Have you removed the bolt/nut which holds the cranks to the bottom bracket axle? If the answer is yes, flickwg's advice is sound. Make sure the crank puller is threaded on absolutely as far as it will go, then step up and be prepared to give it a bit of wellie. It sometimes helps if a friend holds the bike for you.
Have you removed the bolt/nut which holds the cranks to the bottom bracket axle? If the answer is yes, flickwg's advice is sound. Make sure the crank puller is threaded on absolutely as far as it will go, then step up and be prepared to give it a bit of wellie. It sometimes helps if a friend holds the bike for you.