2015 Infiniti Q60 — Coupe AWD Base Model
The 2015 Infiniti Q60 Coupe AWD Base Model came from the factory equipped with 225/50R18 tires. If your vehicle has since been fitted with aftermarket or upsized wheels, your actual tire size may no longer match this factory spec — always confirm against your door placard before buying.
225/50R18
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (112.5 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~26.9" |
| Revolutions per mile | ~751 |
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What this size means for your Infiniti Q60
On the 2015 Infiniti Q60 Coupe AWD Base Model, the factory 225/50R18 measures about 26.9″ in overall diameter with a 112.5 mm (4.4″) sidewall, and completes roughly 751 revolutions per mile. Its 50-series aspect ratio gives a balanced everyday-passenger profile — enough sidewall to soak up road shock while keeping steering response crisp. In tire terms it is a passenger (P-metric / Euro-metric) size.
Other 2015 Infiniti Q60 trims
- Convertible Base 225/50R18 (Front) / 245/45R18 (Rear) / 225/45R19 (Front) / 245/40R19 (Rear)
- Convertible Sport Package 225/45R19 (Front) / 245/40R19 (Rear)
- Coupe AWD Sport Package 225/45R19
- Coupe Journey Base Model 225/50R18 / 225/45R19 (Front) / 245/40R19 (Rear)
- Coupe Journey Sport Package 225/50R18 / 225/45R19 (Front) / 245/40R19 (Rear)
- IPL Convertible 225/45R19 (Front) / 245/40R19 (Rear)
- IPL Coupe 225/45R19 (Front) / 245/40R19 (Rear)
- S Convertible 6MT 225/45R19 (Front) / 245/40R19 (Rear)
- S Coupe 6MT 225/45R19 (Front) / 245/40R19 (Rear)
- S Coupe Limited 225/45R19 (Front) / 245/40R19 (Rear)
- S Coupe Limited 6MT 225/45R19 (Front) / 245/40R19 (Rear)
Infiniti Q60 tire sizes by year
- 2022 Infiniti Q60 255/40R19
- 2021 Infiniti Q60 255/40R19
- 2020 Infiniti Q60 255/40R19
- 2019 Infiniti Q60 255/40R19
- 2018 Infiniti Q60 255/40R19
- 2017 Infiniti Q60 245/40R19 / 255/40R19
- 2014 Infiniti Q60 225/50R18 (Front) / 245/45R18 (Rear)
How to read a tire size
A tire size like 225/45R17 breaks down into three parts:
the first number is the section width in millimeters
(the tire's width from sidewall to sidewall), the second is the
aspect ratio — the sidewall's height as a percentage of
that width — and the number after the "R" is the rim
diameter in inches. A letter prefix (P or LT) indicates
Passenger or Light Truck construction; its absence usually means
Euro-metric sizing.
Some trucks and off-road tires instead use "flotation" sizing, like
37X12.50R17 — here the numbers are the tire's overall
diameter and width in inches directly, with the rim diameter last.
Always verify against the tire information placard on your driver's-side door jamb or your owner's manual before purchasing — tire size can vary by factory option package even within the same trim.