Every last detail engineered for speed 14 months of aerodynamic developmentthe first windtunnel designed tire 13 watt power savings 21mm width is the optimal blend of aerodynamics, rolling resistance and durability Supple 290 tpi casing Cornerhugging silica rubber compound Puncture resistant construction hey, you can't win if you don't finish Includes tire pressure chart to optimize rolling resistance by rider weight and frontrear use The unrelenting
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