiffer carcass reduces the chances of burping or the tyre squirming in corners.\\nCombining a thinner front tyre carcass with a thicker rear offers a good compromise between weight, puncture protection and stability, and you\\u2019ll frequently see bikes factory-fitted with this configuration.\\nExamples of front and rear tyre-carcass combinations for each mountain bike discipline:\\nCross-country: Maxxis EXO casing 120 TPI front, Maxxis EXO casing 60 TPI rear\\nDowncountry: Schwalbe Super Ground front, Schwalbe Super Trail rear\\nTrail: Vittoria Trail [Tubeless TNT] front, Vittoria Enduro [Tubeless 2PLY] rear\\nAll-mountain: WTB TCS Light 60 TPI front, WTB TCS Tough 60 TPI rear\\nEnduro: Maxxis EXO+ or DoubleDown front, Maxxis DoubleDown or DH Casing rear\\nDownhill: VeeTire Enduro Core or Gravity Core front, VeeTire Gravity Core rear\\nTyre pressure\\n\\n Using a tyre pressure gauge removes much of the guesswork. Alex Evans \\/ Immediate Media\\nFinding the right tyre pressure for your mountain bike is part art, part science.\\nThat is to say, just like tyre carcasses, what pressures to run depends on the terrain, rider build (weight), wheel size, tyre width, rim width and construction, riding style and even the temperature. It\\u2019s a big topic that deserves some reading time, so we\\u2019ve got a separate, in-depth guide to mountain bike tyre pressures.\\nHowever, a tyre carcass can play its own role in selecting tyre pressures.\\nLightweight, single-ply cross-country tyres deform around objects a lot more easily than heavier dual-ply downhill tyres.\\nYou might think they\\u2019d therefore require higher pressures but, contrary to popular belief, cross-country racers often run surprisingly low pressures (sometimes as low as 15psi), for excellent grip on technical climbs, and because a supple tyre (achieved through the casing and pressure) rolls faster over rough ground.\\n\\n Balancing grip with puncture protection can be tricky. Russell Burton \\/ Immediate Media\\nThese lower pressures are usually accompanied with a tyre insert (more on these below) to help protect against punctures, and allow the competitor to carry on riding on a flat tyre, similar to automotive \\u2018run flat\\u2019 tyres.\\nOf course, there is always a limit as to how low or high you can run your tyre pressures, and you can bet that every World Cup cross-country racer has their own, top-secret pressure preference.\\nOn the other hand, enduro or downhill tyres with a heavier casing and\\/or sidewall support (or puncture protection) layer might allow a heavier or faster rider to drop the pressures without risk of tearing the tyre off in every turn or smashing the rim into every rock.\\nWhat about tyre volume\\n\\n The rear Minion DHR II is a whopping 2.8in wide. Andy Lloyd \\/ Marin Bikes\\nTyre volume means the volume of air inside the tyre. Mountain bike tyre volume can be affected by a number of factors, including rim width and profile and tyre width \\u2013 change either and the volume of the tyre changes too.\\nAlthough tyre volume and width and carcass thickness can be specified independently from one another, a larger-volume tyre requires more material for the same carcass thickness and can weigh significantly more than a lower-volume version with the same carcass construction.\\nThe higher volume can contribute to flexier sidewalls, which might not suit heavier or harder riders. Those types of riders will want to investigate tougher-casing, high-volume tyres, but these come with a significant weight penalty.\\nIn our tyre width test, wider options were faster nearly everywhere. Of course, there are other considerations than pure speed \\u2013 for example, if you are riding very long routes or you sprint (accelerate) a lot on your rides, the extra weight of a bigger tyre might have more of an effect that it would for riders who grind up hills then rocket back down.\\nHow does carcass thickness influence tread pattern\\n\\n The Verdict\\u2019s knobs have been changed to improve grip. Alex Evans \\/ Our Media\\nMountain bike tyre tread patterns vary massively, with each one designed to suit certain conditions.\\nFor example, there are low-profile patterns for faster rolling speed, chunky treads for ultimate grip and braking control, and widely spaced knob patterns to help shed mud and dirt on winter mountain bike tyres. You\\u2019ll find a tyre for pretty much any condition among most manufacturers\\u2019 catalogues.\\nIn general, really lightweight (120 TPI, single-ply) tyres have less aggressive tread patterns because they are designed with rolling speed as a priority.\\nTyres with the burliest two-ply casings usually have the most aggressive tread patterns to help search for grip in the gnarliest conditions.\\n\\n This Vittoria Syerra DWN CNTRY has a round profile, and has been built about 30mm internal-width rims. Alex Evans\\nAnd between the two extremes, there is crossover.\\nTyre models with specific tread patterns \\u2013 whether that\\u2019s Vittoria\\u2019s Mazza, WTB\\u2019s Verdict or a host of other tyres \\u2013 are available in multiple casing types, where the tyre\\u2019s tread pattern and the associated model name refers specifically to the type of terrain it\\u2019s designed for, rather than the casing type it\\u2019s constructed with.\\nFor example, Maxxis offers its popular Assegai tyre, which was originally designed for downhill world champion Greg Minnaar and has an aggressive tread pattern, in its 60 TPI (single-ply), DoubleDown (120 TPI dual-ply) and Downhill (60 TPI dual-ply) casing options \\u2013 for anything from trail riding to enduro and downhill use.\\nDoes carcass type affect tyre compound\\nIn short, no.\\nTyre carcass type won\\u2019t normally affect the tyre compound used. Manufacturers are able to produce any casing type matched with any of their rubber compounds.\\nHowever, with the exception of fast cross-country race tyres, the cheapest-to-produce tyres, with the thinnest carcasses, are generally made with the least grippy rubber in a bid to reduce costs.\\nWhile branded, these tyres are typically fitted as original equipment to many bikes, especially cheaper mountain bikes. Depending on the terrain you ride, it could be worth upgrading your bike\\u2019s stock tyres to rubber with a grippier compound to improve performance.\\nCompound has a significant influence on the performance of a mountain bike tyre, so matching up both carcass type and compound to your riding style and the terrain will play a big part in finding the right setup.\\nSofter compounds grip better on roots and rocks, and have a more planted feel, but wear faster and have more rolling resistance. A harder compound will be more durable but offer less grip.\\nDo tyre inserts affect carcass performance\\n\\n Tubeless tyre inserts are designed to protect rims from dents and tyres from pinch flats. Russell Burton\\nA tyre insert is an extra, separate buffer layer that sits inside the tyre. Its purpose is to provide a cushioned layer that sits on top of the rim, and to add to the structure of the tyre system.\\nWhen the tyre compresses from a heavy hit (into a square-edged rock, for example), the tyre insert can help protect the rim from damage and slow the impact \\u2013 so it\\u2019s a way of further controlling the feel of a tyre and limiting punctures and rim dents or cracks.\\nIn turns, the insert might also aid with supporting the tyre so there is less side-to-side flex.\\nIt requires a bit of testing, but a tyre insert combined with a lighter carcass than you\\u2019d normally use might give your bike a more planted feel and protect your rims from damage without a great weight penalty.\\nHowever, inserts are famously difficult to install (CushCore has made a specific tyre lever to help) and not everyone enjoys the way they ride.\",\"image\":{\"@type\":\"ImageObject\",\"url\":\"https:\\/\\/images.immediate.co.uk\\/production\\/volatile\\/sites\\/21\\/2021\\/05\\/Giant-Reign-SX-03-eaf7f1b.jpgquality=90&resize=768,574\",\"width\":768,\"height\":574},\"headline\":\"Demystifying mountain bike tyre carcass construction: everything you need to know\",\"author\":[{\"@type\":\"Person\",\"name\":\"James McKnight\"}],\"publisher\":{\"@type\":\"Organization\",\"name\":\"BikeRadar\",\"url\":\"https:\\/\\/www.bikeradar.com\",\"logo\":{\"@type\":\"ImageObject\",\"url\":\"https:\\/\\/images.immediate.co.uk\\/production\\/volatile\\/sites\\/21\\/2019\\/03\\/cropped-White-Orange-da60b0b-04d8ff9.pngquality=90&resize=265,53\",\"width\":182,\"height\":60}},\"speakable\":{\"@type\":\"SpeakableSpecification\",\"xpath\":[\"\\/html\\/head\\/title\",\"\\/html\\/head\\/meta[@name='description']\\/@content\"],\"url\":\"https:\\/\\/www.bikeradar.com\\/advice\\/buyers-guides\\/mtb-tyre-carcass-construction\\/\"},\"datePublished\":\"2022-02-13T18:00:49+00:00\",\"dateModified\":\"2022-02-13T22:02:12+00:00\"}] Demystifying mountain bike tyre carcass construction: everything you need to know We delve deep into the world of mountain bike tyre casings 153554b96e
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