I am replacing the front axle on my Monterey trike because the threads on the original axle are stripped.

The cups use ten bearings [5/32”?], so I’ll replace them. The replacement axle is the same size diameter [3/8”] and same thread [26 TPI] but about 1.5” longer [7” vs. 5.5”]. I believe I ordered the wrong axle, so I’ll check my LBS for a shorter one.

I’ve never replaced an axle, but watched videos on the Internet. I think the required tools are:

1) cone wrench [13 mm for cones]

2) open end wrenches [15 mm for wheel to fork fastener and 17 mm for lock nuts]

3) grease.

I removed the tire and damaged axle. What I have left to do:

1) Pack cups with grease.

2) Evenly space ten bearings on each side.

3) Secure the cups with cones.

4) Clean up excess grease.

5) Tighten lock nuts against cones.

6) Secure wheel to fork with fasteners.

‘Am I missing any steps? Or any helpful tips…

Thanks,



cup in hub


wheel on bike


damaged axle and longer replacement


Patrick