2003 Toyota Tacoma — 4wd Regular Cab

The 2003 Toyota Tacoma 4wd Regular Cab 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.

225/75R15

Section width225 mm
Aspect ratio (sidewall height)75% (168.8 mm)
Rim diameter15"
Overall tire diameter~28.3"
Revolutions per mile~713

Compare prices at:

265/70R16

Section width265 mm
Aspect ratio (sidewall height)70% (185.5 mm)
Rim diameter16"
Overall tire diameter~30.6"
Revolutions per mile~659

Compare prices at:

What this size means for your Toyota Tacoma

On the 2003 Toyota Tacoma 4wd Regular Cab, the factory 225/75R15 measures about 28.3″ in overall diameter with a 168.8 mm (6.6″) sidewall, and completes roughly 713 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 225/75R15 and 265/70R16 differ in both width and overall diameter (2.3″, 8.1%), 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 Toyota Tacoma 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 Toyota Tacoma trims

Toyota Tacoma tire sizes by year

See every Toyota Tacoma year & trim →

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.