The Specialized Borough Armadillo 700x 45c Semi-Slick Tyre can be uszed on anything from tarmac to gravel tracks & the roughest cycle paths. The semi-slick central tread will roll fast in tarmac while the knobbly edges will dig in on rougher surfaces allowing you to corner with complete confidence. The Borough Armadillo excels in urban/transportation & adventure riding/touring/trekking cycling. It comes with Specialized’s top of the line puncture protection system to greatly reduce your chances of getting a flat. Casing: 60 TPI Bead: wire Compound: 70a Flat Protection: Armadillo 700 x 45; psi 50-85; approximate weight 730g