![]() ![]() If the air pressure in your tires is too low, the inner tube gets pinched between the tire and the rim, and the edges of the rim cut two side-by-side holes into the inner tube, which is called a "snake bite."įor fatter rubber, such as what's on most off-road bikes, once a week is about right. What happens when there's not enough air in your tires? Besides making your bike not as efficient as it should be, the biggest danger is what's called a "pinch flat." Suppose you run over a pothole, curb, rock, stick, or other sharp obstable. A bicycle tire can lose as much as 10% to 20% of its air in one day. But with bicycle tires, a little bit of air makes a big difference. The same thing happnes to your car tires, but it's not as critical because the amount of air lost is so small compared to the large volume of air in a car's tire. How does this happen? The little molecules of air wiggle their way out between the molecules of rubber in the inner tubes and tires. Why? Your tires lose air over time, even overnight. ![]() You should check your tires before every ride. Properly inflated tires ride best, last longer, and resist punctures. The easiest way to keep your bicycle running well and preventing flat tires is to keep your tires properly inflated. ![]()
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