Continental grand sport race road bike tyrethe continental grand sport extra road bike tyre is a high performance tyre designed for sportive riders a supple 180 tpi casing provides great rolling handling and grip with new nytech breaker technology to offer additional puncture resistance and all at a great price the grand sport race features a nytech breaker and a 3ply sidewall making it a real option for long hard training miles or epic spring autumn sportive rides featuressize 700recom