Product Description Specifications:Application:CyclocrossProduct Line:proType:folding tyreTubeless System:Tubeless ReadyTechnical Information:Rubber Compound:0-CompoundCarcass:300 tpi, SuperPolyPuncture Protection:PPSFeatures:cyclocross tyres for muddy surfacesaggressive tread designgood self-cleaningModels:33-622 (700x33c) Dimensions:700 x 33cETRTO:33-622Air Pressure (max.):5.0 barsRecommended air pressure:1.8 - 2.5 barsCompatible inner rim width:17 - 25 mmManufacturer Number:00621 Manufacturer's Warning: Challenge tyres should not be mounted on wheels that do not meet ETRTO and ISO standards. Non-compliant wheels could cut through the sidewall above the bead, causing the tyre to burst and possibly injuring the rider. Technology:Handmade Tubeless Ready Handmade TLR tyres are made from the same materials and using the same processes as Challenge's handmade tubular tyres, except that no inner tube is incorporated. The carcass is wrapped around an aramid bead so that the tyre can be mounted on a clincher rim. Handmade tubeless ready tyres impress with their flat shape, which allows for a natural deformation of the carcass on uneven ground and a lower rolling resistance. A tubeless set-up with sealant maintains the signature suppleness of handmade Challenge tyres. PPS The Puncture Protection Strip (PPS) is a special material layer between the tread and carcass of a tyre to increase its puncture resistance. SuperPoly The SuperPoly carcass is made of polyester, which is characterised by its durability and waterproof aspects, while at the same possessing remarkable flexibility. The TPI number is significantly higher than for other carcasses, so the material is finer and therefore more flexible. Contents:1 x Weight: black-light brown | 28 | 33 mm | 33-622: 405 g Manufacturer: Challenge Tires Via Montello 18 31050 Fregona (TV) Italy info@challenge-tyres.com