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Old 06-23-09, 11:46 AM
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TwinCam
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you can mix and match shimano and sram all the way up and down their lines.

here's what to what for as far as compatibility:

google "freehub vs freewheel" and find out whick one you have.

ditto "chainring bcd" and find out which ones you have. you just need the chainrings.

chains come in different widths. you can use "8 speed" chains as they are the same width as 7.

the chainrings you shop for may be described as "9 speed" but that is okay they will work fine.

this is your chance to ubgrade to 8 or 9 speed if you so choose. the only extra piece you will need is a rear shifter (not a derailler, they are universal) to go with an 8 speed cogset. or 9speed cogset and chain.

you will need special tools to remove the cogset and crankarm. they are available at any bikeshop.

i highly reccommend getting any bike maintenance book. the smaller the better becasue honestly there's not much to it. there's alot of little tricks tho and having a book that you can pick up and quickly refer to is invaluable.
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