rear brakes sticking?

[RegisCup]

im not sure why but i think my rear breaks may be sticking slightly on the 172 cup. dont know if you guys have had anything similar and could offer ne advice on what to check? only really seems to be at low speed and worse when its cold and i suspect it may only be on 1 side..... possible slightly seezed caliper piston??:dapprove:

 

[sussex_gti]

If your confident enough, its easy enough to take apart and inspect. Try jacking the car up and spinning the wheels and see how free they are.