Acura tire sizes

We cover 5 Acura models across 7 factory fitments, spanning model years 2004 to 2024. The size that turns up most often on a Acura is 225/40R18, followed by 235/40R18 and 255/50R20. Wheel diameters run from 17 to 20 inches, so the trim and wheel package matter as much as the model year.

Acura does not stamp an approval code on tires the way Porsche and BMW do, so any tire in the right size that meets the load index and speed rating on the door placard is a legitimate replacement. Pick on wet braking, tread life and price instead.

Pick your model below to see the size for every year and trim, what it costs from budget to premium, and which tires are worth buying in that size. If you already know your size, search by size instead, and if you are not sure where to find it, our guide on reading a tire size shows exactly where the placard sits.

Acura is Honda's premium division, created for the United States in 1986 and still sold mainly here and in Canada rather than in Japan. Volume comes from two crossovers, the MDX and the RDX, with the TLX sedan and the Integra hatchback filling out the range. Annual US sales run in the region of 130,000 to 150,000 vehicles.

The reputation is Honda mechanicals with more sound deadening and a sportier chassis tune, which is what shows up in the tire sizes.

Tires on a Acura

Acura does not stamp an approval code on its tires, so there is no letter to hunt for the way there is on a BMW or a Porsche, and any tire that meets the placard size, load index and speed rating is a legitimate replacement. What you get instead is a lineup that runs wider and lower than the Honda it shares a platform with: an MDX on 20 inch wheels takes 255/50R20 today and 245/50R20 through the 2014 to 2020 generation. Fitments are square rather than staggered on the mainstream cars, so four identical tires is the normal purchase, but the TLX Type S is the exception with 255/35R20 all round on a wheel that leaves very little sidewall.

Wheel diameters have crept up hard: the 2004 to 2008 TSX ran 235/45R17, the 2015 to 2020 TLX moved to 245/45R18, and the Type S is on 20s. Most Acuras leave the factory on a grand touring all-season, and owners replacing them split between another quiet all-season and a max-performance summer tire on the A-Spec and Type S cars. The two A-Spec ILX fitments, 235/40R18 on the 2016 to 2018 cars and 225/40R18 on the 2019 to 2022 facelift, are the sizes most often ordered wrongly, because the change is easy to miss.

The models that matter

The MDX is the volume model and the one that matters most for tires, on 245/50R20 through the 2014 to 2020 generation and 255/50R20 on current 20 inch trims. The TLX runs 245/45R18 in V6 form and jumps to 255/35R20 as the Type S. Older cars still in service are mostly TSX on 235/45R17 and ILX on 18 inch wheels.

What owners find out later

A 255/35R20 on the TLX Type S has roughly three and a half inches of sidewall, which is not much protection against a pothole, and bent rims are a known complaint on that fitment. Acura uses direct TPMS with sensors in the wheels, so a winter wheel package needs its own sensors or a relearn at fitting. Many Acuras ship with a temporary spare rather than a full size one, and some trims carry only an inflator kit, so check the trunk floor before you assume you can limp home.