2003 Chevrolet Blazer — 4wd 4dr
The 2003 Chevrolet Blazer 4wd 4dr 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.
235/70R15
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 70% (164.5 mm) |
| Rim diameter | 15" |
| Overall tire diameter | ~28" |
| Revolutions per mile | ~722 |
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235/75R15
| Section width | 235 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (176.3 mm) |
| Rim diameter | 15" |
| Overall tire diameter | ~28.9" |
| Revolutions per mile | ~698 |
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What this size means for your Chevrolet Blazer
On the 2003 Chevrolet Blazer 4wd 4dr, the factory 235/70R15 measures about 28″ in overall diameter with a 164.5 mm (6.5″) sidewall, and completes roughly 722 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 235/70R15 and 235/75R15 differ by about 0.9″ (3.2%) in overall diameter; a gap this size is enough to affect speedometer and odometer readings, so confirm which one your vehicle actually left the factory with.
On a vehicle of this age, the Chevrolet Blazer 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 2003 Chevrolet Blazer trims
Chevrolet Blazer tire sizes by year
- 2026 Chevrolet Blazer 235/65R18 / 235/55R20
- 2025 Chevrolet Blazer 235/65R18 / 235/55R20
- 2024 Chevrolet Blazer 235/65R18 / 235/55R20
- 2023 Chevrolet Blazer 235/65R18 / 235/55R20
- 2022 Chevrolet Blazer 235/65R18 / 235/55R20
- 2021 Chevrolet Blazer 235/65R18
- 2020 Chevrolet Blazer 235/65R18
- 2019 Chevrolet Blazer 235/65R18 / 235/55R20
- 2005 Chevrolet Blazer 235/70R15
- 2004 Chevrolet Blazer 235/70R15
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.