Stiff RF cranks

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  • Stiff RF cranks
  • Premier Icon Mr Agreeable
    Subscriber

    Have you had the frame faced?

    richc
    Member

    No, but its been used with Shimano crank before and was fine. Are RF cranks a lot more sensitive?

    Premier Icon Mr Agreeable
    Subscriber

    Quite a bit more I believe. The GF’s Evolve XC cranks are a bit tight (her frame is unfaced) but my old ones were OK (frame faced).

    richc
    Member

    bugger, better get down the LBS then. Do you need to strip the frame down to get them faced? or can they do it built up.

    Premier Icon Mr Agreeable
    Subscriber

    They can do it built up – you just need to get the cranks off and the BB out. Might be worth double-checking your bike’s BB shell width and the instructions first. I want some of those Atlas cranks, they look mustard.

    Premier Icon jim
    Subscriber

    Yep, remove one of the 1mm spacers on the axle.

    richc
    Member

    I will try a 1mm spacer, if that doesn’t help I will take it to the LBS.

    They are nice cranks mr A (i got mine with a lucky ebay snipe for not much cash ;)) but they are seriously heavy

    Premier Icon jonathan
    Subscriber

    The instructions for RF cranks cover this – see the troubleshoot bit

    Amazing eh?

    richc
    Member

    Just checking that I am not going mad here.

    I have some RF atlas cranks, and a new Acros BB, and when I do the cranks up tight enough that the bolt bottoms out on the axle (well to be honest I haven’t done it up this tight yet) the crank gets very very stiff and hard to rotate

    To fix this do I need to remove some of the spacers on the axle? or am I doing something wrong?

    richc
    Member

    Yep read them, just wanted to double check, which is never a bad thing IMHO

    Acros BB’s use an angular contact bearing. If you keep winding & winding you will crush the inner bearing race into the balls thus stopping it turning.

    The bolt is not supposed to do up against the axle.

    Tighten the steel 8mm allen key bolt up tight so the cranks can still turn freely, then screw up against it the 12mm Aluminium allen key cap to lock it all down.

    J

Viewing 11 posts - 1 through 11 (of 11 total)

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