A complete set of ALL BALLS top and bottom steering head bearings and seals for the Sherco trials models, 0.8 04-10, 1.25 99-10, 2.0 99-09, 2.5 99-10, 2.9 99-10, and the 3.2 4T 07-09. To double check these are the correct ones for your bike, please check your steering head or old bearings. These bearings have an OD of 42mm, and an ID of 20mm.