BMC bottom bracket replacement.
shylock1966 Posts: 12
I have now ungraded many parts on my bike with help of this forum now to the next problem. My bottom bracket on my bike creaks a lot so I wish to replace it. It has the following info on it - SM-BB5700 - BC1.37 X 24 ROAD. I cannot find a replacement if I type into wiggle etc it comes up with a ultergra part. Can anybody advice of correct part and what tools needed please. I have attached a couple of photos for you assistance.
The most obvious replacement would be the SM BBR60 bottom bracket which is an Ultegra branded one. You need to be aware the there was a change in diameter for the outer cups between the BB5700 and the BBR60. Consequently you will need a larger removal tool for the 5700 like this
If you buy a new BBR60 it will usually be supplied with a reducing insert that will allow you to use the above tool to install the new BB. However if it doesn't come with one they are cheap to buy.
English thread bottom bracket shell standard so if you buy the Wiggle BBR60 choose the English thread option and not the Italian thread version.