2020 Ram 1500 — Classic Tradesman
The 2020 Ram 1500 Classic Tradesman 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.
265/70R17
| Section width | 265 mm |
|---|---|
| Aspect ratio (sidewall height) | 70% (185.5 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~31.6" |
| Revolutions per mile | ~638 |
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275/60R20
| Section width | 275 mm |
|---|---|
| Aspect ratio (sidewall height) | 60% (165 mm) |
| Rim diameter | 20" |
| Overall tire diameter | ~33" |
| Revolutions per mile | ~611 |
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What this size means for your Ram 1500
On the 2020 Ram 1500 Classic Tradesman, the factory 265/70R17 measures about 31.6″ in overall diameter with a 185.5 mm (7.3″) sidewall, and completes roughly 638 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 265/70R17 and 275/60R20 differ in both width and overall diameter (1.4″, 4.4%), which usually means a staggered front/rear setup — the two sizes are not interchangeable side to side, so match each to its correct axle.
Other 2020 Ram 1500 trims
- Big Horn 275/65R18 / 275/55R20
- Classic Express 265/70R17 / 275/60R20
- Classic Warlock 275/60R20
- Laramie 275/65R18 / 275/55R20 / 285/45R22
- Laramie Longhorn 275/55R20 / 285/45R22
- Limited 275/55R20 / 285/45R22
- Lone Star 275/65R18 / 275/55R20
- Rebel 275/70R18
- Tradesman 275/65R18
- Tradesman HFE 275/55R20
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
- 2019 Ram 1500 275/65R18 / 275/55R20
- 2018 Ram 1500 275/60R20
- 2017 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.