Have a set of 615 deore brakes, had them for about 6 months no problems.
The rear I’ve noticed has very little Lever travel And the pads rub the disc.
Retracted the pads, but it returns to this after a few lever pumps.

Pads seem Ok too
Ill bleed it and see if this helps, but it did seem a bit sudden. Any ideas?

Ta

Is the caliper centred?

Actually ignore that. sounds like something else..

Yeah, I’ve adjusted and readjusted, set them with and without birzman spacers too.

Same thing.

Sounds like a sticky piston in the caliper. I had this on some Hayes Stroker Trails. Try removing the caliper from the frame and take the pads out. Clean round the pistons with a little oil. Pull the lever untill they move then carefully push them back. Repeat a few times.

Pistons are moving ok as far as I can see. Swapped pads with the front and the front is playing up similar to the back. So Pads I think.

Only look half worn to me!

Think I’ve figured this out.

oddly it’s to do with the springs. I noticed that the pistons weren’t retracting very well, so opened the spring up a bit. kinda solved the initial problem but also caused the pistons after about a minute to retract further, requiring the brake to be pumped a bit to find the bite point.

changed the pads now so all is back to normal, but thought I’d report back.