Speedhub Axle DiscNO Torque Arm Required. (Useful for Full Suspension frames with Horstlink type pivot - where Torque arm would not operate due to effective changing on Chainstay length). Uses International Disc Mount fitting on frame.Available for TS or CC hubs.(Note: Additional Speedbone required if using Disc brakes)These are suitable for the Surly Troll/Ogre and ECR dropout fittings