Like i've said recently, i think there are issues with the design. When the alignment of the wheel is perfectly straight, the pully should be properly adjusted too. But as you noticed it's hard against the edge and starts to shred. I had mine warranted due to this. What i've finally done is align the wheel straight, then back off the left adjuster a few turns. The wheel is no longer lined perfectly, but it's close enough and while the belt still looks hard against the pulley flange, I know pressure is relieved. If i still see a lot of belt dust i go another turn or 2. I think this design will be tweaked in time by triumph till it's better. But for now we just have to make due with little fixes like I did.