Over the years we have compiled a list of bearings sizes required for different bicycle components.
If a specific bearing manufacturer is named, it just means this is the brand originally used by the component manufacturer – any other brand the same size will work.
Assume that all sealed cartridge bearings are 2RS (2 Rubber Seals) as this is the norm.
Action Tec. 6903 = 17x30x7mm
Coda Magic 900. 6805 = 25x37x7mm
Fat Chance press-fit. 499502H = 5/8″ x 1-3/8″ x 11mm with Snap Ring
– for early Fat Chance/Yo Eddy/Wicked/Monster/Kicker
Fisher press-fit. 6003 = 17x35x10mm
Hope. SKF 61903 (6903) = 17x30x7
Klein Press Fit. 60032 (6003) = 17x35x10mm
Shimano Hollowtech II. 6805 = 25x37x7mm
Suntour VX Mountain Bike (Triple). 6903
Syncros Pro Series. SKF 61903 (6903)
White Industries Phantom. 6903
Hope Ti/Steel for Ti-Glide/Mono/XC. 6001-2RS (2 x bearings required)
– also requires: 30mm (actual) circlip to hold internal bearing in place
– and: internal alloy spacer 12mm(ID) x16mm(OD) x 13.8mm(length) before external bearing pressed in
FSA Pig (mk1) 1 1/8″ threadless . 5/32″ caged upper. 1/4″ caged lower.
Kona Impact (mk1) 1 1/8″ threaded. 5/32″ caged upper. 1/4″ caged lower.
Bullseye. 6001 = 12x28x8mm
Hope Ti Ultralight. Front. 6800-2RS (61800) = 10x19x5mm
Hope Ti (except Ultralight). 6001
Hope Big Un. Front. 6804 = 20x32x7
Pace RC50 Composite (mk1/2). Front & Rear: 6001
Ringle Bubba. Front & Rear. 6001
Suzue LPF Sealed Bearing. Front. 6000 = 10x26x8mm
Suzue LPF Sealed Bearing. Rear. 6200 – 10x30x9mm
TNT Ti Suspension. Front. 6804 = 20x32x7mm