2017 Ram 1500 — Sport R/T Regular Cab
The 2017 Ram 1500 Sport R/T Regular Cab came from the factory equipped with 285/45R22 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.
285/45R22
| Section width | 285 mm |
|---|---|
| Aspect ratio (sidewall height) | 45% (128.3 mm) |
| Rim diameter | 22" |
| Overall tire diameter | ~32.1" |
| Revolutions per mile | ~628 |
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What this size means for your Ram 1500
On the 2017 Ram 1500 Sport R/T Regular Cab, the factory 285/45R22 measures about 32.1″ in overall diameter with a 128.3 mm (5.1″) sidewall, and completes roughly 628 revolutions per mile. Its 45-series aspect ratio gives a low-profile sidewall tuned for sharper handling, common on sport trims and larger-wheel packages. In tire terms it is a large-diameter fitment.
Other 2017 Ram 1500 trims
Ram 1500 tire sizes by year
- 2026 Ram 1500 275/65R18 / 275/55R20
- 2025 Ram 1500 275/65R18 / 275/55R20
- 2024 Ram 1500 275/65R18 / 275/55R20
- 2023 Ram 1500 275/65R18 / 275/55R20
- 2022 Ram 1500 275/65R18 / 275/55R20
- 2021 Ram 1500 275/65R18 / 275/55R20
- 2020 Ram 1500 275/65R18 / 275/55R20
- 2019 Ram 1500 275/65R18 / 275/55R20
- 2018 Ram 1500 275/60R20
- 2016 Ram 1500 275/60R20
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.