Tires: Rotating weight vs radial construction

[ALMACK]

Originally Posted by Jeff Kempton

From the NHRA 2012 Rulebook:

"Section 10A, page 9 Stock Cars

TIRES
Street-type or drag slick tires, maximum 9-inch tread width. Tires
may not be altered from tire manufacturer’s original design or
pattern. Size of tire (new) must not exceed 9-inch wide x 30-inch
diameter (94-inch circumference). Tires may not exceed 10 inches
wide regardless of wear. Front tires must have a full street pattern
and must measure a minimum of 4 1/2 inches on ground. Tire tread
may not extend outside fender; maximum clearance between side
wall and body is 3 inches. Slicks permitted on FWD cars. All-wheeldrive
vehicles must have treaded front tires. Recapped/retreaded
tires prohibited. See General Regulations 5:1."

2 year thread revival because I am curious if anyone has tried to get a 275-60-15 tire size to pass tech in Stock ?

I am looking into running a drag radial on my T-Bird for combo races and Divisional events.

The rulebook says " Tires may not exceed 10 inches wide regardless of wear "

Is that 10" of tread pattern or 10 inches of contact patch ?