2004 Chevrolet TrailBlazer — EXT North Face
The 2004 Chevrolet TrailBlazer EXT North Face came from the factory equipped with 245/65R17 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.
245/65R17
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 65% (159.3 mm) |
| Rim diameter | 17" |
| Overall tire diameter | ~29.5" |
| Revolutions per mile | ~683 |
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What this size means for your Chevrolet TrailBlazer
On the 2004 Chevrolet TrailBlazer EXT North Face, the factory 245/65R17 measures about 29.5″ in overall diameter with a 159.3 mm (6.3″) sidewall, and completes roughly 683 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.
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 2004 Chevrolet TrailBlazer trims
- EXT LS 245/65R17
- EXT LT 245/65R17
- LS 245/70R16
- LT 245/70R16
- 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
- 2003 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.