The S-Works Fast Trak has become synonymous with fast and light weight tyres that are able to handle the most technical courses in the most gruelling conditions. The block pattern is carefully arranged for fast rolling abilities and superb traction while the blocks have been optimized to adapt to slippery surfaces with enough bite for loose ground. Our GRIPTON compound meanwhile has also been implemented into the S-Works Fast Trak giving it a lively feel and enhanced grip in both wet and dry conditions. This combined with an ultra-light and supple 120 TPI casing makes the S-Works Fast Trak the ultimate XC race tyre. Specialized S-Works Fast Trak 2Bliss Tyre Features Casing:120 TPI Bead: Foldable Butyl wrapped bead = 2Bliss Ready Compound: GRIPTON® 29 x 2.1, psi 25-50, approximate weight 550g 29 x 2.3, psi 25-50, approximate weight 595g