lower

I ordered some porterfield R4S brake pads from Gruppe-s a couple of weeks ago and recieved them today. Unfortunatly they've sent R4 fronts and R4S rears. The R4's are the full race spec pad.

Has anyone used these on the roads and can i mix them with R4S on the back?

biker1

Not recomended for "street" you will need to get them hot before the give the grip properly, also they are very harsh on discs.