Any advice gratefully received...
If I hold the end of the cranks arms I can push and pull them and there is sideways movement of around 2mm. The movement is even, I can pull on one arm and the other will move. It is not flex in the arms. The chainset seems to pivot slightly through the BB. It creaks and I can make it creak by doing just this by hand in the workstand.
- Focus Izalco Max Disc - 18 months old
- Chris King PF30 30mm - installed from new. 4 season UK use. maybe 15000km
- Rotor InPower 3D+ 30mm axle - 3.5 years old.
- To properly isolate this creak I went through all the usual suspects cleaning, greasing or replacing for wear; through axles, chainring bolts, chainring/spider interface, saddle rails, saddle clamp mechanism, seat clamp, pedals, pedal threads, rear freehub replaced and other bearings checked, cassette replaced, chain replaced, cleats checked, shoes checked.
- I stripped and cleaned chainset. Pulled and refit BB.
- There is no lateral play through the BB. Preload nut tightened correctly. Overtightening does not solve the problem.
- Bearings run turn smoothly in BB, no grinding.
- If I assemble the chainset arms+axle outside of the bike there doesn’t appear to be any play in the axle/arm interface.
- There is a slight bit of wear to the anodising on the chainset axle but doesn’t look structural. Doesn’t feel worn when running a finger over.
Next steps:
- Measure chainset axle for wear.
- Replace Chris King plastic bearing spindle sleeves - maybe the plastic has worn/ovalised.
Any thing else before going nuclear and replacing the BB and (hopefully not) the power meter?
Help diagnose play in chainset/BB
Moderator: robbosmans
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