Home mechanics and workshops rebuilding a hub or other part that takes a standard 6902 bearing.
The CEMA 6902LLB is a sealed radial cartridge bearing measuring 15 x 28 x 7 mm. It's one of the common sizes found in bicycle wheel hubs, and it also turns up in other spots such as suspension pivots, so it's a handy one to have on the shelf.
It's made from chrome steel and packed with lithium grease, with two black rubber seals to keep water and grit out. CEMA builds this range specifically for bike use, including hubs, bottom brackets and chain tensioner pulleys, so it's made for Melbourne winters as much as summer.
It's sold as one bearing. Most hubs use two or more, so check how many your wheel needs and replace them as a set for the smoothest result.
Standard 6902 size
15 x 28 x 7 mm, a common bearing in bicycle hubs.
Sealed both sides
Two rubber seals keep grit and water out.
Greased and ready
Pre-packed with lithium grease, just press it in.
Chrome steel
A durable, great-value choice for everyday riding.
Bearing
In the box
LLB sealing
A rubber seal on each side keeps grease in and water and grit out, so the bearing suits year-round riding.
Great for
Maybe not for
Fits anything that takes a 6902 bearing: 15 mm bore, 28 mm outside diameter, 7 mm wide. Check the number printed on your old bearing's seal or your hub's service documents. Sold individually.
Press, don't hammer
Use a bearing press or a drift that pushes on the outer race only. Hitting the inner race or the seal can damage a new bearing before it's done a single kilometre. If you don't have the tools, drop the wheel in and we'll do it for you.
Replace in pairs
If one bearing in a hub is rough, the other has done the same kilometres. Swapping both at once saves pulling the hub apart again a few weeks later.
