2003 Chevrolet TrailBlazer — LS
The 2003 Chevrolet TrailBlazer LS came from the factory equipped with 245/70R16 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.
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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What this size means for your Chevrolet TrailBlazer
On the 2003 Chevrolet TrailBlazer LS, 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.
On a vehicle of this age, the Chevrolet TrailBlazer 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 TrailBlazer trims
- EXT LS 245/65R17
- EXT LT 245/65R17
- EXT North Face 245/65R17
- LT 245/70R16
- LTZ 245/65R17
- North Face 245/65R17
Chevrolet TrailBlazer tire sizes by year
- 2026 Chevrolet TrailBlazer 225/60R17
- 2025 Chevrolet TrailBlazer 225/60R17
- 2022 Chevrolet TrailBlazer 225/60R17
- 2021 Chevrolet TrailBlazer 225/60R17
- 2009 Chevrolet TrailBlazer 245/65R17 / 245/60R18
- 2008 Chevrolet TrailBlazer 245/65R17 / 245/60R18
- 2007 Chevrolet TrailBlazer 235/75R16 / 245/65R17
- 2006 Chevrolet TrailBlazer 245/65R17
- 2005 Chevrolet TrailBlazer 245/65R17
- 2004 Chevrolet TrailBlazer 245/65R17
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.