I just traded my new tires for my wife's tires with 40k on them. She had a nasty object (metal raptor claw?) imbedded in the tread of one that needed a plug so I made it my problem by switching. All of the tires are the same size, make and model of tire, just older and more worn. I wonder if my actual mileage go up or down?
To calculate the average smaller circumference of the worn tires I need to figure out how the car gets that information. Is it through the tranny like an automatic or is it through ABS speed sensors like it does to measure a low tire? It will be fun to see how it does with the older tires without the wheel disks on it. Less unsprung weight and shorter gearing will help me accelerate anyway
