Westbound I-70 approaching the Eisenhower Tunnel. Photo: formulanone, CC BY-SA 2.0.
Snow tires alone don't satisfy the law for 2WD vehicles.
Bald tires fail no matter how good the drivetrain is.
Renters must comply even if the contract says otherwise.
Figures vary by source, check codot.gov before you drive.
Why 2WD cars still need chains, and what AWD/4WD gets instead.