Tires are the main aim of the bill, which seeks to prohibit parts availability if there are choices that decrease greenhouse gas emissions. It amounts to a back-door fuel economy standard, which is the jurisdiction of the federal government unless you're California –and even they need a waiver. The prospect of fitting Pilot Sports to your Geo Metro will be out the window if H.B. 2186 finds traction, and it could stick you with zero alternatives based on some myopic metric like rolling resistance. Putting our legislators in charge of what equipment should be fitted to our cars doesn't strike us as the brightest idea. Hit the linked article for contact information, so you know who to call and excoriate. Thanks, Charlie!