I was pulling my brake pads out because both front and rear were squeeking - to put that anti-squeek grease on the back sides of the pads. Front pads are fine, but the rear were worn really low. I have a set of front pads from when I replaced them before that have quite a bit of pad left. They look to be the same as the rear, so I put a set in to replace the rear ones. I haven't ridden the bike yet. I've noticed on Cyclemax web site, they have different part numbers for front and rear (T61-1692 for front and T61-1690 for rear). Should I not use these 'spare' pads in the back and will there be any damage if using them until I can get a set specifically for the rear?