yu need a sprocket wrench, for shimano , and the other sprocket that you have on the bent wheel, might not not work because you will get chain jumps" because the chain that you have on the bike now is worn down , and will slip on that other sprocket, can you take it to a bike shop or a friendly bike club , the lads there might take the sprocket off for you if you ask them , they do it all the time with their bikes for raceing , they can very hard to get off ,
mick, July 2008
