Continental 0125627 Tour Ride 700 x 42 Urban Tire offers everything a real all around tire needs. A tread for every intended surface, the obligatory breakdown protection belt and a high mileage compound ensure the Tour Ride is a trustworthy option for many carefree miles. Deep, aggressive tread pattern guarantees high mileage, predictable traction and excellent puncture protection. Reinforced sidewalls protect the casing from environmental effects. Specs: Weight - 770 grams; Recommended PSI - 50; Maximum PSI - 65; PU - 10.http://sheldonbrown.com/tire-sizing.html#iso