i got a huge nail in the back tire of my GT, all you have to do is, loosen the 5 lug nuts (as in just get them cracked and ready to go, easier to do with the tire on the ground), jack the bike up on the jack points under the engine, remove the 5 lugs, pull the rim away from the hub, bring the back of the tire towards you, so it ends up on a slight angle, and then just bring it out, to put it back just do the opposite, setting the jack and removing the tire, takes about 10-min, just make sure the shop knows how to deal with that type of rim so they don't trash it
