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The guide 700c tire pressure

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As the increasing number of people using 700C rim for commuting, the more questions like “how hard the tires should be pumped?” well, the smaller the tire, the tire pressure even higher. it will be difficult to explain the physics, the calculation of tire pressure, which is obtained from its user manual Maxxis, which can be translated as follows:

Rear Tire Pressure
Tire Width = 20c: Pressure(psi) = (0.33 * Rider Weight in lbs) + 63.33
Tire Width = 23c: Pressure(psi) = (0.33 * Rider Weight in lbs) + 53.33
Tire Width = 25c: Pressure(psi) = (0.33 * Rider Weight in lbs) + 43.33
Tire Width = 28c: Pressure(psi) = (0.33 * Rider Weight in lbs) + 33.33
Tire Width = 32c: Pressure(psi) = (0.17 * Rider Weight in lbs) + 41.67
Tire Width = 37c: Pressure(psi) = (0.17 * Rider Weight in lbs) + 26.67

Front Tire Pressure = 90% x Rear Tire Pressure
for example, such as weight 68kg, if converted into pounds mean 150lbs. tires that I use 700x28c size. the pressure becomes:

Rear Pressure (psi) = (0.33*150) +33.33 = 82.83psi
Front Pressure = 90% x 82.83psi = 74.55psi

please count, do not let the small size but the tire pressure is less. snakebite fit commuting, annoying … especially if it does not bring in a spare tire, or bring a spare inner tubes Presta but her nipple and does not carry a mini pump. That sucks. big time. believe me. For more details here

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Written by qtechmaria

August 27, 2010 at 2:44 pm

Posted in Tips

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