Read brake pads tight on disk from squeezing rear brake with

pseymour Posts: 194
edited September 2010 in MTB beginners
On receipt of my new bike, I squeezed the rear brake with the rear wheel removed. Brake pads locked and I couldn't open them again. I carefully squeezed them open with 2 screwdrivers, enough to get the rear wheel back on. But the pads now drag horribly on the disk. Is the best thing to do is to remove the rear wheel again and prize them open even more? or is there a better way. Brakes are Avid Elixir 5.

Any advice is well appreciated as I need to get on the bike!

Giant Anthem X3
Giant Anthem X3 2010.