Thread: Tire Inflation?
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Old 08-15-09, 07:44 PM
aka Tom Reingold
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Wow, what a lot of misinformation. The cap does not form the seal. The tire does the job of holding the pressure, though the tube makes the seal, i.e. it holds the volume.

Riverside Guy, tires are tested in the factory at double the rating. I would use 100 psi on the rear tire. You don't need nearly as much on the front, since a typical bike bears 2/3 of the weight on the rear wheel. Experiment to see what pressure is the point of diminishing returns. In other words, if 100 doesn't feel quicker than 90, then stick to 90. Make sure you're not bottoming out on the rim when you hit bad potholes, though. If you are, increase your pressure.
Tom Reingold,
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