Which bb for 2010 giant trance x4,or buy complete chainset?

lexinoo

Hello.My bottom bracket is worn out,i was going to order one off tinternet can anyone help me with what size etc i need to order please?The standard one is a shimano BB-ES25 octalink according to the bike specsheet but on ebay this bb comes in different sizes,anyone know which i need?or would it be worthwhile upgrading to something like a deore or slx with external bearings which is obviously going to be a much more expensive option?Thanks.

nicklouse

you need to measure the axle, or look on the BB shell when you have removed it as it will say on it.

or have a look on the back of the arms and post up the part number. FC-???????? and someone might look up what is needed.

Proutster

For a direct replacement you need this one:

http://www.ebay.co.uk/itm/Shimano-Alivi ... 7b673903eb

with a 118mm axle length and 68mm shell width.

I bought one when I transferred the chainset from my Trance X4 to my hardtail. WIth the splined octalink set-up I think you're limited for choice.

By the way, I changed to the SLX double & bash set-up on my Trance, which comes with a really smooth Hollowtech II external bottom bracket. It's miles better than the Alivio kit that's OE on the X4 and is £95 from CRC at the moment:
http://www.chainreactioncycles.com/Mode ... elID=28019

1mancity2

I would upgrade although the more expensive option you will be gaining a lot more with a new chainset, the slx is a top piece of kit,

I run a twin and bash but before that I had the triple and both have been brilliant.

lexinoo

Thanks for the advice people