what do you mean doesnt fit? is the thread wrong, is it the wrong diameter? need to be more specific
easiest way is to follow this guide: http://www.sheldonbrown.com/gloss_bo-z.html#bottom
if it doesnt fit, you need to find what type will fit and buy that one. i cant help much more without more information. good luck
@chriscofferson started
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what do you mean doesnt fit? is the thread wrong, is it the wrong diameter? need to be more specific
easiest way is to follow this guide:
http://www.sheldonbrown.com/gloss_bo-z.html#bottom
if it doesnt fit, you need to find what type will fit and buy that one. i cant help much more without more information. good luck