Is replacing the bearings on a HTII BB easy?

I’m guessing it would be a lot cheaper than replacing the whole unit.

dead easy with the right tools, if you want to borrow said tools and are in derbyshire then you are more than welcome

I didn’t think the bearings were replaceable? interested if anyone knows otherwise too!

Easy to do. YOu have to find the right size bearings tho – they actually vary slightly between different manufacturers

cruzheckler – cheers but in Bucks.

They are Shimano.

Any ideas if any instructions exist which will also include details of required tools?

Possibly useful?

http://www.mountainbikerides.co.uk/fettling/24-drivechain/35-shimano-hollowtech-ii-bottom-bracket-bearing-replacement.html

Looks good, I may even have the bearings too 🙂

As TJ said, the bearings Shimano use are narrower than std ones. Even so I stuck them in & just did away with one of the spacers either side. Has been working fine for few months. Be gentle with the “top-hats” as they split easily.

sweet, looks quite easy!

Not quite that simple.