Wolf Tooth Single Speed Spacer Kit Lockring - Compatible any 10 11-Speed HG Freehub BodyWolf Tooth Single Speed Spacer Kit with Lockring Compatible with any 10 or 11 Speed HG Freehub Body. Wolf Tooths single speed spacer kits are compatible with Shimano HG type 10 or 11 speed freehub bodies and provides riders with the ability to adjust their chainline as needed. Compatible with any 10 or 11 speed HG freehub body Spacers can be used in combination to achieve 45 47. 5 49 52 and 55mm chainlines Made in the USA TECH SPECS Cassette Body Type