I wanted to pass on some knowledge that will hopefully save at least one or two people from getting mangled the way I did.
So on my Hub Motors and probably most Hub Motors, the Rubber Outwheel has a Tubular, Cylinder-like feature to it, and then it has a Disk-like feature which covers one end of the Tubular, Cylinder-like feature.
(The “Disk-like feature” of the Rubber Outwheel has a circular pattern of holes in it that the bolts pass through to hold the Rubber Outwheel on to the Hub Motor.
Check this out, the Tubular, Cylinder-like part of my Rubber Outwheel instantaneously tore off while I was riding at high speed and messed me up!
Looking at the Rear Trucks after my accident, I noticed that the Rubber Disk-like part of the Rubber Outwheel was still attached to the Hub Motor, but there was a jagged tear all around the circumference of the Disk-like part . (See Photos below)
The tear appeared to be focused around the “Circular edge” where the “Hub Motors’ Tubular, Cylindrical feature” meets the “Outer, Disk-like feature” at the End plate of the Hub motor". (This is the End-plate that the small bolts that are used to mount the Rubber Outwheels to the Hub Motors are threaded in to. )
I noticed that this Outer Edge, which is a circle with same diameter as the Outer Diameter of the Hub Motor was somewhat sharp from when it was manufactured.
Therefore, I used some sand paper to round and dull this somewhat sharp edge on my Hub Motors.
I recommend that You consider doing the same. Don’t take the edge down much at all, just make sure it is dull with a very minimal radius of like 0.5 mm perhaps.
I hope that this is understandable. You see, if you round over that semi-sharp circular edge just a little but by spinning the Hub motor while holding some sand paper against that edge for example, it will prevent that sharp edge from cutting into the inside corner of the Rubber Outwheels, which scores them all the way around the inner circumference where there is already going to be high stress.
I recommend doing this is your Rubber Outwheels are off of your Hub Motors already. However, I do not know if it is a good idea to pull the Rubber Outwheels off just to round this edge. My reasoning is that pulling the Outwheels off might introduce some amount of damage to the Rubber Outwheel depending on how you remove them from the Hub Motor. So that part is up to You to decide based on the condition of your Outwheels and the availability of replacements.
But if You are like changing your Rubber Outwheels to some new ones and your Hub Motors do not have any Outwheels on them, then You might consider at least feeling that circular edge and if it seems sharp to you, maybe sand it down a little.
That’s all for today.
Have a Good Ride everybody.