Convertible to all axle types - end caps included Double Time four pawl internal mechanism Compatible with all XD 11s and XDR 12s road cassettes Boost variants available 24, 28 or 32 spoke holes Includes spacers for 11sp applications RR 11-12s XD 28H QR/12TA Aluminum Blk 6B 135mm/142mmUPC/EAN/GTIN: 710845784767