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May 29, 2018, 8:30 p.m. -  Alex D

Sounds like a comparison might be in order. These inserts work a little like volume tokens. You get to run less pressure for better grip and less chatter, but with a steeply increasing spring rate and no chance the tire will fold or bottom on the rim. Might be more compelling than a heavy casing alone. I've started to see reports of their use even from weight-weenie XC racers.

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