This super fast-looking city slicker turns any bike into a racer, helping bike messengers meet tight deadlines or fitness riders who require a faster tyre than the original knobbly tyres that their bike was supplied with. Puncture protection and reliability are taken care of thanks to Continental's renowned hard-wearing tread compound and two SafetySystem anti-practure layers beneath the tread. An improved 180 tpi (threads per inch) nylon casing increases speed and comfort. This is because the finer casing material deforms more quickly around imperfections in the road surface compared to a lower TPI casing. This feature also improves puncture resistance. The CONTACT Speed also features a 'skin wall' sidewall. Most city/trekking tyres use a 'gum wall' meaning lots of rubber in the sidewall to improve sidewall puncture resistance. A skinwall sidewall is much faster than a gumwall but just a little forward thinking is needed to avoid scuffing kerbs and to always maintain the minimum recommended tyre pressure. 'Micro-diamond' tread pattern rolls fast yet grips on loose debris covering road surfaces like grit, gravel or mud. Reflective sidewalls are an option for added safety and the CONTACT Sport can be used with dynamo lights.