This is the first time NASCAR Camping World Truck Series teams have run either of these two Goodyear tire codes . . . compared to what was run at Iowa last season, this left-side tire (D-4546) features a mold shape change, while this right-side tire (D-4562) features a construction change to bring this set-up in line with what is run at similar tracks, as well as a compound change for better wear . . . NASCAR Nationwide teams ran this same left-side tire at Iowa in May, though this is a different right-side tire . . . as on most NASCAR ovals one mile or less in length, teams will not run inner liners in their tires at Iowa.(Goodyear PR) [Complete tire specs are posted on the Iowa Race page.](7-13-2012)
