Joey Logano tests Next Gen car at Phoenix

The next-generation stock car for the NASCAR Cup Series is scheduled for its competition debut in 2021. On Dec. 9-10, the prototype underwent its second on-track test with a visit to ISM Raceway near Phoenix, where Joey Logano took the wheel.

The Next Gen car featured a smaller rear spoiler for the second day of testing on the 1-mile track. Logano said that team personnel and NASCAR officials tried a variety of aero packages, tire combinations and other setups in the two-day test.

The Next Gen car rounds a bend at the Arizona mile.

Joey Logano is the center of conversation with NASCAR officials and team members in the ISM Raceway garage. Among those pictured are (to Logano's left) Justin Alexander, crew chief for Richard Childress Racing's No. 3 Chevrolet. To Logano's right is John Probst, NASCAR Senior Vice President of Racing Innovation.

Joey Logano wheels the Next Gen prototype during Day 2 of testing in the desert.

The Next Gen car heads to the dogleg portion of the ISM Raceway layout, with the rear of the vehicle in clear view. Officials began testing with a larger rear spoiler on the car's deck before transitioning to a smaller blade.

Joey Logano works the Next Gen car through the curves at ISM Raceway.

The Arizona sun peers over the ISM Raceway grandstands as Joey Logano puts the Next Gen car through its paces on Day 2 of testing.

The Next Gen test car makes its entry into Turn 3 on the 1-mile ISM Raceway layout.

Joey Logano navigates the ISM Raceway garage area with the Next Gen car.

Team Penske driver Joey Logano, fresh from the NASCAR Awards in Nashville, buckles into the Next Gen test car. The prototype was also used in an October test at Richmond Raceway, with Austin Dillon driving.

Joey Logano powers the Next Gen test vehicle to the start-finish line on the first day of testing.

The Next Gen test car heads back to the ISM Raceway garage.

A solid view of the right side of the Next Gen car, showing the new larger-profile wheels and a glimpse at the body. For the Richmond test in October, the car wore a busy, zebra-patterned wrap as a camouflage.

The Next Gen test mule gets a push in the ISM Raceway garage.

Joey Logano navigates an upper lane with the Next Gen test car on Day 1 of the two-day test.

"Next Gen" branding hangs on the door of the testing prototype.

Joey Logano makes the grandstands a blur on the opening day of Next Gen testing at ISM Raceway.

The Next Gen test car sits ready for a day of on-track work in the ISM Raceway garage.

A look at the left side of the Next Gen testing prototype as it sits in the ISM Raceway garage area.

The Next Gen car makes laps with 2018 series champ Joey Logano guiding the way at the 1-mile Arizona track.