Yea... While you are riding, just wipe the leather (or substitute) palm of a riding glove onto the tire after you hit a patch of sharp gravel or glass.
The rear wheel is tricky, but the front is most important (and easiest).
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Cat 2 Track, Cat 3 Road.
"If you’re new enough [to racing] that you would ask such question, then i would hazard a guess that if you just made up a workout that sounded hard to do, and did it, you’d probably get faster." --
the tiniest sprinter