I was changing my pads today and I had alitlle problem with my rear breakes, to be exact i was not able to remove the upper bolt which holds the pads, it looks like its inside some kind of tube and i was not able either to remove it or get to it, if anyone have done it before plese help, if not then think with me.

I'm having a hard time identifying that general area. As far as I can remember there are 3 13mm hex bolts that hold the caliper in place. That sorta looks like the caliper piston, however you must use a special tool to reset the piston. DO NOT use a C-clamp, you need the caliper piston tool. $17 CDN at Canadian Tire.

One size fits all? or there is a particular size for it?

Its a cube shaped tool, goes at the end of a square head tool (straight ratchet tool), it has 8 different piston caliper options, find the one that fits and slowly turn the piston back into its reseat position...can be a PITA

first, you dont need the cube

i bought the cube, and it didn't match up, i cant remember what i used though....screwdriver maybe? i had somthing that could fit in the slot (rear calipers TURN in, not push in)

you only need to remove one of the bolts, take the 1 out, wrestle with it, and it will pivot enough to change out the rear pads

its that hard man do i want rear pads?

Its not that hard, if you can do the fronts you can do the rears.

In my case, we needed the cube tool and it worked just fine.