Beyond 20,000 RPM!
Rims no sifu lah.. Anyway for 6J and 6.5J to me no difference for 195 size tyres as both sizes are recommended. Only when the rims are too narrow like 5J then the tyres gets squeeze. When this happens the tyre contact surface not flat on the ground. And when the rims are too wide, say like 7.5J then the tyre sidewall gets stretched. When this happens the sidewall less flex and tyre contact surface more to the edge, meaning the shoulder pattern will wear firstmay i know pro & con using 6jj instead of 6.5jj sifu?