dont need to run either now...
The new nitto nt05-r is a more agressive drag radial than the 555r which i ran last season. Theyve been out on the market about a month. Ill be using these for my circle track and road racing for the 2010 season
Treadwear: 00 Tract: B Temp: B
They perform much like the m/t et d/r, but have a stiffer sidewall aswell for road racing.
The only thing is they are only made for 17s through 20s, and they are about $190 a peice.