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Can i use my ULTEGRA SL bottom bracket with a FSA SL:K chainset????

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  • ZacniciZacnici Posts: 1,385
    You can use a Shimano BB with FSA cranks except the carbon cranks. I researched this as I replaced the BB on my Goossamer with a DA BB and the only caveat I found was in respect of the carbon set ups. So if you have the SLK light carbon the answer is no.
  • AvoneerAvoneer Posts: 174
    Hi,

    I've got the SL-K carbon arms on my cheapo Shimano BB and they fit absolutely perfectly (despite people saying they won't).

    I checked all the dimensions with my calipers and they are exactly the same as the Shimano gear.

    Pat...

    [img:1ozajhfv]http://sphotos.ak.fbcdn.net/hphotos-ak-snc6/hs067.snc6/167715_1756849810801_1525678030_31782482_6792771_n.jpg[/img:1ozajhfv]

    [img:1ozajhfv]http://sphotos.ak.fbcdn.net/hphotos-ak-ash1/hs792.ash1/168265_1756850170810_1525678030_31782483_8374450_n.jpg[/img:1ozajhfv]
  • AvoneerAvoneer Posts: 174
    And IIRC, all the Shimano external BB's use the same casting for the bearings.

    Pat...
  • AvoneerAvoneer Posts: 174
    Yep - just checked - the Shimano BB's all use 6805 bearings (dimensions 25x37x7mm) which can be easily replaced for about £5 (despite also saying they can't).

    I also think FSA and a few other's use exactly the same bearing as well.......

    Pat...
  • ZacniciZacnici Posts: 1,385
    Thanks Pat, that is jolly useful to know, wish I had known that 2 months ago turned down a cheap SLK carbon as I didn't want to faff about with the BB; did a fair amount of research and as you say everyone says you can't - but you did. Never mind
  • AvoneerAvoneer Posts: 174
    No probs.

    And from what I can gather, all the Shimano external BB's have the same bearings, it's just the casing quality that vary (and not by much) so for what it's worth, the poverty £13 tiagra one does the job nicely.

    Pat...
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