Exercise Bike Pedals Slipping – Mechanical Causes and Repairs
Slipping exercise bike pedals can be dangerous. Learn to diagnose and fix issues with crank arms, stripped pedal threads, and bottom bracket bearings.
Identifying the Source of the Slip
Is the entire crank arm slipping, or just the pedal itself? This is the first step in diagnosis.
Fixing a Loose Crank Arm
Most crank arms are attached to the bottom bracket axle with a bolt or nut. We show you how to tighten this, and what to do if the square taper is rounded out.
Dealing with Stripped Pedal Threads
If a pedal was cross-threaded or came loose, it can strip the threads in the crank arm. This often requires a replacement crank arm.
Diagnosing a Worn Bottom Bracket
If there is play or a clunking feeling from the center of the crank, the bearings in the bottom bracket may be worn and need replacement.