2018 Acura TLX tire sizes & fitment
Approved tire and wheel sizes for the 2018 Acura TLX, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 225/50R18 OEM | R18 | N/A | N/A | N/A | N/A |
| 245/40R19 OEM | R19 | N/A | N/A | N/A | N/A |
Best by use case
Four tires, four jobs
Best all-season
Bridgestone
Turanza QuietTrack
all-season touring, UTQG 800, 80,000-mi warranty
Best budget
Bridgestone
Turanza QuietTrack
Lowest cost per mile in this size; UTQG 800
Best quiet
Bridgestone
Turanza QuietTrack
68 dB cabin noise (EU label); quietest in this size
Best winter
Bridgestone
Blizzak WS90
Dedicated winter (premium compound); ice/snow grip
See the best tires for the Acura TLX, ranked by category →
Tire recalls & safety complaints for the Acura TLX →
Compatible alternative sizes for 225/50R18
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 |
|---|---|---|---|
205/55R18 |
0.07% | winter narrower | Safe |
195/45R20 |
0.19% | plus 2 | Safe |
215/40R20 |
-0.32% | plus 2 | Safe |
245/35R20 |
-0.40% | plus 2 | Safe |
195/70R16 |
-0.41% | alternative | Safe |
For the full list of alternatives with comfort/handling impact, see 225/50R18 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 225/50R18 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 225/45R19; one rim size up, 0.43% OD change. Sharper steering, mild ride penalty, modest cost premium.
- Plus-2: 195/45R20; two rim sizes up, 0.19% OD change. Noticeable ride penalty, higher pothole risk, meaningful tire-cost premium.
Use the plus-size calculator to evaluate any rim step against the OEM size.
How to choose tires for the 2018 acura TLX V6-SH-AWD
The 2018 Acura TLX V6-SH-AWD ships from the factory on 225/50R18 tires mounted on R18 wheels. 2 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 TLX 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 2018 Acura TLX V6-SH-AWD 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 2018 Acura TLX V6-SH-AWD, 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 2018 acura TLX
Top issue category: Tires (General)
Reported across: 2018 – 2018 (1 year)
What owners described
Sidewall failure appears in 63% of these reports; about 4.2× as often as across all tire complaints. Percentages are shares of the 8 reports covering every model year of the Acura TLX 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 | 63% | 15% | 4.2× |
| Cracking or dry rot | 50% | 9% | 5.4× |
| Pressure-monitoring (TPMS) fault | 38% | 2% | 15.6× |
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Acura TLX. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
Tire size: 225/50R18 95H While parked I noticed the tire tread pealing off face of tire (the part that touches the road surface) and exposing the under layers of tire rubber and internal tread shapes Almost like outside and inside tread layers separated Not sure if from road hazard or the two layers separated on their own?
I currently have Kumho Ecsta PS91 tires on my 2021 Acura TLX that was purchased brand new and 3 out of 4 tires have cracks/splits all the way around the inside and outside sidewall. My vehicle currently has 30k miles and still has plenty of tread left on them as they are rated for 45k miles. Car has always had its routine maintenance done at Acura and tires are always checked and rotation is done also. Please look into this immediately 🙏 I was traveling on an Interstate at 70 mph and this could have been a tragedy for myself and others traveling. Also have pictures to show if needed
The contact owns a 2016 Acura TLX equipped with Goodyear Tires, Tire Line: Eagle LS2, Tire Size: 225/55/R17, DOT Number: (N/A). The contact stated while driving 50 MPH, the low tire pressure warning light illuminated. The contact was able to continue driving to her destination. The contact took the vehicle to the local dealer, and the contact was informed that the tire was punctured. Additionally, all four tires were dry-rotted and needed to be replaced. The vehicle was not repaired. The tire manufacturer had been informed of the failure. The failure mileage was approximately 145,690.
255/R40 Passenger Front and Rear tires sustained cuts/slashes on the inside walls. Front was more severe and went flat immediately. The other went flat the following day. Subsequently, saw that my TLX may have had tire issues from the manufacturer. I didn't know this at the time and when I called the dealer, they offered no assistance. Repairs cost almost $900 for two new tires at Firestone.
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 2018 Acura TLX?
Can I run a different tire size on my 2018 Acura TLX?
Where can I buy tires for my 2018 Acura TLX?
What is the recommended tire pressure for the 2018 Acura TLX?
Can I fit winter tires in a different size on my 2018 Acura TLX?
How often should I rotate the tires on my 2018 Acura TLX?
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 TLX is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 2018 Acura TLX.
- 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 2026-09-02.