My rear brake never locks the rear wheel even with full pull on the lever, especially going down hill or fast. I can even pedal a bit with the brake depressed.
This is a recent issue and sometime in a ride the full braking force returns for a couple of minutes.
My pads are in a very bad condition and I've have new ones on order. My question is if they can be the reason for my problem? The bike was bought used so I don't know its history.
Front, no flash:
And the disc, which looks ok: