The name Grand Prix has become a brand of its own in cycling circles worldwide. The Grand Prix is THE classic tyre marking quality and performance. Not unlike its predecessor, this generation is eager to change traditional standards. With a higher sidewall profile (height) than the GP4000S, the Grand Prix focusses on comfort and reliability, ideal for long, but fast days in the saddle. Specification Ply/TPI- 3/180 . Compound: BlackChili, PolyX Breaker Anti-Puncture layer. Weight: 225g - 700x23c. Sizes: 700x23c - 700x25c.