I have that tire on my ST13,,, and chose it specifically because I wanted the "A" spec tire,,, which is not available as an Angel GT in our stock size. No discernible difference in performance. Speedo was already off by 3 or 4%,, so .75% more error was not a factor. This tire has met my expectations,,, and I feel the "A-spec" is a must have. I think, imho, it is one of the top 3 rear rear tire choices out there, for this bike. It's wear rate has been very good,,, but it is still too soon for me to say if it is excellent,,, as I am only about 2/3 done. But wear is looking very good at this point. I should also say,, that I "expect" excellent performance from premium priced tires. Cheers,, Cat'
I was ordering tires for my bike yesterday and noticed a 180/55ZR17 Pirelli Angel GT. How much would this change the gearing or speedometer?