Excellent race tyre for damp, sticky or low mud conditions. Deep shoulder knobs provide excellent cornering grip whilst central knobs offer great balance of grip and low rolling resistance. The "open tubular" design uses the constuction techniques of a tubular with the practicality of a clincher tyre. Technical featuresUse: Cross Racing: Sticky MudSize: 700Tire Width: 33 mmRim Width: 15-19 mmWeight: 360 grTPI: 300Bead: AramidCasing: SuperPolyFlat protection: PPSBAR: 2-6PSI: 30-90Due to the extra supple nature of this tyre we recommend reading the Fitting Information from Challenge