Took my bike to the shop a few days ago due to my crank arms shifting side to side. Got it back yesterday and upon my initial inspection everything seemed good as the crank arms were solid with no shifting. Now about 5 minutes into my first ride with it since getting it back the entire left crank arm falls off and upon further research I’m led to believe it fell off due to these spines being damaged. Is that correct? If so what’s the proper procedure to get this fixed?
by dynemc
5 Comments
Take it back to the shop they can give you an answer on the spot. You are probably beyond “fix” and in need of “replacement”.
Procedure:
1). Get new cranks.
2). Install new cranks.
3). Have a fun ride!
Yeah I would def change the left crank arm knowing its condition. Looks like it moved around while riding and it caused the spline to wear. The spindle should not be damage since it’s steel but I would check that also.
I think you shoulda given us a better picture…. But is part of the spindle not broken off inside the crank arm. Seems like your LBS packed it full of grease and didn’t notice a crack or two?!
The spline is kaput! Can’t you see that a piece is missing?