What is the tire size of the Cadillac ATSL?

2 Answers
BrantleyDella
07/25/25 12:54pm
The Cadillac ATSL has two tire size specifications: 225/40R18 and 225/45R17. In 225/40R18, the first number 225 represents the tire width of 225MM, 40 indicates the aspect ratio of the tire section is 40%, meaning the section height is 40% of the width, 18 represents the rim diameter of 18 inches, and the letter "R" in the middle denotes a radial tire. In 225/45R17, the first number 225 represents the tire width of 225MM, 45 indicates the aspect ratio of the tire section is 45%, meaning the section height is 45% of the width, 17 represents the rim diameter of 17 inches, and the letter "R" in the middle denotes a radial tire. The Cadillac ATSL is equipped with Bridgestone Potenza RE050 series tires, paired with ten-spoke aluminum alloy rims, and no spare tire is provided across the entire lineup. If you want to replace the tires yourself, you can follow the steps below: Take out the spare tire and jack, place the jack under the vehicle frame of the tire to be replaced, ensuring the jack touches the metal part of the frame; Raise the jack until it supports the car, the jack should be positioned under the vehicle, check and ensure the jack is at a right angle to the ground; Remove the hubcap, loosen the nuts counterclockwise, do not fully loosen them, just enough to eliminate resistance, when loosening the nuts for the first time, keeping the tire on the ground ensures that the nuts turn rather than the tire; Turn the nuts counterclockwise until they come off, repeat this step for all lug nuts, completely remove the nuts; Place the new tire on the hub, carefully align the tire rim with the wheel bolts, install the lug nuts, hand-tighten the nuts until all nuts are hidden, at this point the tire replacement is complete. In addition to the model, the tire also has the following common data marked on it: Tire carcass cord material: represented by Chinese pinyin, such as M-cotton cord, R-rayon cord, N-nylon cord, G-steel cord, ZG-steel radial cord tire. Speed rating: indicates the maximum speed at which the tire can carry the specified load under specified conditions. Letters A to Z represent the certified speed ratings of the tire from 4.8km/h to 300km/h. Common speed ratings include: Q: 160km/h; H: 210km/h; V: 240km/h; W: 270km/h; Y: 300km/h; Rim specification: indicates the rim specification compatible with the tire. For practical use, such as "Standard rim 5.00F".
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DiSawyer
08/11/25 8:32pm
I remember my friend's 2015 Cadillac ATS-L Luxury trim had 255/35 R18 tires, which provided excellent stability and grip. However, there are significant configuration differences across model years - entry/mid-level trims like the Fashion edition typically use smaller 225/45 R17 wheels for better fuel efficiency. When replacing tires, you must check your vehicle's placard or manual to confirm the correct size. Wrong sizes may affect suspension and handling. Last time I helped a colleague check his used ATS-L, the previous owner installed incorrect replacement tires after the originals wore out, causing speedometer inaccuracies. He had to switch back to OEM specifications to fix it. Regularly checking tire pressure also extends tire life - safety always comes first!
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