XPedition 2.0 motor making grinding/scraping sound
I'm hoping someone here might have some insight into an issue I'm having with my XPedition 2.0
For the last few weeks, I've noticed the motor getting a little noisier than normal when riding with my two kids on the back. The bike still worked great and the extra noise was minor, so I wasn't too concerned.
That changed yesterday.
A car ran a stop sign and I had to do a full emergency stop. No accident and nobody got hurt. But, immediately afterward I started noticing a much more pronounced noise from the bike.
At low speeds and under heavy load (typically when over 600 watts), I hear a scraping/grinding sound and can actually feel something that almost feels like it's dragging on the ground. My first thought was that I warped a brake rotor or somehow damaged a rear caliper during the hard stop.
What's strange is that once I get up to speed, or when the bike isn't under as much load, the sound gradually goes away.
I also did a quick test with the rear wheel off the ground and the kickstand up. When I spun up the motor with no load on it, everything sounded completely normal. No scraping, grinding, or unusual noises at all.
So does this sound familiar to anyone? If so is this something a reasonably handy DIYer could fix?