I just bought a ’25 Bronco Sport for the wife, so I’m new here. I was surprised that the stock tire diameter is nearly 29 inches, but the donut-spare (155/70-17) is 3 inches smaller (under 26)! I have no experience with ‘new car’ RDU / PTU function (I’m used to Traction-Lok units from the past that wear out when you mess with dis-similar diameters) – so I wonder why Ford didn’t have the donut-spare at a 155/90-17 instead. It would put the diameter much, much closer. Or a…
I just bought a ’25 Bronco Sport for the wife, so I’m new here. I was surprised that the stock tire diameter is nearly 29 inches, but the donut-spare (155/70-17) is 3 inches smaller (under 26)! I have no experience with ‘new car’ RDU / PTU function (I’m used to Traction-Lok units from the past that wear out when you mess with dis-similar diameters) – so I wonder why Ford didn’t have the donut-spare at a 155/90-17 instead. It would put the diameter much, much closer. Or a…
Mini-Spare diameter – why not 29″ or so?