Saris Freehub XD/XDR
This freehub body from Saris is a genuine replacement part that enables you to use SRAM 11 and 12-Speed XD and XDR cassettes with the Hammer, H2 and H3 direct-drive smart trainers.
SRAM XD compatible with cassette adapter included
SRAM XDR compatible without spacer
Works with Hammer, H2 and H3 trainers
B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.
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Keep it going all winter long. Here's a guide to trainer types.