Cog and Chain wear

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I was woundering should i replace my chain after say 5000km, as it is
probably stretched, cost only $30 odd.
Then that will help reduce the wear of the cogs. as they are dearer
this will help them last longer.

Thanks

On 2007-07-12, vyaw2003@gmail.com <vyaw2003@gmail.com> wrote:
> I was woundering should i replace my chain after say 5000km, as it is
> probably stretched, cost only $30 odd.

Why not measure it and find out? All you need is a ruler.

http://www.sheldonbrown.com/chains.html

It might still be OK after 5000km depending possibly on how clean you
kept it and what gears you use the most.

> Then that will help reduce the wear of the cogs. as they are dearer
> this will help them last longer.

I think that is the idea. If you replace chains soon enough, the cogs
are supposed to last the lifetime of several chains.