Only the front are tight, I've done approximately 1000ks since replacing the front pads which are standard ferodo pads and not heavily sintered. They started to become tight about 150ks ago half way through a fairly long off road ride. I did lay the bike over during the ride but there does not appear to be any damage and the rotor and Caliper appear to be straight. I flushed the fluid yesterday to see if this helped but still no change, It feels as if the brakes have been bled too well if that makes sense.