1997 GMC K1500 — 4wd Pick-up
The 1997 GMC K1500 4wd Pick-up shipped with 3 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.
225/75R16
| Section width | 225 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (168.8 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~29.3" |
| Revolutions per mile | ~689 |
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245/75R16
| Section width | 245 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (183.8 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~30.5" |
| Revolutions per mile | ~662 |
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265/75R16
| Section width | 265 mm |
|---|---|
| Aspect ratio (sidewall height) | 75% (198.8 mm) |
| Rim diameter | 16" |
| Overall tire diameter | ~31.6" |
| Revolutions per mile | ~637 |
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What this size means for your GMC K1500
On the 1997 GMC K1500 4wd Pick-up, the factory 225/75R16 measures about 29.3″ in overall diameter with a 168.8 mm (6.6″) sidewall, and completes roughly 689 revolutions per mile. Its 75-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 225/75R16 and 245/75R16 differ in both width and overall diameter (1.2″, 4.1%), which usually means a staggered front/rear setup — the two sizes are not interchangeable side to side, so match each to its correct axle.
On a vehicle of this age, the GMC K1500 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.
GMC K1500 tire sizes by year
- 1999 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1998 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1996 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1995 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1994 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1993 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1992 GMC K1500 225/75R16 / 245/75R16 / 265/75R16
- 1991 GMC K1500 225/75R16
- 1990 GMC K1500 225/75R16
- 1989 GMC K1500 225/75R16
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.