not allways are longer calipers needed nometimes a short reack can be middified to work if it doseng have the adjustment allready in it. look to see if your pads can drop 4 mm (a heavy 1/8th inch) if so old calipers will work no problem. if not look to see itf you can machine of file out the diffrence of the 4mm if so this will work fine as well as long as there's a decent amount of caliper left to bolt the pad to.