Hi, I have to order two new tires for my XS2 to continue my rebuild. I will order two Bridgestone/Firestone Spitfire S11. I have a question about the rear tire. The stock size is 110/90-18. I would like to go to a 120 or a 130 tire. I just want something a little bit wider than the stock size. Is there someone who try this on their bike ?