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TIRE PRESSURE GAUGE<br />
Close up of bicycle tire<br />
The compression of the spring is proportional to the force on it, which is in turn proportional to the air pressure in the tire.

Fphoto-64980910B-6JY.jpg

TIRE PRESSURE GAUGE
Close up of bicycle tire
The compression of the spring is proportional to the force on it, which is in turn proportional to the air pressure in the tire.

Copyright:© 2009 Jeff J. Daly - Fundamental Photographs

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Jeff Daly