Technical & Reference Section > Tech and Restoration

wobbly crank

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oldtired:
got an old set of Profiles that have gone wobbly , they're nipped up tight on the spindle so no sideways movement on the BB, but as you crank round you can feel em move forward, :(   not much, feels like probably one notch on the spline , never had this with a splined crankset before ?  took em to bits and all the splines on the spindle and the crank arms look fine, no damage ,  anyone had this before?   spindle must of shrunk in the wash  :LolLolLolLol:  

Gary72:
Are you sure it's not movement in the pedal?
I would have thought that if one spline is worn then the other 47 should be up for the jib.

hunterdubber:
Probably need a new spindle Jimbo ,, can be a common fault , mines gone , Wildon's gone ,both Old school gen 2b's though   :-\

swap the spindle around ( left to right ) and see if the otherside arm moves forward now ,, then you'll know it's the splines worn on one side of the spindle  :-\ relatively cheap to get a replacement 48 spline spindle

If it wobbles on rhe same side it's the arm , very bad  :( bin em

Betty:
Good old profile wobble

Check there's enough spacers could be the axle bolts are fully tightened down before the cranks are tight on the arms (axle too long)

I've had one too long, shorter axle sorted it

Or could just be worn out splines on the arms or axle, try a different axle, might be time to bin em though...  :(

My son fooked a set of mine up riding with em loose....  :knuppel2:

oldtired:
edited my post Betty sorry pal  :-[,   "no sideways movement"      there is about 1.5mm space between the end of the spindle and the crank bolt face so don't think the axle is to long ? always run my cranks with a similar gap ,  

 anyone got  a close up picky of a the splines on a spindle so i can have a gues at if mine look worn or not , was just wondering if they have been rusted up and then cleaned up before i got em ? making the splines a bit smaller

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