I'm not sure how it goes in the USA, but, in Europe, fitting a car tire in a motorcycle voids your MC insurance and riding with voided MC insurance is illegal. So, if you're involved in an accident and it's your fault, you have to pay it all (aside from heavy fines too). You may even go to prison if you happen to kill someone.
Even having differently-sized tires voids your MC insurance in Europe, unless you modify the wheels to have the new tires fit and report it to MOT (which is an expensive affair as it's seen by the MOT as re-designing the motorcycle). So be careful with that and know what your insurance will cover if you fit a CT. Given how many people do it in the USA, I would assume there's some clause that allows for it in most MC insurance policies.
Tsukayu VTX hard bags & Tour trunk, Saddlemen touring seat with backrest, NC custom windshield, Risers, LED lightbar, Engine guard LED lights, Cobra fatty guard, Rear engine guards, Fender rail guard, Leather tank bib, Passenger floorboards, 12v socket, ISO grips WITH bar weights, Engine chrome, Triple tree cover, Shaft cover, Fenders chrome, Progressive forks & 12.5 inch shocks, All Balls mod, Chrome clock, Adjustable trunk rack