Riders replacing worn bearings in external bottom bracket cups that take a 6805 size.
This is a 6805 sealed bearing with a 25 mm bore, 37 mm outer diameter and 7 mm width. It is listed as compatible with external bottom brackets, where the bearings sit in cups that thread into the frame.
Size is what counts here. Read the code on the bearing you are replacing, or measure it, because some designs use a slimmer 6 mm wide 6805 instead. External bottom brackets hold a bearing in each cup, so it is worth changing both at once.
6805 size
25 mm bore, 37 mm outer diameter and 7 mm wide.
Sealed bearing
A sealed bearing keeps grease in and dirt out.
For external bottom brackets
Listed as compatible with external bottom bracket cups.
Bearing
Great for
Maybe not for
Match all three numbers: 25 mm bore, 37 mm outer diameter and 7 mm width. Read the code on your old bearing, or measure it, before ordering.
Change both bearings, press on the outer ring
External bottom brackets have a bearing in each cup, so it is worth replacing both together. When pressing a bearing into a cup, push on the outer ring only, so the force does not go through the balls.
