Tire Size 305/45r22 vs 33×12.50r22

The main difference between the 305/45r22 and 33×12.5r22 tire sizes lies in the section width. The tire size 33×12.5r22 is around 0.51 inch (13 mm) wider than the 305/45r22 tire size. This width difference impacts various performance factors between the two tire sizes.

Tire 1 Front View
Tire 2 Front View
Tire 1 Side View
Tire 1 Wheel
circumference 1
Tire 2 Side View
Tire 2 Wheel
/ R
/ R
Parameter235/35 R18205/40 R18Differ.
Tire Height
Section Width
Sidewall Height
Rim Size

Fitment Guide

The 33×12.5r22 is only 0.6% larger in overall diameter compared to the 305/45r22. This minor difference means both tires can likely be interchanged without fitment issues on vehicles designed for 22-inch wheels.

However, always confirm tire replacements are within 3% of the original size.

Ground Clearance

With a diameter of 33.02 inches, the 33×12.5r22 provides 0.21 inches (5.34 mm) more ground clearance than the 305/45r22 at 32.81 inches.

This slightly higher clearance benefits off-road driving by preventing scrapes over obstacles. But it also causes a marginal drop in speedometer reading for the 33×12.5r22.

Gas Mileage

The wider 33×12.5r22 has a larger contact patch, which produces more rolling resistance, reducing fuel efficiency slightly compared to the 305/45r22. Its heavier weight also increases rotational mass, further hindering mileage.

Ride Comfort

The taller sidewall of the 33×12.5r22 absorbs road impacts better than the shorter 305/45r22 sidewall.

This cushions the ride, especially over very uneven terrain. However, the 305/45r22’s stiffer sidewall on smooth highways provides a more responsive and agile feel.


Visually, the 33×12.5r22 has a modestly stretched, aggressive look owing to its 0.11-inch taller sidewall. This suits the aesthetics of trucks and SUVs well. The 305/45r22 appears slightly more low-profile in contrast.

Handling & Stability

The 305/45r22’s shorter, stiffer sidewall enhances handling precision and turn-in responsiveness.

The 33×12.5r22’s slightly taller sidewall flexes more, reducing handling sharpness mildly but aiding stability, especially off-road.

Noise & Vibration

The 33×12.5r22’s extra air volume and sidewall flex help absorb road noise and vibrations, contributing to a marginally smoother, quieter ride. The 305/45r22’s stiff sidewall transmits more harshness into the cabin.

305/45r22 vs 33×12.50r22

Durability & Wear

With a smaller contact patch, the 305/45r22 may potentially exhibit more even treadwear and longer life.

The wider 33×12.5r22 is heavier, which could accelerate wear on suspension and driveline components.

Adverse Conditions

The narrower 305/45r22 may cut through to the pavement better for traction in snow and ice.

But the wider 33×12.5r22 provides superior performance in mud, sand, and other off-road conditions. Both handle rain well.

Tire Size 30545r22

Speedometer Reading

At an actual speed of 20 mph, the speedometer reads 20.13 mph for the 33×12.5r22, compared to 20 mph for the 305/45r22. This minor 0.13 mph variance is due to the very small diameter difference.

Alternative For 305/70r18
The following table presents a comparison of tire sizes, showing their overall diameter and the percentage difference from the 295/70R18 tire size.

Tire SizeOverall DiameterDifference
295/70R1834.3″ (871 mm)-1.6%
345/60R1834.3″ (871 mm)-1.6%
325/65R1834.6″ (879 mm)-0.7%
285/75R1834.8″ (885 mm)0%
275/80R1835.3″ (897 mm)1.4%
315/70R1835.4″ (899 mm)1.6%
375/60R1835.7″ (907 mm)2.5%

305/45r22 vs 33x12.50r22

Alternative For 33×12 50r22
The table showcases the overall diameter of different tire sizes and their percentage difference compared to the 295/70R18 tire size

Tire SizeDiameterDifference

33×12.50r22 Equivalent

In the metric system, a 33×12.50R22 tire’s equivalent size is 315/45R22. This conversion provides a comparable tire dimension, maintaining similar diameter and width for vehicles requiring metric measurements.

Is a 305/45r22 Tire the Same as a 33×12.5r22?

The 305/45R22 tire is not the same as a 33×12.5R22 in overall diameter. The 305/45R22 generally has a diameter of about 32.8 inches, while the 33×12.5R22 is designed to be 33 inches in diameter, indicating a slight difference in size.

Our Observation
Based on the comparison, the 33×12.5r22 is better suited for vehicles focused on off-road performance and utility. Its wider tread provides traction in mud and sand, while the taller sidewall aids ground clearance and absorbs impacts off-road.

The 305/45r22 is preferable for vehicles that emphasize on responsive handling and fuel efficiency. Its shorter, stiff sidewall enhances the cornering grip and feels on the pavement.

We recommend the 33×12.5r22 for trucks, SUVs, and 4x4s driving off-road routinely. The 305/45r22 suits lowered sports cars, and coupes focused on performance and mileage.

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