Tire Speed Rating Chart For tires with a maximum speed capability higher than 240 km/h (149 mph), a "ZR" may appear in the size designation. Tires with a maximum speed capability higher than 300 km/h (186 mph), require a "ZR" in the size designation. Consult the tire manufacturer f...
Tire Speed Rating Chart Speed SymbolMaximum SpeedVehicle Type L75mphOff-Road & Light Truck Tires M81mphTemporary Spare Tires N87mph P93mph Q99mphStudless & Studdable Winter Tires R106mphH.D. Light Truck Tires S112mphFamily Sedans & Vans ...
Threadless steering and a tapered headtube add agility and precision to the handling of the bike, and responsive mechanical disc brakes and knobby, all-condition tires give you control you can count on for all your rides, from your everyday commute to your grittier, off-road adventures. ...
However, the actual rolling diameter will be about 1% smaller for a road tire, and smaller yet at low inflation pressure. A deep tread, on the other hand, can increase the effective diameter. If you require greater accuracy than the chart or nominal tire size provides, do a rollout test...