Elkhart Lake, Wis. – Max Riddle and his Aston Martin led GTS practice from Elkhart Lake’s Road America at the Pirelli World Challenge Grand Prix of Road America presented by Cadillac. The weekend features Rounds 11 and 12 of the GTS season. Weather conditions for practice were cloudy with temperatures in the high 60s.

Championship points leader Lawson Aschenbach, in the No. 10 Blackdog Speed Shop Chevrolet Camaro, set the pace at the 14-turn, 4.048-mile circuit with a time of 2:19.467 early in the session.

Derek DeBoer, in the No. 09 TRG-AMR BRM Chronographes/Rebounderz/Rohnert Park/Racing for Cancer/Pirata Della Strada/Simon Ward Aston Martin Vantage GT4, was second quick in the early going with a time of 2:19.593.

Then it was DeBoer’s teammate Riddle, in the No. 07 TRG-AMR Adobe Road Winery, LaSalle Solutions Aston Martin Vantage GT4, going to second place with a time of 2:19.517. Riddle is coming off a strong weekend at Canadian Tire Motorsport Park, where he won in Pirelli World Challenge competition in May.

Aschenbach then found more speed around the track, lowering his time to 2:18.964, while Milwaukee’s Jeff Courtney, in the No. 99 JCR Motorsports RecStuff.com/Kenda Maserati GranTurismo, jumped to fourth ahead of Parker Chase, driving the No. 19 Performance Motorsports Group Ginetta GT4, in fifth and, Brett Sandberg, in the No. 13 ANSA Motorsports KTM X-Bow GT4 in sixth at the ten-minute mark of the session.

At the halfway point in the session, Aschenbach’s third timed lap was still the mark to beat at 2:18.964, but Riddle had improved his second-place pace down to 2:18.969. Completing the top five mid-way through the 30-minute practice were Courtney, DeBoer and Sandberg.

Times picked up, however, with DeBoer going fastest at 2:18.572 and Courtney jumping to second at 2:18.737, with both of those drives eclipsing Aschenbach on the practice time sheet.

Aschenbach then responded with a strong showing of outright pace, bringing quick time down to 2:18.247, three tenths up on DeBoer, who was followed by Courtney, Riddle and Chase with eight minutes remaining in the practice session. Three minutes later, Riddle bested Aschenbach by .024 seconds, going to first with a quick lap of 2:18.223.

That time would stand up, as the session came to a slightly early stop for a stranded car of course, with Riddle setting the best time ahead of Aschenbach, DeBoer, Courtney and Chase with the checkered flag out.

Sandberg followed in sixth, with Ernie Francis Jr., in the No. 98 Breathless Racing Breathless Racing/Beta Tools/Liquid Performance Ford Mustang in seventh and Scott Heckert, in the No. 54 Racers Edge Motorsports SIN R1 GT4, in eighth ahead of Anthony Mantella, driving the No. 8 Mantella Autosport Inc. Gulf KTM XBow GT4. Completing the top ten was Bill Ziegler, in the No. 9 ANSA Motorsports KTM X-Bow GT4.

GTS teams and drivers next hit Road America for Round 11 qualifying, scheduled for Friday at 5:15p.m. Central. Live timing is available on world-challenge.com.