Symptoms
- One pedal feels different from the other
- Motion feels jerky instead of smooth and elliptical
- Clunking at a certain point in the stride
- Pedals feel like they hesitate briefly each cycle
Likely causes
- CommonWorn or flat-spotted roller wheelsThe wheels that guide the pedal arms along the ramp can develop flat spots from resting in one position for long periods.
- CommonLoose linkage boltsThe many connecting rods and pivots can loosen and cause a slight hitch in the stride.
- PossibleDebris in the ramp trackDust or small objects in the track can cause momentary catching.
- Less commonWorn flywheel bearingA failing central bearing can make the whole stride feel uneven.
What to do
- Push the pedals through a slow, full stride by hand (machine off) to feel where any hesitation occurs.
- Check and tighten all visible linkage and pivot bolts on both sides.
- Wipe out the ramp track where the roller wheels travel to remove dust or debris.
- Compare the roller wheels on each side visually for flat spots or uneven wear.
- Lubricate pivot points with a manufacturer-approved lubricant if joints feel dry.
- Pedal at a slow, controlled pace after adjustments to see if the unevenness has improved.
- If a specific roller wheel shows a flat spot, it likely needs replacement to smooth the stride.
Tools and parts
- Wrench or Allen wrench set
Elliptical roller wheelsSearch: “elliptical ramp roller wheel replacement”
When to call a pro
Call a technician if tightening and cleaning don't fix the unevenness, since a roller wheel or bearing likely needs replacing.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.