Well, yeah its not the size you would choose to buy, but M5Bs are a good size tire for their rating(a big 100). GGs used to come with Michelin M12s in 120 size, which ran narrow. Anything looks narrow compared to the stock FIM tires which are very wide. Just run it, if anything it will break loose and spin a little easier, and not last as long. A good exercise in throttle control.
