Tire break-in miles?

MagmaRed370z

500 miles to "Fully" break them in.

dP3NGU1N

No no no. This is for street tires. Do not confuse street tires for R comps (which are sometimes street legal if they are DOT approved)

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BGTV8

This is road tyres in normal DD .. it takes somewhere between 100 and 500 miles to scrub off the mould release agent used during manufacture and also a few heat cycles for the structural changes in the rubber polymers to be activated for best tyre life (road tyres are not optimised for grip - their primary optimisation is for life and that means resistance to heat cycling).

Race (or semi-race which is the R888) as pointed our earlier in this thread require a different process which is basically put the tyre through a heat cycle for the polymerisation to occur and then scrub the tread surface to get rid of the release agent and you have best possible grip - R-Specs and slicks "only" get worse (lose grip) thereafter.

You guys in the USA are lucky in that Tyre Rack will do the heat cycle for you.