Originally Posted by
kv501
Wait until you start flatting to change them, or if you feel like it get new ones. Myself, I put a new chain, cassette, and GP4000 tires on every 3,000 miles regardless (if they all make it that long). $100 every 3,000 miles is cheap for a hobby, in my opinion.
On the same token, there are people here who will routinely get 5,000 miles on a set of tires, so your budget, and preferences will make the call. It's not a matter of safety or requirement.
If you are good about changing your chain every 3k, there should be little need to replace the cassette each time.
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'14 carbon Synapse - '12 CAAD 10 5 - '99 Gary Fisher Big Sur