The Stan’s Arch EX 29″ Disc Mountain Bike Wheel is stronger and lighter than before. Arch rims use Stan’s new bead socket technology instead of the traditional bead hook. The result is a lower rim sidewall, which reduces strain on the bead, creates a tighter seal and virtually eliminates pinch flats. It’s so effective, you can even get away with using thinner, lighter rim strips and still avoid pinch flats.

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