Quote:
Originally Posted by jchammond
What’s the DH on those tires stand for 
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Hard compound ... Endurance spec tyre. They are durable enough for a 1-hour stint. At this years Bathurst 12-hour GT race, some teams double-stinted as that was quicker than touring the pits, and changing tyres, but they were proper shagged after 2 hours.
DM is medium and DS is soft
DH will take around 2 laps to get enough heat to generate good grip and will be skatey whilst they warm up.
I looped my race car on the out/warm-up lap when I first put Pirelli's on the car - scared the cr4p out of me how quickly the car got away from me (used to SS12 - medium - compound Japanese Dunlops).
Take it easy to get them hot enough to grip, OR find a source of DM.
I have used the TCR tyre which is a 270/650R18 in Medium to good effect (TCR is the 2 litre FWD touring car series - not sure if it is in the US yet).