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.
| / | R |
| / | R |
| Parameter | 235/35 R18 | 205/40 R18 | Differ. |
|---|---|---|---|
| Tire Height | |||
| Section Width | |||
| Circumference | |||
| Sidewall Height | |||
| Revolutions | |||
| 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.
Aesthetics
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.
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.
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 Size | Overall Diameter | Difference |
|---|---|---|
| 295/70R18 | 34.3″ (871 mm) | -1.6% |
| 345/60R18 | 34.3″ (871 mm) | -1.6% |
| 325/65R18 | 34.6″ (879 mm) | -0.7% |
| 285/75R18 | 34.8″ (885 mm) | 0% |
| 275/80R18 | 35.3″ (897 mm) | 1.4% |
| 315/70R18 | 35.4″ (899 mm) | 1.6% |
| 375/60R18 | 35.7″ (907 mm) | 2.5% |
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 Size | Diameter | Difference |
|---|---|---|
| 275/50R22 | 32.8″ | -0.61% |
| 285/45R22 | 32.1″ | -2.73% |
| 305/45R22 | 32.8″ | -0.61% |
| 325/40R22 | 32.2″ | -2.42% |
| 285/50R22 | 33.2″ | 0.61% |
| 295/50R22 | 33.6″ | 1.82% |
| 315/45R22 | 33.2″ | 0.61% |
| 343/41/R22 | 33.0″ | 0% |
| 368/38/R22 | 33.0″ | 0% |
| 355/40R22 | 33.2″ | 0.61% |
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.
Meet Caitlin McCormack, a Tire Size Expert and Blogger Passionate About Everything Related to Tires. With Years of Experience in the Tire Industry, Caitlin Has Become an Expert in Tire Sizes and Their Impact on Vehicle Performance.
