i was wondering, what size tool i need to take off the front caliber, to change the brakes

 

Medium size.

Look inside the brakes towards the outside. There are two hex bolts. One on top, one on bottom. Those have to be removed and your brakes are apart. A rachet and socket that fits the bolt is the best. When repacing, coat the threads with anti-sieze.

 

You need a c-clamp and a 3/8 hex socket. That works the best.