2003 Infiniti QX4 — Base Model
The 2003 Infiniti QX4 Base Model shipped with 2 different factory tire sizes, depending on the wheel package it left the factory with (this can also reflect a staggered front/rear setup). Check your tire sidewall or door placard to confirm which one applies to your vehicle.
This trim shipped with more than one tire size (staggered fitment, front/rear, or optional wheel package). Confirm which one matches your vehicle by checking your tire sidewall or door placard.
245/70R16
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 70% (171.5 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~29.5" |
| Revolutions per mile | ~684 |
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245/65R17
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 65% (159.3 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~29.5" |
| Revolutions per mile | ~683 |
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What this size means for your Infiniti QX4
On the 2003 Infiniti QX4 Base Model, the factory 245/70R16 measures about 29.5″ in overall diameter with a 171.5 mm (6.8″) sidewall, and completes roughly 684 revolutions per mile. Its 70-series aspect ratio gives a tall sidewall of the kind used on trucks, SUVs, and older passenger cars, built for cushioning and load. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 245/70R16 and 245/65R17 roll within 0″ (0%) of each other in overall diameter, so they are interchangeable from a speedometer standpoint — the second size is an optional wheel package rather than a different rolling size.
On a vehicle of this age, the Infiniti QX4 may have been refitted with a slightly different replacement size somewhere in its life, so check the current sidewall — not just the factory spec — before buying.
Infiniti QX4 tire sizes by year
- 2002 Infiniti QX4 245/70R16 / 245/65R17
- 2001 Infiniti QX4 245/70R16 / 245/65R17
- 2000 Infiniti QX4 255/65R16
- 1999 Infiniti QX4 245/70R16 / 255/65R16
- 1998 Infiniti QX4 245/70R16
- 1997 Infiniti QX4 245/70R16
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.