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Intersport debuted Kumho’s new LMP1 tire after running the company’s P2 tire in the Creation’s first ALMS race at Sebring, and the new tire has made a big difference in the car’s performance. The new tires are size 330/680R18 on the front and 370/710R18 on the rear. How big is that? Consider that the new P1 front tire is nearly an inch wider than the P2 rear tire.