so i just bought my fz6 , guy who sold it had just put a hypersport battlax s21 on the rear, front is min tread 1 mm centre, ive just bought battlax hypersport but bt016 front, tbh didnt see the s21 just saw batlax hypersport and ordered battlax hypersport for the front, later noticed the rear is S21 my front is a BT016. ive not fitted the front tyre yet.
just checking is it compatible?