Results 1 to 6 of 6
  1. #1
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2003
    Posts
    108

    SRAM vs Shimano Spindle

    About to swap out the stock crank set. My frame uses a BB86 BB, so if I go with Shimano, i can re-use the stock BB. Am thinking about a long term group swap out to SRAM. Is there any noticeable difference in spindle stiffness between SRAM and Shimano? The SRAM uses the 'stepped' GXP BB, while the Shimano uses the 'constant diameter' spindle. Thank you in advance.

  2. #2
    Rub it............
    Reputation: frdfandc's Avatar
    Join Date
    Nov 2007
    Posts
    3,648
    Quote Originally Posted by MTBDad
    Is there any noticeable difference in spindle stiffness between SRAM and Shimano? The SRAM uses the 'stepped' GXP BB, while the Shimano uses the 'constant diameter' spindle. Thank you in advance.

    You pretty much answered your own question. (answer in bold)

    So to use the BB86 frame with a Sram crank, you will need the standard GXP crank, but have to get the correct sized bearings to be pressed into the frame.

    What is your stock crank?
    You can't fix stupid.

    Quote Originally Posted by JoeDaddio

    I kind of wish it were legal to staple people in the face.

  3. #3
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2003
    Posts
    108
    Giant Defy Advanced came stock with a FSA Gossamer Triple. I'm such a rookie road biker that my question is almost certainly moot, but... I suffer from chronic up-graditis (my MTB quiver is a testament to my illness). I am likely to swap out the stock 105 group for SRAM, but not married to the notion of a perfectly matched set-up, so if Shimano is stiffer, shifts better, whatever, I'd be happy to run a Shimano crank with SRAM Shifter/Der, etc

  4. #4
    Rub it............
    Reputation: frdfandc's Avatar
    Join Date
    Nov 2007
    Posts
    3,648
    IIRC, the FSA bearings are the same as the Shimano bearings sizing wise. So all you would have to do is remove said FSA crank, install Shimano crank of your choice, then adjust the front derailluer.

    The difference between Sram & Shimano as far as spindle stiffness goes, is non existent. The difference is in the chainrings/spider setup. A Sram is pretty good for shifting if its setup properly, but the new Ultegra & DA is tops for chainring stiffness and shifting.

    I'd personally would go with a Shimano Ultegra crank (6700 series) and then make a choice on the rest of the components.
    You can't fix stupid.

    Quote Originally Posted by JoeDaddio

    I kind of wish it were legal to staple people in the face.

  5. #5
    Moderatus Puisne
    Reputation: Argentius's Avatar
    Join Date
    Aug 2004
    Posts
    16,090
    I'm pretty sure you're right on the FSA bearings, and, yes, the SRAM ones, I belive ONE is the same, but one is different.

    The 6700 crank is pretty darn good. The 7900 one is spectacular, but, is nearly the price of an entire 105 group...


    Quote Originally Posted by frdfandc
    IIRC, the FSA bearings are the same as the Shimano bearings sizing wise. So all you would have to do is remove said FSA crank, install Shimano crank of your choice, then adjust the front derailluer.

    The difference between Sram & Shimano as far as spindle stiffness goes, is non existent. The difference is in the chainrings/spider setup. A Sram is pretty good for shifting if its setup properly, but the new Ultegra & DA is tops for chainring stiffness and shifting.

    I'd personally would go with a Shimano Ultegra crank (6700 series) and then make a choice on the rest of the components.

  6. #6
    RoadBikeReview Member
    Reputation:
    Join Date
    Jan 2003
    Posts
    108
    I was all but set on the SRAm Red, but now I'm leaning towards the D/A 7950! decisions, decisions. I guess there are far worse problems to have!!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

EUROBIKE

Hot Deals

Latest RoadBike Articles


Latest Videos

RoadbikeReview on Facebook