Continental Tire ´´Race King´´Wire, 180TPI, black Classic competition tire for Cross Country or Marathon, versatile and smooth-running profile, for every terrain.At the Research & Design department of Continental in Korbach, Germany is a permanent search for the solution to an old problem:- The rolling properties of the rubber of a bicycle tire are mainly determined by three different factors: grip, rolling resistance and service life.The dilemma:- Improving one characteristic often comes at the expense of another.- A tire with a lot of grip wears out faster and rolls slower.- But if the tire has to become faster, or has to last longer, this is at the expense of the grip.- A very good compromise has already been reached with the current, highly advanced silica gel-based technology.- However, the engineers were not yet satisfied.- They broke new ground and achieved a breakthrough in the composition of the mixture:- BlackChili compound is the name of the material for the tread, based on the latest knowledge of natural materials and polymers.Specifications: - Version:clincher tires- Bet range: cross- Inch: 29 ´´- ETRTO: 55-622- TPI / EPI: 180- Maximum pressure: 4 bar- Maximum pressure: 58 psi- Inch size = 29x2.20- Etrto size = 55-622- Weight: 740g