What's a "snakebite"?
Snakebite flats are usually caused by the tire and tube being pinched between
the road and the rim, causing two small holes in the tube that look like
a snakebite. The usual causes are underinflation, too narrow a tire for
your weight, or hitting something (rock, pothole) while having your full
weight on the tire.
The obvious solutions are to make sure your tires are inflated properly,
use a larger size tire if you weigh a lot, and either avoid rocks and potholes
or stand up with your knees and elbows flexed (to act like shock absorbers)
when you go over them.
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