Forum home Mountain biking forum MTB workshop & tech

Have I destroyed my bottom bracket?

big_southern_jessebig_southern_jesse Posts: 729
edited April 2010 in MTB workshop & tech
I was out riding to day and my bottom bracket developed a lot of play. In the space of about 2 or 3 miles, it went from a barely noticeable movement to about 2 - 3mm of play on the drive side where the axle exits the bottom bracket. It's an external bottom bracket, and both the outer rings are tight and don't appear to have moved at all.

It's the first external bottom bracket I've had, and will be borrowing tools tomorrow to remove it and inspect it. The problem I have is I am racing on sunday, so need to start looking for a replacement immediately if it's a gonna!

So if the cups are tight, is there any other way for this play to have developed without something breaking?

Oh, I'm about 16 stone and running singlespeed, so although it's only a few months old, it has been subject to some fairly high loading!
Proved by testing to be faster than a badger.
The world's ultimate marmite bike


Sign In or Register to comment.