Lots of guessing here I can see
I have been running the slicks in 125/70 SC3 for the front and 200/65 SC2 or SC1 in the back this season.
I had to get new warmers as the front did not fit with regards to the very small distance between the (extremely crazy) location of the brake line fixation.
Was running some cheap China model warmer and the upgraded Alpha I got was much thinner.
One thing to take care of is that the brake line fixation under the fender looses and then rubbs against the wheel, I know of one nasty accident due to this...
Another thing I did was to move the ABS connection line to the outside of the fender.