If you have a rear wheel with a Stan's 3.30 hub and you want to upgrade to SRAM's XX1 eleven speed, you'll be needing one of these so the cassette will fit.
Sram XX1 compatible
Through axle or QR
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Q: Hi, I have a Trek Superfly Elite full suspension 2013. It comes with Bontrager sealed cartridge bearing, alloy axle, rear hub w/Bontrager Mustang 28-hole disc rims. Also, it has 10 speed Shimano XT cassette. I want to know if this driver is compatible or what would be the one in order to upgrade to something better. Thank you,
A: This for use with Stans hubs only and XX1 cassettes only.