2026 Acura MDX tire sizes & fitment
Approved tire and wheel sizes for the 2026 Acura MDX, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 275/40R21 OEM | R21 | 5x114.3 | N/A | N/A | N/A |
| 275/40R21 OEM | 9.5x21 | 5x114.3 | 55mm | 104 | H |
| 255/55R19 OEM | 8.5x19 | 5x114.3 | 55mm | N/A | N/A |
| 255/50R20 OEM | 9x20 | 5x114.3 | 55mm | N/A | N/A |
| 255/50R20 OEM | R20 | 5x114.3 | N/A | N/A | N/A |
| 255/55R19 OEM | R19 | 5x114.3 | N/A | N/A | N/A |
2026 Acura MDX wheel bolt pattern & specs
| Bolt pattern (PCD) | 5x114.3 |
|---|---|
| Wheel thread / lug size | M12x1.5 |
| Center bore | 64.1 mm |
| Source | adaptitusa-reference |
Best by use case
Four tires, four jobs
See the best tires for the Acura MDX, ranked by category →
Tire recalls & safety complaints for the Acura MDX →
Plus-size and winter-downsize options for every Acura MDX factory size →
Compatible alternative sizes for 275/40R21
Sizes within the ETRTO ±3% overall-diameter safe-fit tolerance. Each row links to the size's own page.
| Alternative size | %Δ OD | Category | Verdict |
|---|---|---|---|
245/50R20 |
-0.05% | winter narrower | Safe |
245/45R21 |
0.07% | winter narrower | Safe |
245/55R19 |
-0.17% | alternative | Safe |
245/40R22 |
0.19% | plus 1 | Safe |
305/40R20 |
-0.19% | alternative | Safe |
For the full list of alternatives with comfort/handling impact, see 275/40R21 upsize options. To check an arbitrary size pair, use the tire compatibility calculator.
Check a different size against this vehicle
Type any tire size below; we'll compute its overall-diameter delta against the OEM 275/40R21 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 245/40R22; one rim size up, 0.19% OD change. Sharper steering, mild ride penalty, modest cost premium.
Use the plus-size calculator to evaluate any rim step against the OEM size.
How to choose tires for the 2026 acura MDX
The 2026 Acura MDX ships from the factory on 275/40R21 tires mounted on R21 wheels. 3 approved fitments are documented for this model year, allowing some flexibility between performance, comfort, and winter compounds. The Compatible alternative sizes table above lists every safe substitution within the ETRTO ±3% overall-diameter tolerance.
Tire choice on the Acura MDX comes down to three trade-offs that matter more than brand loyalty: load index (must equal or exceed the OEM number), speed rating (must match or exceed the placard), and UTQG treadwear (higher means longer life, lower usually means stickier rubber). Owners replacing factory tires with the same compound class, for example all-season for all-season, generally see no change in ride characteristics or fuel economy. Switching categories (performance summer to all-season touring, for example) is where the trade-offs show up at the contact patch.
For 2026 Acura MDX owners considering a plus-size upgrade, the safer option is a Plus-1 step (one rim size up with a 10-point aspect drop and ~10 mm of additional section width). Plus-2 is technically viable on this chassis if the alternative-sizes table lists a Plus-2 candidate within tolerance, but expect a meaningful ride-harshness penalty and a tire-cost premium of 30–60% per tire relative to the OEM fitment. For winter use the recommended pattern is one width step down (e.g. from a 235 to a 225) with the aspect ratio bumped up to preserve overall diameter; narrower tires apply higher contact pressure per square inch on snow, which translates directly into shorter braking distances. The plus-size calculator evaluates any specific rim step against this OEM size.
Before purchasing, verify the tire size on the driver-door placard of your specific 2026 Acura MDX, since trim levels and option packages can shift the original fitment from what is documented here. The placard reading is the authoritative source per FMVSS 110, and dealers will reference the placard rather than aftermarket catalogs when validating warranty claims.
NHTSA-reported issues for 2026 acura MDX
Top issue category: Tires (General)
Most reported: Tires (General) (23) · Tread / Belt (3) · Sidewall (3) · TPMS (2) · Spare Tire (2)
Reported across: 2001 – 2025 (16 years)
What owners described
Sidewall failure is the most common description, in 14% of these reports. Percentages are shares of the 21 reports covering every model year of the Acura MDX that include a written account; a single report can describe more than one problem, so they do not total 100%.
| Reported problem | This subject | All tire complaints | Relative |
|---|---|---|---|
| Sidewall failure | 14% | 15% | 1.0× |
| Blowout or sudden deflation | 10% | 20% | 0.5× |
| Loss of control, rollover or collision | 10% | 8% | 1.1× |
| Tread or belt separation | 5% | 13% | 0.4× |
| Cracking or dry rot | 5% | 9% | 0.5× |
| Premature or uneven wear | 5% | 1% | 3.7× |
Mileage at failure
7 of these reports state an odometer reading. The middle report is at 31,000 miles, with 8 in 10 falling between 5,530 and 145,000 miles.
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Acura MDX. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
THE CONTACT OWNS A 2016 ACURA MDX. THE CONTACT STATED THAT SIDEWALLS OF THE SPARE TIRE, WHICH WAS STORED UNDERNEATH THE VEHICLE, WAS WEARING THROUGH AT THREE DIFFERENT LOCATIONS. THE TIRE WAS TAKEN TO MCDANIELS ACURA OF CHARLESTON (2283 SAVANNAH HWY, CHARLESTON, SC 29414, (843) 766-1299) AND THE CONTACT WAS INFORMED NOT TO WORRY. THE CAUSE OF THE FAILURE WAS NOT DETERMINED. THE MANUFACTURER WAS NOT CONTACTED. THE FAILURE MILEAGE WAS 20,000.
The contact owns a 2017 Acura MDX equipped with Les Schwab Tires, Tire Line: Back Country Touring, Tire Size: 245/50/R20, DOT Number: UP76 DRW. The contact stated that while making a left turn, the front passenger's side tire rolled over a plastic lane divider. The contact then heard air being released from the tire and immediately pulled over into a parking lot. The contact discovered side wall separation on the front passenger's side tire and pulled into gas station to replace the tire with the spare. Upon investigation, the contact discovered NHTSA Campaign Number: 21T002000 (Tires) which the contact linked to the failure. The manufacturer was notified of the failure and the contact was informed that the tire size was not included in the recall. The tire was not replaced. The vehicle and tire failure mileages were not provided.
WHILE TRAVELING APPROXIMATLEY 40 MPH IN A 2001, ACURA MDX RIGHT/FRONT GOODYEAR INTEGRITY TIRE, SIZE: 235/65R17, DOT: 4B87 EXPERIENCED A BLOWOUT. CONSUMER SMELLED SOMETHING BURNING BEFORE INCIDENT OCCURRED. A TIRE SHOP WAS UNABLE TO LOCATE CAUSE FOR ANY SMOKE OR BURNING SMELLS. THERE WERE APPROXIMATELY 5,530 MILES ON TIRE, AND IT WAS ORIGINAL EQUIPMENT. *AK *TT *NLM
THE CONTACT OWNS A 2002 ACURA MDX. THE DEALER INFORMED THE CONTACT THAT ALL FOUR MICHELIN CROSS-TERRAIN TIRES ROTTED AND NEEDED TO BE REPLACED. THE DEALER STATED THAT THE THREADS WERE CRACKED, AND THEY WERE UNABLE TO DETERMINE THE REASON FOR THE FAILURE. ALSO, THE DEALER ADVISED THE CONTACT THAT THE NORMAL THREAD COUNT WAS 1132,AND THE TIRES CURRENTLY HAD A THREAD COUNT OF 832. THE CURRENT AND FAILURE MILEAGE WERE 38500. *AK UPDATED 04/12/07.
Complaints are voluntarily submitted to the NHTSA Office of Defects Investigation and are not verified by NHTSA; they represent owner-reported problems, not proven defects. Counts can be useful as a relative quality signal across comparable tires or vehicles.
Frequently asked questions
What size tires fit a 2026 Acura MDX?
What is the bolt pattern of a 2026 Acura MDX?
Can I run a different tire size on my 2026 Acura MDX?
Where can I buy tires for my 2026 Acura MDX?
What is the recommended tire pressure for the 2026 Acura MDX?
Can I fit winter tires in a different size on my 2026 Acura MDX?
How often should I rotate the tires on my 2026 Acura MDX?
For broader tire questions; replacement timing, UTQG, EV-specific tires, winter swaps; see the tire FAQ.
Sources for this page
- Vehicle owner's manual tire & wheel placard; door-jamb placard on the Acura MDX is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 2026 Acura MDX.
- ETRTO 2024 Standards Manual §2.3; overall-diameter math used for the alternative-size verdicts above.
- Tire & Rim Association 2025 Yearbook; load-index to maximum-load reference.
Last verified 2026-10-07.