Riders replacing a worn 25 x 37 x 6 mm bearing who want a sealed steel bearing.
The BlackBearing B3 range is made as a quality alternative to the bearings fitted to mid-range bikes. This one has chrome steel rings and balls, a metal cage and 2RS seals, with a black oxide finish.
It is the W6 size, 25 x 37 x 6 mm, which is 1 mm narrower than the standard 6805 at 25 x 37 x 7 mm. BlackBearing lists the two as separate parts, so read the code on your old bearing or measure it before buying.
Chrome steel throughout
Chrome steel rings and balls with a metal cage.
2RS seals
Rubber seals on both sides help keep water and dust out.
Black oxide finish
A corrosion-resistant coating on the steel.
Narrow W6 width
6 mm wide, 1 mm slimmer than the standard 6805.
Bearing
Great for
Maybe not for
Width is the catch. This W6 bearing is 6 mm wide, while a standard 6805 is 7 mm. Check the code on your old bearing and the depth of the seat before ordering.
Match the width, not just the code
Bearings in the 6805 family share a 25 x 37 mm footprint but come in different widths. BlackBearing lists this W6 at 6 mm and the standard 6805 at 7 mm as separate parts, so measure your old bearing, or read its code, before you order.
