BMC bottom bracket replacement.

shylock1966

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.

flasher

Have a look at this thread:

https://forum.bikeradar.com/discussion/13112123/hollowtech-ii-bottom-brackets-compatability

arlowood

Yes the BB on your bike is a standard Hollowtech 2 threaded bottom bracket. The 5700 number suggests that it was installed along with a Shimano 105 5700 groupset. The 5700 BB is probably no longer available although you may find it second hand on Ebay or such like.

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

https://www.wiggle.co.uk/shimano-bb-spanner-for-hollowtech-ii-cups/?lang=en&curr=GBP&dest=1&sku=5360069094&kpid=5360069094&utm_source=google&utm_term=&utm_campaign=Shopping+-+All+Products&utm_medium=base&utm_content=mckv|slE3QFFo1_dc|mcrid|295296961877|mkw||mmt||mrd|5360069094uk|mslid||&mkwid=slE3QFFo1_dc&pcrid=295296961877&prd=5360069094uk&pgrid=57437518777&ptaid=pla-640857490957&gclid=Cj0KCQjw6PD3BRDPARIsAN8pHuF8TQ36FJR9-LNCzsw7QlL_4E5jwaJGDgGRbU_tdZz0-kbniL6JsXIaArUREALw_wcB

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.
https://www.wiggle.co.uk/shimano-bb-adaptor-installation-tool-tl-fc24/?lang=en&curr=GBP&dest=1&sku=498780&kpid=498780&utm_source=google&utm_term=&utm_campaign=Shopping+-+All+Products&utm_medium=base&utm_content=mckv|slE3QFFo1_dc|mcrid|295296961877|mkw||mmt||mrd|498780uk|mslid||&mkwid=slE3QFFo1_dc&pcrid=295296961877&prd=498780uk&pgrid=57437518777&ptaid=pla-640857490957&gclid=Cj0KCQjw6PD3BRDPARIsAN8pHuFPoGGmGJS5VZhdWf1CK3cQEn036revyge7snnplK2tpgIIhNDL2z0aAlSOEALw_wcB

reaperactual

To add to arlowood's sound information, the BC1.37 X 24 denotes
English thread bottom bracket shell standard so if you buy the Wiggle BBR60 choose the English thread option and not the Italian thread version.

shylock1966

Many thanks for the great advice arlowood & reaperactual I shall order the parts now.

redvision

Or purchase a hambini bb.

david37

redvision said:

Or purchase a hambini bb.

Does Hambini do screw in BB?

redvision

Not sure but he does manage to solve creaking bb's so if I were the OP I would seek his advice/ help.