firebolts= 200/50 R17
i ran a 200/50 R17 on a stock rim; 190/55 R17 is 4.5mm to much (rubs on swingarm).
i think lightings;uly's u can do a 55, better check though
100mm is max on stock rim with firebolt, 104.5mm(190/55 R17)is too much so,,,
if u have a 240/40 R17 tyre on a firebolt it will clear the swingarm but will barely clear the belt