Can the XT6 directly switch to 255 tires?
2 Answers
It can be directly switched as long as it does not affect normal driving. Below is the relevant introduction: Cadillac XT6: The Cadillac XT6 incorporates the forward-looking design language of the ESCALA concept car, offering the first and only "2+2+2" three-row six-seat layout in its class. It is also equipped with Smart-Propulsion intelligent drive technology, Bose-Performance premium sound system, intelligent matrix LED headlights, and the latest generation of mobile connectivity experience CUE, among over 35 standard technological features. Body Dimensions: The Cadillac XT6 has a body length of 5056 mm, a width of 1964 mm, a height of 1780 mm, and a wheelbase of 2863 mm.
I've researched tire modifications for many years, and fitting 255 tires on the XT6 is indeed feasible but depends on specific configurations. The factory wheel width typically ranges between 7.5-8.5J. If the wheel's J-value is 8.0 or above, it can accommodate 255 tire width. The most critical factor is verifying the change in tire outer diameter. The original 235/55R20 has a diameter of approximately 76 cm, and I recommend switching to 255/50R20 with a 78 cm diameter, keeping the error within 3% to avoid interfering with the speedometer and ABS system. Before actual installation, it's essential to test whether the tire sidewall rubs against suspension links during full-lock steering. I've seen cases where people didn't measure properly and ended up grinding the wheel arch liners when going over bumps. Also, pay attention to the wheel's ET value - excessive negative offset increases suspension load. It's best to take your wheel specifications to a professional modification shop to calculate the fitting solution, as safety should never be compromised.