Warm Back Rotor?

[Jack Klarich]

If it was dragging abnormally you would have no skin left were you touched & the rotor would be blue, the rotors will be pretty warm to hot after a ride and pad dust is also normal. You can jack the rear up and spin the wheel if you're concerned, if it spins freely it's ok.

What Chopper says, apply the brake and try to spin the wheel the brake should release right away, if not check for sticking caliper and check the guide pins too, try cracking the bleeder open if the brake does not release, if fluid gushes out the caliper abd or the hose could have collapsed and be holding pressure in the caliper. This is rare but it does happen, Jack