'Teen Mom 2' Star -- Driving Recklessly Before Fiery Crash ... Cops Say

"Teen Mom 2" star Adam Lind was driving recklessly on a revoked driver's license when he plowed his Corvette into a car driven by an 87-year-old woman ... cops tell TMZ ... but they say drugs and alcohol were NOT a factor.

Witnesses tell us ... Lind was driving VERY fast Friday when he slammed into the elderly woman's car as she was making a left turn. Lind was pulled from the wreckage of his 'Vette moments before it burst into flames.

Cops in Sioux Falls, SD tell us Lind has been charged with a total of five crimes -- in addition to the reckless driving and revoked license charges, he's also been cited for driving with a suspended license, driving an unlicensed vehicle, and not having insurance.

But law enforcement tells us ... there's NO evidence that booze or drugs contributed to the crash.