If you can get the P1 for cheap, do it. Its lighter than the Shinko, so you would be able to have even better runs. Also, if you have a well prepped track, a 190/55 Pilot Power will hook well too. I like my Shinko because it was cheap and sticks real well, plus I can run plenty of pressure in it. I only use it for the strip though, change it out before I head over. It has VERY limited lean angle available. Also, the 180/55 on a 10R rim will stretch it out to have a flatter contact patch and is close enough to adding 1 tooth on the rear because of its height.
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