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Project STR

Tire Rack has teamed up with Grassroots Motorsports magazine to prepare a car for competition in the Sports Car Club of America’s new STR autocross class. STR, short for Street Touring Roadster, allows common bolt-on performance improvements to an otherwise stock street car, such as wider tires and wheels, suspension upgrades and an engine ECU retune. Sticky R-compound competition tires are not allowed, so we’ll be competing on “regular” street tires.

A 2010 Mazda MX-5 will serve as the foundation for the project, offering a good blend of power, handling and modest weight. The Grassroots Motorsports/Tire Rack Mazda MX-5 will compete head-to-head with similarly-prepped Honda S2000s, Toyota MR2 Spyders and other 2-seat sports cars. Tire Rack test drivers Chris “Trent” Harvey and John “Woody” Rogers will handle the parts installation, and the driving duties as they measure the performance gains on the Tire Rack test track and document their efforts during competition in select Tire Rack SCCA National Tour and ProSolo events during the 2011 season. The final test will come in late August at the ProSolo Finale and Tire Rack SCCA Solo National Championship events held in Lincoln, Nebraska.

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2010 Mazda MX5

BMW Car Club of America

Tire Rack SCCA National Solo Program

Tire Rack Street Survival Teen Driving School

Tire Rack One Lap of America

U.S. Ski and Snowboard Association

Tire Rack Track 2013 Events Calendar


Project STR 2011 Event Schedule
Dates Event Location
March 11 – 13 Dixie National Tour Cecil, GA
April 29 – May 2 Blytheville ProSolo Blytheville, AR
May 27 – 28 Spring Nationals/Lincoln ProSolo Lincoln, NE
May 29 – 30 Spring Nationals/Lincoln National Tour Lincoln, NE
July 1 – 3 Northern States Championship Toledo, OH
August 27 – 28 ProSolo Finale Lincoln, NE
August 30 – September 2 Tire Rack SCCA Solo National Championships Lincoln, NE

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