2021 Genesis G80 tire sizes & fitment
Approved tire and wheel sizes for the 2021 Genesis G80, sourced from manufacturer fitment data and refreshed monthly.
Approved fitments
| Tire size | Rim size | PCD (bolt pattern) | Offset | Load index | Speed rating |
|---|---|---|---|---|---|
| 245/40R20 OEM | R20 | N/A | N/A | N/A | N/A |
| 275/35R20 OEM | R20 | N/A | N/A | N/A | N/A |
| 245/50R18 OEM | 8x18 | N/A | 39mm | 104 | W |
| 245/45R19 | 8.5x19 | N/A | 44mm | 98 | W |
| 245/40R20 | 8.5x20 | N/A | 44mm | 99 | W |
| 245/50R18 OEM | R18 | N/A | N/A | N/A | N/A |
| 245/45R19 OEM | R19 | N/A | N/A | N/A | N/A |
| 275/40R19 OEM | R19 | N/A | N/A | N/A | N/A |
Best by use case
Four tires, four jobs
Best all-season
Michelin
CrossClimate 2
all-season touring, UTQG 640, 60,000-mi warranty
Best budget
Falken
Ziex ZE960 A/S
Lowest cost per mile in this size; UTQG 640
Best quiet
Michelin
CrossClimate 2
70 dB cabin noise (EU label); quietest in this size
Best winter
Michelin
X-Ice snow
Dedicated winter (premium compound); ice/snow grip
See the best tires for the Genesis G80, ranked by category →
Tire recalls & safety complaints for the Genesis G80 →
Plus-size and winter-downsize options for every Genesis G80 factory size →
Compatible alternative sizes for 245/40R20
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 |
|---|---|---|---|
225/55R18 |
0.10% | alternative | Safe |
275/45R18 |
0.10% | alternative | Safe |
245/35R21 |
0.13% | plus 1 | Safe |
245/45R19 |
-0.13% | alternative | Safe |
215/40R21 |
0.20% | plus 1 | Safe |
For the full list of alternatives with comfort/handling impact, see 245/40R20 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 245/40R20 and verdict using the ETRTO ±3% rule.
Common upgrade paths
- Plus-1: 245/35R21; one rim size up, 0.13% OD change. Sharper steering, mild ride penalty, modest cost premium.
- Plus-2: 245/30R22; two rim sizes up, 0.26% 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 2021 genesis G80
The 2021 Genesis G80 ships from the factory on 245/40R20 tires mounted on R20 wheels. 5 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 Genesis G80 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 2021 Genesis G80 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 2021 Genesis G80, 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 2021 genesis G80
Top issue category: Tires (General)
Most reported: Tires (General) (3) · Sidewall (2)
Reported across: 2021 – 2021 (1 year)
What owners described
Sidewall failure appears in 64% of these reports; about 4.3× as often as across all tire complaints. Percentages are shares of the 11 reports covering every model year of the Genesis G80 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 | 64% | 15% | 4.3× |
| Blowout or sudden deflation | 45% | 20% | 2.3× |
| Bubble or bulge in the tire | 36% | 6% | 6.2× |
| Pressure-monitoring (TPMS) fault | 9% | 2% | 3.8× |
In owners' own words
Verbatim excerpts from complaints filed with NHTSA about Genesis G80. Reports are published by NHTSA as filed and are lightly cleaned here only to remove intake codes.
THE CONTACT OWNS A 2018 GENESIS G80 EQUIPPED WITH CONTINENTAL PROCONTACT TX TIRES, SIZE: 245/40R19 (NA). THE CONTACT STATED THAT BOTH FRONT TIRES SHOWED BUBBLES ON THE SURFACE. THE CONTACT STATED THAT THE TIRES WERE ORIGINAL FROM THE MANUFACTURER. THE VEHICLE WAS TAKEN TO TETON HYUNDAI (LOCATED AT 1350 YELLOWSTONE AVE, POCATELLO, ID 83201, (208) 417-0844) WHERE IT WAS DIAGNOSED THAT BOTH FRONT TIRES NEEDED TO BE REPLACED. THE VEHICLE WAS NOT REPAIRED. THE MANUFACTURER WAS NOTIFIED. THE VEHICLE AND TIRE FAILURE MILEAGE WAS 14,000. THE DOT NUMBER WAS UNKNOWN.
THE CONTACT OWNS A 2018 GENSESIS G80 EQUIPPED WITH CONTINENTAL TIRES, TIRE LINE: CONTI PRO CONTACT TX, TIRE SIZE 245/40/ZR19 N/A, DOT NUMBER: (NOT AVAILABLE). THE CONTACT STATED THAT WHILE DRIVING AT 40 MPH, THE VEHICLE RAN OVER A POTHOLE AND THE TIRES EXPERIENCED BLOWOUTS. THE TIRE WERE NOT THE VEHICLE ORIGINAL TIRES. THE TIRES WERE REPLACED. THE MANUFACTURER WAS CONTACTED AND INFORMED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE ON THE TIRES WAS 6,000.
THE CONTACT OWNS A 2018 GENESIS G80 EQUIPPED WITH CONTINENTAL TIRES, TIRE LINE: CONTI PRO CONTACT TX, TIRE SIZE 245/40/ZR19, DOT NUMBER: (NOT AVAILABLE). THE CONTACT STATED THAT WHILE DRIVING AT 60 MPH, A YELLOW WARNING LIGHT APPEARED ON THE INSTRUMENT PANEL. THE CONTACT PULLED OVER AND DISCOVERED THE PASSENGER'S SIDE TIRE SIDEWALL WAS BLOWN OUT. THE CONTACT ALSO STATED THAT THE CHECK YOUR TPMS WARNING MESSAGE ALSO ILLUMINATED ON THE INSTRUMENT PANEL SOON AFTER THE FAILURE. THE CONTACT CALLED ROAD SIDE ASSISTANCE AND HAD THE TIRE REPLACED. THE TIRE WAS PART OF A REPLACEMENT SET OF TIRES WHICH WERE REPLACED BY THE GENESIS DEALER. THE MANUFACTURER WAS CONTACTED AND INFORMED OF THE FAILURE. THE APPROXIMATE FAILURE MILEAGE ON THE TIRE WAS 20,000.
The vehicle has 11,000 miles on it. I just drove from Boston, MA to Scranton, PA on Thursday 6/24/21. There were no issues and I did not hit any pot holes. On Friday morning we started driving and 3-4 miles away going about 40 mph, we noticed a problem on the right front. I pulled over and we noticed the tire was flat. I called triple A and took the car to a tire repair shop. The sidewall was worn all around the perimeter of the tire and it had a hole in the sidewall. I also noticed a bubble on the left front tire, thus both tires were replaced. I notified Continental and opened a claim with them.
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 2021 Genesis G80?
Can I run a different tire size on my 2021 Genesis G80?
Where can I buy tires for my 2021 Genesis G80?
What is the recommended tire pressure for the 2021 Genesis G80?
Can I fit winter tires in a different size on my 2021 Genesis G80?
How often should I rotate the tires on my 2021 Genesis G80?
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 Genesis G80 is the authoritative source for OEM tire size, load index, and cold-inflation pressure for your specific trim.
- NHTSA SaferCar; recall lookup for the 2021 Genesis G80.
- 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.