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Bottom Bracket Compatability

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  • 13-05-2019 9:19pm
    #1
    sann
    Registered Users Posts: 338 ✭✭


    Quick question.
    I have an R8000 ultegra crankset on a bike with what i believe is a Bb86.
    I want to replace it with a Fsa Slk 386 Carbon BB386evo chainset.
    Have tried loads of internet searching but can't seem to find out what type of BB I need for FSA chainset.
    Think the shimano is a 24 spindle and the Fsa is 30mm.
    Any help appreciated.


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    #2
    tuxy
    Closed Accounts Posts: 14,983 ✭✭✭✭tuxy


    I know very little about bottom brackets but if you're sure your current frame is bb86 I believe this is what you are looking for.

    https://www.bike24.com/p2114179.html


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    #3
    sann
    Registered Users Posts: 338 ✭✭sann


    tuxy wrote: »
    I know very little about bottom brackets but if you're sure your current frame is bb86 I believe this is what you are looking for.

    https://www.bike24.com/p2114179.html

    Cheers. Yes. Seems to tick all the boxes.


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    #4
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    OP, while the adaptor above will work personally I'd be slow to go that direction, those bearings are very compact for the load.

    Hambini is one of the bike tech commentators I'd give credence to, have a look at his comment here,

    https://weightweenies.starbike.com/forum/viewtopic.php?t=154186#p1441682

    and subsequent replies


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    #5
    sann
    Registered Users Posts: 338 ✭✭sann


    nilhg wrote: »
    OP, while the adaptor above will work personally I'd be slow to go that direction, those bearings are very compact for the load.

    Hambini is one of the bike tech commentators I'd give credence to, have a look at his comment here,

    https://weightweenies.starbike.com/forum/viewtopic.php?t=154186#p1441682

    and subsequent replies

    Thanks. What have I let myself in for?
    Should have done my research better before i bought the crankset.
    I will email Canyon and see what they think.
    If they cut it down i will throw it up on Donedeal and buy a Dura ace


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    #6
    tuxy
    Closed Accounts Posts: 14,983 ✭✭✭✭tuxy


    How long ago did you buy the new crankset. If it was less than two weeks ago amd you got it online you can send it back for a full refund.


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    #7
    sann
    Registered Users Posts: 338 ✭✭sann


    tuxy wrote: »
    How long ago did you buy the new crankset. If it was less than two weeks ago amd you got it online you can send it back for a full refund.

    Unfortunately I bought it as an unused item on Donedeal.
    I contacted canyon and they don't see a problem.
    They recommended me this

    https://www.chainreactioncycles.com/mobile/ie/en/fsa-pf30-road-bottom-bracket/rp-prod117849


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    #8
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    sann wrote: »
    Unfortunately I bought it as an unused item on Donedeal.
    I contacted canyon and they don't see a problem.
    They recommended me this

    https://www.chainreactioncycles.com/mobile/ie/en/fsa-pf30-road-bottom-bracket/rp-prod117849

    That shouldn't work on a BB86 bike

    https://wheelsmfg.com/bb86-92-tech

    https://wheelsmfg.com/pf30-tech

    Check out the frame shell inner diameters

    Welcome to Bottom Bracket hell :-)


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    #9
    sann
    Registered Users Posts: 338 ✭✭sann


    nilhg wrote: »
    That shouldn't work on a BB86 bike

    https://wheelsmfg.com/bb86-92-tech

    https://wheelsmfg.com/pf30-tech

    Check out the frame shell inner diameters

    Welcome to Bottom Bracket hell :-)

    Well spotted. I got back on to them and they gave me link to a different one.
    To be honest. I don't have much confidence in the Canyon cust care advice
    I think it's time to flog it.
    Pity cos it looks the dogs bollox on the bike and seems super light.


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    #10
    sann
    Registered Users Posts: 338 ✭✭sann


    sann wrote: »
    Well spotted. I got back on to them and they gave me link to a different one.
    To be honest. I don't have much confidence in the Canyon cust care advice
    I think it's time to flog it.
    Pity cos it looks the dogs bollox on the bike and seems super light.

    This is the one they are linking me to now.

    https://www.c-bear.com/en/products/pressfit-bb86bb92-rotor-30-fsa-evo386392-clavicula-srm-origin-sram-quarq-dzero


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    #11
    ED E
    Registered Users Posts: 36,164 ✭✭✭✭ED E


    Yikes, that price tag.


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    #12
    tuxy
    Closed Accounts Posts: 14,983 ✭✭✭✭tuxy


    €98.00

    https://www.bike24.com/p2228901.html

    I'd still be reluctant to convert from a BB standard that is known to be reasonably reliable to one that is probably less reliable.


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    #13
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    sann wrote: »
    This is the one they are linking me to now.

    https://www.c-bear.com/en/products/pressfit-bb86bb92-rotor-30-fsa-evo386392-clavicula-srm-origin-sram-quarq-dzero



    That looks the job OK, as long as you can swallow the price, it's hard to tell from the info given but it looks like it has bearings with 2 rows of balls so should be durable.
    ED E wrote: »
    Yikes, that price tag.

    Getting out of Hell has a price......


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    #14
    sann
    Registered Users Posts: 338 ✭✭sann


    tuxy wrote: »
    €98.00

    https://www.bike24.com/p2228901.html

    I'd still be reluctant to convert from a BB standard that is known to be reasonably reliable to one that is probably less reliable.

    Ya. Decided to sell it on and go with Dura ace


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    #15
    sann
    Registered Users Posts: 338 ✭✭sann


    This is the chainset if anyone is interested.
    http://www.adverts.ie/17827226


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    #16
    Daroxtar
    Registered Users Posts: 4,319 ✭✭✭Daroxtar


    Correct me if I'm wrong but I'm fairly sure bb386evo is compatible with all PF30 bottom brackets. My bike is bb386evo an I've switched over and back between standard ultegra (24mm) and fsa(30mm), just had to use little adapters, about €10, when switching to the ultegra


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    #17
    Eamonnator
    Registered Users Posts: 6,561 ✭✭✭Eamonnator


    sann wrote: »
    Ya. Decided to sell it on and go with Dura ace

    Good call.

    I bought one of those a few years ago, thought it was great value, looked good, very light.
    It lasted about six months, before it packed in.


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    #18
    sann
    Registered Users Posts: 338 ✭✭sann


    Eamonnator wrote: »
    Good call.

    I bought one of those a few years ago, thought it was great value, looked good, very light.
    It lasted about six months, before it packed in.

    When you say packed in. Did bearings collapse or what. In 2 minds again. Met a guy at league race tonight who has fitted something similar with no issues.
    Plus I would prob take a hit selling it on now. The hit would prob cover the BB price


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    #19
    Eamonnator
    Registered Users Posts: 6,561 ✭✭✭Eamonnator


    @sann
    The threaded sleeves for the pedals on both cranks failed. Play developed in each of them.
    I was unable to solve problem.
    A mate of mine had this chainset, his left crank kept loosening. He was unable to solve problem.


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    #20
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    Daroxtar wrote: »
    Correct me if I'm wrong but I'm fairly sure bb386evo is compatible with all PF30 bottom brackets. My bike is bb386evo an I've switched over and back between standard ultegra (24mm) and fsa(30mm), just had to use little adapters, about €10, when switching to the ultegra

    You're right it is, it's just that PF30 isn't compatible with the OP's bike


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    #21
    sann
    Registered Users Posts: 338 ✭✭sann


    Eamonnator wrote: »
    @sann
    The threaded sleeves for the pedals on both cranks failed. Play developed in each of them.
    I was unable to solve problem.
    A mate of mine had this chainset, his left crank kept loosening. He was unable to solve problem.

    Appreciate the feedback but are they not issues with the actual chainset and not the BB?


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    #22
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    tuxy wrote: »
    €98.00

    https://www.bike24.com/p2228901.html

    I'd still be reluctant to convert from a BB standard that is known to be reasonably reliable to one that is probably less reliable.

    The bike 24 c-bear above is a standard bb86 for 24mm shaft chainsets, probably better bearings than what's in the OPs bike at the moment but essentially the same
    sann wrote: »
    When you say packed in. Did bearings collapse or what. In 2 minds again. Met a guy at league race tonight who has fitted something similar with no issues.
    Plus I would prob take a hit selling it on now. The hit would prob cover the BB price

    The c-bear for 30mm chainsets should work ok and be more durable than cheaper alternatives, it's up to you to decide if the hassle is worth it.


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    #23
    sann
    Registered Users Posts: 338 ✭✭sann


    nilhg wrote: »
    You're right it is, it's just that PF30 isn't compatible with the OP's bike

    Canyon said pf30 and bb30 are the same?????


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    #24
    nilhg
    Registered Users Posts: 5,117 ✭✭✭nilhg


    sann wrote: »
    Canyon said pf30 and bb30 are the same?????

    bb30 bearings fit directly into the frame, pf30 are in plastic cups so creaking should be less, the dimensions are the same internally so you can use similar chainsets, but your bike is bb86?


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    #25
    Eamonnator
    Registered Users Posts: 6,561 ✭✭✭Eamonnator


    sann wrote: »
    Appreciate the feedback but are they not issues with the actual chainset and not the BB?

    Yeah.
    Sorry.
    I'll get my coat.


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    #26
    sann
    Registered Users Posts: 338 ✭✭sann


    nilhg wrote: »
    bb30 bearings fit directly into the frame, pf30 are in plastic cups so creaking should be less, the dimensions are the same internally so you can use similar chainsets, but your bike is bb86?

    The only reason I said it was Bb86 in the original message was because the bottom bracket seems to be 86mm wide.
    Maybe I put people on the wrong line of thought with this


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    #27
    Daroxtar
    Registered Users Posts: 4,319 ✭✭✭Daroxtar


    OK, so if your bike has bb86 then you definitely need that adapter to run the FSA. FSA cranks are 30mm spindle whereas the bb86 was designed specifically for shimano 24mm spindles. I'd be inclined to go with the DA cranks in that case.


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    #28
    sann
    Registered Users Posts: 338 ✭✭sann


    Daroxtar wrote: »
    OK, so if your bike has bb86 then you definitely need that adapter to run the FSA. FSA cranks are 30mm spindle whereas the bb86 was designed specifically for shimano 24mm spindles. I'd be inclined to go with the DA cranks in that case.

    Canyon have confirmed that i currently have a shimano BB 72 - 41B PF 86.

    I changed my mind again last night and went and ordered the C bear linked above on bike 24.
    When i got shipment confirmation I spotted it was for a 24mm spindle. Doh!!!!
    My own fault. Should have double checked it.
    It's on the way now, so i will just return it.
    Wont be able to fork out for the right one till I get refunded.
    And the down side is the 30mm is more expensive.


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    #29
    sann
    Registered Users Posts: 338 ✭✭sann


    Canyon came back today to me and confirmed they see no problem what so ever with the Fsa crank.
    They did how ever give a different reccomendation.
    This.
    https://www.wiggle.co.uk/rotor-pressfit-4130-bottom-bracket-steel/?lang=en&curr=GBP&dest=1&sku=5360740734&kpid=5360740734&utm_source=google&utm_term=&utm_campaign=Shopping+-+All+Products&utm_medium=base&utm_content=mckv|ssR2w6YUC_dc|mcrid|295292317327|mkw||mmt||mrd|5360740734uk|mslid||&mkwid=ssR2w6YUC_dc&pcrid=295292317327&prd=5360740734uk&pgrid=58852352866&ptaid=pla-522561790471&gclid=EAIaIQobChMI3uaMxv2i4gIVh6ztCh1O9wJ8EAQYAyABEgJEBvD_BwE


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    #30
    JimmiesRustled
    Registered Users Posts: 290 ✭✭JimmiesRustled


    sann wrote: »
    Canyon came back today to me and confirmed they see no problem what so ever with the Fsa crank.
    They did how ever give a different reccomendation.
    This.
    https://www.wiggle.co.uk/rotor-pressfit-4130-bottom-bracket-steel/?lang=en&curr=GBP&dest=1&sku=5360740734&kpid=5360740734&utm_source=google&utm_term=&utm_campaign=Shopping+-+All+Products&utm_medium=base&utm_content=mckv|ssR2w6YUC_dc|mcrid|295292317327|mkw||mmt||mrd|5360740734uk|mslid||&mkwid=ssR2w6YUC_dc&pcrid=295292317327&prd=5360740734uk&pgrid=58852352866&ptaid=pla-522561790471&gclid=EAIaIQobChMI3uaMxv2i4gIVh6ztCh1O9wJ8EAQYAyABEgJEBvD_BwE

    I've used that rotor BB with a bb386 crankset into a bb86 frame with no installation issues. The one major issue here that no one seems to have mentioned is the fact that the distance between inner and outer bearing race is tiny.

    The life of those bottom brackets, from personal experience as well as working with bearings, is awful due to this very small distance.


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    #31
    tuxy
    Closed Accounts Posts: 14,983 ✭✭✭✭tuxy


    JimmiesRustled wrote: »
    I've used that rotor BB with a bb386 crankset into a bb86 frame with no installation issues. The one major issue here that no one seems to have mentioned is the fact that the distance between inner and outer bearing race is tiny.

    The life of those bottom brackets, from personal experience as well as working with bearings, is awful due to this very small distance.

    Was that not covered here or is there more than one issue with this type of adapter?
    nilhg wrote: »
    OP, while the adaptor above will work personally I'd be slow to go that direction, those bearings are very compact for the load.

    Hambini is one of the bike tech commentators I'd give credence to, have a look at his comment here,

    https://weightweenies.starbike.com/forum/viewtopic.php?t=154186#p1441682

    and subsequent replies
    Hambini wrote:
    Even if your bottom bracket doesn't creak. You will get significantly reduced bearing life and stiffness. The load rating for a 4130 bottom bracket is ~25% of that of a bottom bracket that uses 6806 bearings (BB30/PF30/BB386)

    If you have the option, I would consider a different crankset. Shimano deliberately designed BB86 to stop people using 30mm cranksets


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