replacing middle chainring
I've just replaced my chain and am now experiencing some serious chain suck in the middle ring - its over 12 months old put in a good service and is knackered. Rear shifting is fine in all other gears. I can't get the bloody thing off without removing the crank arm - i am loath to pay for this at a bike shop so how easy is it to remove the crank arm without tinkering with the BB? Any decent websites for simple instructions and tools for this?