Fast Facts for April 16-18

Race:

NASCAR Sprint Cup Series, Race No. 8, Samsung Mobile 500, Sunday, 3 p.m. ET, TV: Fox, Radio: PRN;

NASCAR Nationwide Series, Race No. 7, O'Reilly 300, Saturday, 3 p.m. ET, TV: ESPN 2, Radio: PRN

Track: Texas Motor Speedway, a 1.5-mile oval in Fort Worth. Tex.

Tire: Goodyear Eagle Speedway Radials

Number of Tires:

Sprint Cup: Left-side – 1,500, Right-side – 1,500;

Nationwide: Left-side -- 575, Right-side -- 575

Tire Codes: Left-side -- D-4392; Right-side -- D-4398

Tire Circumference: Left-side -- 87.1 in.; Right-side -- 88.2 in.

Technical Inspection Inflation:

Left Front -- 30 psi; Left Rear -- 30 psi;

Right Front -- 50 psi; Right Rear -- 47 psi

Minimum Recommended Inflation:

Left Front -- 23 psi; Left Rear -- 21 psi;

Right Front -- 49 psi; Right Rear -- 45 psi

Estimated Pit Window: Every 50-55 laps, based on fuel mileage (Sprint Cup).

Notes: Teams in both the NASCAR Sprint Cup and Nationwide Series will run the same combination of left- and right-side tires at Texas this weekend . . . this is the first time teams have run either of these two tire codes . . . compared to the tire set-up NASCAR teams ran at Texas in 2009, this left-side tire features a new construction, mold shape and compound to offer more grip, while this right-side tire features a new construction that brings it in line with what has been run at Las Vegas and Charlotte and a new compound to improve wear . . . this tire combination came out of a Goodyear tire test at Texas this past January 19-20 . . . teams and drivers participating in that test were the No. 2 Penske Racing Dodge with Kurt Busch, No. 14 Stewart Haas Racing Chevrolet with Tony Stewart, No. 16 Roush-Fenway Ford with Greg Biffle and No. 83 Red Bull Racing Toyota with Brian Vickers . . . as on all NASCAR ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Texas . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.