GOLDIX XD/HG 12S 46T/51T 12S XD 10-46T/51T for SRAM 12-speed XD structure, not support XDR!!!!!! 12S HG 11-46T/51T for SHIMANO 12-speed HG structure 12S XD 10-46T:10-12-14-16-18-21-24-28-32-36-40-46T about:280g±10g 12S XD 10-51T:10-12-14-16-18-21-24-28-32-38-44-51T about:298g±10g 12S HG 11-46T:11-13-15-17-19-21-24-28-32-36-40-46T about:290g±10g 12S HG 11-51T:11-13-15-17-19-21-24-28-32-38-44-51 about:295g±10g Materials: High-strength steel (9 front) and 7075 alloy (3 rear)Weight: See description and actual weightColor: Black and SilverCassettes offer a wider gear range, better value, and less weight than our competitors. Now, our ULT cassettes feature an improved construction for smoother shifting. Lightweight, strong, and perfectly balanced Dear friends, please be sure to confirm your hub model before placing an order, otherwise it will not be installed!

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