The best tires for Infiniti Q50 owners are the ones that match the factory size for your trim: 225/55R17 on 17-inch wheels, 225/50R18 on 18-inch wheels, or 245/40R19 (with 265/35R19 at the rear on rear-wheel-drive Red Sport 400 cars) on 19-inch wheels. Check your door-jamb placard first, then pick a tire in that exact size.
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The three listings below are not a ranking of the best Q50 tires. One is an all-season set in a 17-inch size that is not a Q50 factory size, and two are temporary spare kits. Read the notes under each before you buy.
| Modern Spare Compact Spare Tire for 2013-2024 Infiniti Q50 |  | Compact spare (T135/80R18) | Fitment: 2013-2024 Q50 (per seller) | Type: Temporary compact spare | Size: T135/80R18 | VIEW LATEST PRICE | Read Our Analysis |
| Landgolden LG27 All-Season Tires (Set of 4, 225/50R17) |  | Also consider: not a factory size | Size: 225/50R17 | Load/speed: XL 98W (per listing) | Fit note: Not a Q50 factory size | VIEW LATEST PRICE | Read Our Analysis |
| Infiniti Q50 Spare Tire Kit (T155/70R18) |  | Second spare option | Fitment: 2013-2024 Q50 (per listing) | Type: Space-saver spare | Size: T155/70R18 | VIEW LATEST PRICE | Read Our Analysis |
More Details on Our Top Picks
Modern Spare Compact Spare Tire for 2013-2024 Infiniti Q50
Modern Spare describes this as a compact spare for 2013-2024 Q50 models, including Sport and Red Sport. Its page lists a T135/80R18 tire (104M) on an 18×4 aluminum wheel with a 5×114.3 mm bolt pattern and a 26.5-inch rolling diameter, with enlarged caliper clearance for larger brakes. Trunk fit is not addressed on the seller page; the kit is listed at 27 x 27 x 6 inches and 46 lb, and the seller offers a carrying case. Use it only as a temporary spare.- Fitment:2013-2024 Infiniti Q50 (per seller)
- Tire type:Compact temporary spare
- Tire size:T135/80R18
- Wheel:18×4 aluminum
- Bolt pattern:5×114.3 mm
- Rolling diameter:26.5 in (per seller)
Pros
- Seller lists fitment for all 2013-2024 Q50 trims, including Red Sport
- Larger caliper clearance listed for big brake systems
- Wheel and tire sold as one assembly
Limitations
- Temporary use only: observe the speed and distance limits printed on the spare
- Kit is about 46 lb and 27 inches across, so check where it will ride in the trunk
Landgolden LG27 All-Season Tires (Set of 4, 225/50R17)
The listing is for four 225/50R17 all-season tires rated XL 98W, with a symmetrical tread, wide circumferential grooves and a 60,000-mile treadlife claim from the maker. The Q50 factory 17-inch size is 225/55R17, so this 225/50R17 is a different size. It is about 3 percent smaller in overall diameter than 225/55R17, which can shift speedometer readings and gearing. Treat it as an also-consider option and ask a tire shop whether it suits your car before ordering. We found little independent test data on this tire.- Size:225/50R17
- Wheel diameter:17 in
- Load/speed:XL 98W (per listing)
- Tread life claim:60,000 miles (manufacturer claim)
- Q50 factory 17-in size:225/55R17
Pros
- Sold as a set of four
- Listed load index and speed rating are in a normal range for a sedan
- Wide grooves and symmetrical tread described for wet roads
Limitations
- 225/50R17 is not a Q50 factory size and is about 3 percent smaller in diameter than 225/55R17
- Fits only 17-inch wheels
- Little independent testing available
Infiniti Q50 Spare Tire Kit (T155/70R18)
This listing is a second spare kit for the 2013-2024 Q50 with an 18×4 steel wheel, a T155/70R18 space-saver tire and a 5×114.3 mm bolt pattern. The listing text says it suits non-Sport and non-Red Sport models, so owners of Sport or Red Sport cars with larger brakes should confirm caliper clearance with the seller first. It is listed with a different tire size than the Modern Spare above, so do not assume the two are interchangeable. It is a temporary spare, not a replacement tire.- Fitment:2013-2024 Infiniti Q50 (per listing)
- Tire type:Space-saver spare
- Tire size:T155/70R18
- Wheel:18×4 steel
- Bolt pattern:5×114.3 mm
Pros
- Steel wheel and matching bolt pattern listed
- Sold as a complete kit
Limitations
- Listing text points to non-Sport, non-Red Sport cars; confirm brake clearance
- Temporary use only
- Different spare size than the Modern Spare, so verify which one your trunk and car expect
Infiniti Q50 tire size and fit checklist
Q50 factory tire sizes by wheel size
| Wheel size | Typical factory size | Notes |
|---|---|---|
| 17 inch | 225/55R17 | Base and Pure-type trims |
| 18 inch | 225/50R18 | Luxe-type trims, 2018 and later |
| 19 inch | 245/40R19; 265/35R19 rear on RWD Red Sport 400 | Sport, Red Sport and Sensory-type trims |
Sizes vary by year, drivetrain and trim, so treat this as a guide and confirm against your door placard or owner’s manual.
Fit checklist
- Match the full size. Width, aspect ratio and wheel diameter must all match your placard.
- Keep load index and speed rating at or above the factory values.
- Staggered setups. RWD Red Sport 400 cars run wider rear tires, so front and rear tires are different sizes and cannot be swapped front to rear. Follow the manual for rotation.
- Run-flats. Some trims may have run-flat tires. Look for RFT, ZP or ROF markings on the sidewall and replace like for like unless a shop advises otherwise.
- Replace in sets. On AWD models keep tread depth matched across all four tires.
Spare tire notes
Depending on trim and year, a Q50 may not include a spare, so check your trunk and manual. A compact spare is for getting to a tire shop, not for daily driving. Read the speed and distance limits on the spare’s sidewall and see our guide on how to inflate a spare tire. If you are deciding between tire types, see summer vs all-season tires.
FAQ
What tire size does the Infiniti Q50 use?
It depends on trim and year. Common factory sizes are 225/55R17, 225/50R18 and 245/40R19, with 265/35R19 at the rear on rear-wheel-drive Red Sport 400 cars. Confirm yours on the door-jamb placard.
Can I put 225/50R17 tires on a Q50?
It is not a factory Q50 size. The factory 17-inch size is 225/55R17, and 225/50R17 is about 3 percent smaller in overall diameter. Ask a tire shop before changing size.
Do Red Sport Q50 tires differ front to rear?
On rear-wheel-drive Red Sport 400 cars, yes: 245/40R19 in front and 265/35R19 in the rear. AWD Red Sport 400 cars use 245/40R19 at all four corners. Follow your manual for rotation.
Does the Q50 come with a spare tire?
It depends on the trim and year, and some cars have no full spare. Check your trunk and owner’s manual. Compact spares are temporary and have speed and distance limits printed on them.
What tire pressure should I run on a Q50?
Use the cold-tire pressure on the door-jamb placard, not the number on the tire sidewall. Check pressure when the tires are cold and again as the weather changes.
Are run-flat tires used on the Q50?
Some trims may be fitted with run-flats. Look for RFT, ZP or ROF markings on the sidewall, and ask a shop before replacing them with standard tires.
Bottom line
For the Q50, size comes first: match the placard, then choose between touring and performance tires in that size. The Landgolden set here is in a non-factory 17-inch size, and the two spare kits are for emergencies only. For full-size replacement tires in your exact size, browse 17-inch all-season picks or 18-inch all-season picks.
