Cheers for this , I agree the fins are a bit pointless , do you know if the material in the G02a is the same as the J02a which is the resin equivalent ?
I doubt Shimano would bother developing another resin formula unless it replaced the previous formula. Those two pads are from the same era, so unlikely to be different resins.
Cheers for this , I agree the fins are a bit pointless , do you know if the material in the G02a is the same as the J02a which is the resin equivalent ?