What is the bearing size on my unicycle?
Most unicycles manufactured in China, Japan and Taiwan use the standard 17mm ID (inside diameter), 40-mm OD (outside diameter) bearing. Brands that have made this their standard include: Coker, Miyata, Savage, Semcycle XL, Torker, United, Yuni and Zephyr. Brands that use 19-mm x 40-mm: DM ATU and Vortex, Kris Holm standard, Onza and Profile. Brands that use 19-mm x 41-mm: DM ATU and Vortex (early models), Kris Holm Pro Series (early models) Brands that use 17-mm x 35-mm bearings: Pashley, Semcycle Deluxe and Schwinn (Schwinn bearings have two grooves and two circlips).
