2009 Ford Explorer — Sport Trac Limited
The 2009 Ford Explorer Sport Trac Limited 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.
235/65R18
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 65% (152.8 mm) |
| Rim diameter | 18" |
| Overall tire diameter | ~30" |
| Revolutions per mile | ~672 |
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255/50R20
| Section width | 255 mm |
|---|---|
| Aspect ratio (sidewall height) | 50% (127.5 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~30" |
| Revolutions per mile | ~671 |
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What this size means for your Ford Explorer
On the 2009 Ford Explorer Sport Trac Limited, the factory 235/65R18 measures about 30″ in overall diameter with a 152.8 mm (6″) sidewall, and completes roughly 672 revolutions per mile. Its 65-series aspect ratio gives a taller, comfort-biased sidewall that favors ride quality and shrugs off rough pavement. In tire terms it is a passenger (P-metric / Euro-metric) size.
The 235/65R18 and 255/50R20 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 Ford Explorer 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.
Other 2009 Ford Explorer trims
- Eddie Bauer 245/65R17 / 235/65R18 / 255/50R20
- Limited 235/65R18 / 255/50R20
- Sport Trac Adrenalin 255/50R20
- Sport Trac XLT 235/70R16 / 245/65R17
- XLT 235/70R16 / 245/65R17
- XLT Sport 255/50R20
Ford Explorer tire sizes by year
- 2026 Ford Explorer 255/65R18 / 255/55R20
- 2025 Ford Explorer 255/65R18 / 255/55R20
- 2024 Ford Explorer 255/65R18
- 2023 Ford Explorer 255/65R18
- 2022 Ford Explorer 255/65R18
- 2021 Ford Explorer 255/65R18
- 2020 Ford Explorer 255/65R18
- 2019 Ford Explorer 245/60R18
- 2018 Ford Explorer 245/60R18
- 2017 Ford Explorer 245/60R18
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.