Pro 4 XD Driver

This is the required driver for your Hope Pro 4 rear hub. This is the XD model, used to fit all SRAM 11 and 12-speed cassettes EXCEPT for the NX PG-1130 cassette. Also fits the SRAM X01 XG-795 Mini Block cassette. If you are mounting the NX PG-1130 cassette, then you'll need the HG driver model instead.