Forum home Road cycling forum Workshop

Bottom bracket identification

mikelskasmikelskas Posts: 57
edited June 2019 in Workshop
Hi guys,

Please could someone point me int he right direction with regards to this bottom bracket I need to replace.
It came from an old Boardman single speed that looks just like this one below. I have tried looking up the bike spec on Bikepedia but cannot find it.

boardman08_11_hi.jpg




Tie9wdF.jpg

ugJiQQC.jpg1

HRd542s.jpg

yspLZlc.jpg
2011 Jamis Ventura Race
2016 BMC TeamMachine SLR02

Posts

  • timothywtimothyw Posts: 2,482
    If you could do some pictures of the cranks them we could be more certain.

    I can tell you the bike has a British threaded bottom bracket fitting. I can't tell if you need a Shimano hollowtech 2 bottom bracket or a SRAM/truvativ gxp one.

    If it is a gxp one then it will have a star shaped hole on the non drive side. If it is the Shimano standard the hole on both sides is identical.
  • mikelskasmikelskas Posts: 57
    Thanks for the reply Tim. Here are some images of the cranks.

    tZFKh05.jpg

    GTf6oIo.jpg

    CnnZZxF.jpg

    jVgASEF.jpg

    ijeuQbW.jpg
    2011 Jamis Ventura Race
    2016 BMC TeamMachine SLR02
  • imposter2.0imposter2.0 Posts: 11,386
    Truvativ crank, so it will need a GXP BB. One of the pics shows the BB has 'GXP' written on it in any case...
  • mikelskasmikelskas Posts: 57
    Thanks Imposter, so I take it I could replace it with this BB from Amazon. Looks like it is 73/68.
    My BB shell measures 68mm so I understand I would need to use the spacers that come with it. The one thing that throws me off this one is the fact that the non-drive side has splines in it. It looks like these fit over the crank axle but Im not familiar with this design.

    51tK925ASCL._SL1000_.jpg


    https://www.amazon.co.uk/SRAM-English-T ... s_sp_1_vtp
    2011 Jamis Ventura Race
    2016 BMC TeamMachine SLR02
  • timothywtimothyw Posts: 2,482
    So it does! Hadn't spotted the GXP on my phone.

    £16 is a decent price here: https://www.merlincycles.com/sram-gxp-b ... 45036.html (English 68mm)

    You won't need to use the spacers, pretty sure they're only needed for mountain bike chainsets.
  • keef66keef66 Posts: 13,123
    TimothyW wrote:
    So it does! Hadn't spotted the GXP on my phone.

    £16 is a decent price here: https://www.merlincycles.com/sram-gxp-b ... 45036.html (English 68mm)

    You won't need to use the spacers, pretty sure they're only needed for mountain bike chainsets.

    That link shows out of stock but this one looks OK...

    https://www.merlincycles.com/sram-gxp-b ... 45036.html
Sign In or Register to comment.