Tire inserts like cushcore let you run really low pressures without worrying about squirming the bead off your tire, even on hard corners. They’re really a game changer- I still run decent PSI on the daily as I do a lot of climbing, but you can lower it down like crazy if you go to the bike park or if you’re ending a ride with all downhill. They supposedly decrease rolling resistance too; not sure about that but the increased sidewall stiffness is definitely noticeable.
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