The Specialized Fast Trak 2 Bliss tyre is a fast rolling, cross country mountain bike tyre. Specialized have used computer modelled Finite Element Analysis (FE) in order to optimise the tread on the Fast Trak for better cornering traction & block spacing is configured for better self-cleaning. The Fast Trak uses Specialized’s own Gripton rubber compound which gives a gripper, faster rolling tyre that gives a livelier feel & enhanced grip in wet or dry conditions. As a 2 Bliss ready tyre you can run the Fast Trak either with a standard tube or on a tubeless setup. Casing: 60 TPI Bead: Foldable Butyl wrapped bead = 2 Bliss Ready Compound: GRIPTON 29 x 2.1", psi: 25-50, approximate weight 625g