Among others I have a bound motor D3 which I love however a few weeks ago I started getting the dreaded “rattling sound” from one of the rear motors.

It does not appear to make the noise while I’m free spinning the motors on my work bench and with the wheels off I cannot replicate the noise at all which leads me to believe it’s not the bearings (could be wrong of course). It only happens when I’m riding. I took the wheel and motor off today to inspect and clean everything and noticed there is a tiny bit of play when I put the wheel back on. It looks like the 10 pins on the wheel adapter are very slightly worn down resulting in a very minor movement back and forth.

My question is this: is it more likely that the adapter pins are worn or the cores on the wheels?..or both. I figured new kegal core wheel adapters are the cheapest place to start as far as replacements. My clouds wheels are definitely a little worn (rubber) but I feel like they still have some miles on them.

Also, I don’t believe it’s the shaft as some others have reported as there is absolutely no play when I put the motor back on. Infact I have to hit it with a rubber mallets to get on/off as it’s pretty damn tight.

Any suggestions and/or comments would be greatly appreciated!