There is no reason to remove the rear wheel to change pads.
1. Locate pin that goes through the brake pads.
2. Remove clip.
3. Remove pin (Outward direction).
4. Spread pads apart, forcing pistons back into caliper.
5. Remove rattle spring and pads.
6. clean area where pads go.
7. Install new pads, and, if it fits with the new pads, if not put it with your spare parts box.
8. Install pin and clip, tab facing in.
9. pump brake lever until you have a pedal.
You also might want to move this to "Tech" to get more responses.
Great thanks! Step 7 has me slightly confused with the "if it fits with the new pads"?? Can you elaborate?
Also I guess its a tradeoff of hassle between taking the rear wheel off and having an easier time cleaning the rotor vs having a harder time getting the rotor cleaned off.