High performance all conditions road race tyre which works well on all road surfacesasc silica compound offers low rolling resistance and light weight to ensure a fast and supple ride with excellent feedback and gripoutstanding puncture resistance due to the vectran breaker beltthe first road race tyre to include vectran which makes the gp4000 tougher and lighter than its predecessor the gp3000vectran offers more resistance to cuts than aramid is five times as strong as steel and is lighter than