  
 With the NT555R “Extreme Drag”, Nitto engineers succeeded in designing a DOT approved, drag racing radial tire that would outperform all other drag radials, provide impressive control and handling, and still deliver up to 15,000 miles of tread life of normal street-driving use. NT555R's are manufactured with the original tread depth of 6/32nds” and are constructed with a specially formulated soft racing tread compound to provide maximum traction. However, this soft and flexible tread will wear much quicker than tread compounds formulated for regular passenger cars. The Nitto NT555R is designed primarily for competition drag racing.
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