My bike's better than me!
Join Date: Feb 2005
Location: Northern Colorado
Bikes: (2) Moots Vamoots, (1) Cannondale T2000 tourer, (1) Diamondback Response Comp mtb
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Whoa there, cowboy.
Why do you think the chainrings need replacing??
How did you measure the chain for stretch?
How do the cogs look??
You may want to give the local bike shop a couple of bucks just to help you verify your findings. You may be able to get the parts cheaply there. If not, then a quick Google search for the actual parts you need ... or Jenson or Harris or Nashbar or Performance ... or any of a number of sites can sell you reasonably priced replacements.
I'd just get your assessments verified first. You could well be right, but I have a funny feeling here....