Senior Member
Join Date: Aug 2009
Location: Minneapolis
Posts: 5,752
Bikes: 2022 Salsa Beargrease Carbon Deore 11, 2020 Salsa Warbird GRX 600, 2020 Canyon Ultimate CF SLX disc 9.0 Di2, 2020 Catrike Eola, 2016 Masi cxgr, 2011, Felt F3 Ltd, 2010 Trek 2.1, 2009 KHS Flite 220
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I can get nearly 5000 miles on Conti 4 Seasons tires, in the rear. And even then, they are probably still rideable and safe - but they have a pronounced flattening to their profile. Front tires can go for even further unless there's some horrendous puncture, like a big nail.
The same with Gatorskins, though I don't use them so much anymore.
GP4000s - maybe not quite as much, but if I'm lucky, pretty close.
I don't have enough miles on my GP5000s to know - I just started running them earlier this summer, and that bike has maybe 2500 miles - they look fine so far.
Lots of chip seal here and of course, tons of pot holes.