Tire Size 295/70r18 vs 33×12.50r18
The main difference between 295/70r18 and 33×12.50r18 tires is in the section width. The 33×12.50r18 tire size is about 0.91 inch wider than the 295/70r18 tire size. This wider width impacts performance factors like ride quality, handling, traction, and more as discussed below.
| / | R |
| / | R |
| Parameter | 235/35 R18 | 205/40 R18 | Differ. |
|---|---|---|---|
| Tire Height | |||
| Section Width | |||
| Circumference | |||
| Sidewall Height | |||
| Revolutions | |||
| Rim Size |
Fitment Guide
When replacing tires, the new size should be within 3% of the overall diameter of the original tires to prevent clearance issues. The overall diameter of the 33×12.50r18 tires is 3.6% larger than the 295/70r18 tires.
This minor size difference may not require modifications for fitment on most vehicles. Still, a small lift kit could help accommodate the slightly taller 33×12.50r18 tires on some models.
Gas Mileage
The lighter 295/70R18 tires with smaller contact patches provide slightly better fuel efficiency over the wider, heavier 33×12.50R18 alternative.
For daily driven vehicles, the fuel savings could be noticeable over time. But the difference is modest between these two sizes.
Ground Clearance
With a diameter over an inch larger, the 295/70R18 tires offer more ground clearance – about 0.62 inches more than the 33×12.50R18 option.
This added clearance reduces the risk of scraping or hitting obstacles. However, the tradeoff is a lower speedometer reading compared to the 33×12.50R18.
Ride Comfort
The 33×12.50R18 tire’s more comprehensive profile and additional sidewall cushioning result in better absorption of cracks and bumps in the road.
So, while both provide a comfortable ride, the extra sidewall flex of the 33-width tire dampens more road impacts. This could be beneficial on very uneven or compromised road surfaces.
Aesthetics
Visually, there is little difference between these two tire sizes. If anything, the somewhat “stretched” look of the 295 width suits certain sports trucks and SUVs better from an aesthetic perspective. However, subjective preferences vary on the visual impact.
Handling & Stability
The 295/70R18 tire’s smaller contact patch and shorter sidewall height give it a handling advantage over the 33×12.50R18.
Responsiveness is better with less sidewall flex. However, the wider 33-inch tire provides stability with enhanced traction. Differences are minor, though – both deliver responsive, stable handling.
Noise & Vibration
Due to more sidewall cushioning, the 33×12.50R18 tire transmits less road noise and vibrations into the cabin compared to the 295/70R18.
But differences are modest – these provide similar ride quality and low noise levels overall.
Durability & Wear
With a shorter sidewall and smaller contact patch seeing less stress, tread life could be marginally better with the 295/70R18 tire.
But larger 33 inch tires can still deliver even wear and impressive longevity – differences are minor between these sizes.
Adverse Conditions
Both tires perform similarly across mud, snow, rain and light off-road duty. The 33×12.50R18 has a traction advantage from its wider tread and footprint.
But the 295/70R18’s narrower profile handles better at speed on compromised surfaces. Overall capability is comparable.
Speedometer Difference
Due to its larger diameter, the speedometer reads about 3.7% higher with the 295/70R18 tires compared to the 33×12.50R18 size.
For example, at an actual vehicle speed of 20 mph, the speedometer would read 19.28 mph with the 33×12.50R18 tire equipped. This tiny 0.72 mph difference is typical when changing the overall tire diameter.
Can I Use 295/70r18 Instead Of 33×12.50r18?
No, you should not use 295/70R18 tires instead of 33×12.50R18 tires on your vehicle. Based on the data, the overall diameter difference between these two tire sizes is 3.6%.
This exceeds the typical 3% threshold most experts recommend staying within when substituting tire sizes. This large difference could negatively impact speedometer and odometer accuracy as well as torque and gear ratios.
How Much Wider Is A 33×12.50r18 Tire Than A 295/70r18?
The 33×12.50R18 tire is nearly an inch wider than a 295/70R18, coming in at 0.91 inches (23mm) wider.
This translates to a 7.8% increase in section width between the two tire sizes. So upgrading to a 33-inch tire from a 295 provides notably more footprint.
What Does 33×12.50R18 Mean?
The 33×12.50R18 size designation provides information about the tire’s dimensions and construction.
According to 3, the tire has a diameter of 33.0 inches, a section width of 12.5 inches, and a wheel diameter of 18 inches. The “R” in the designation indicates the tire has radial construction.
295/70r18 vs 33×12.50r18
Our Observation
Based on our observation of 295/70r18 vs 33×12.50r18, the taller 33×12.50r18 tire exhibits more favorable attributes, with the key strength being additional ground clearance and a more robust look.
However, the differences between these two tires are modest. The 295/70r18 option offers a slight upper hand on handling, ride quality, noise/vibration, and even wear.
But for many truck and SUV drivers, the more excellent off-road capability and beefier aesthetic of the wider 33×12.50r18 tire provide enough justification to warrant the minimal trade-offs.
Just keep in mind a small speedometer discrepancy will occur. Ultimately, then, our recommendation would be to go with the more versatile 33×12.50r18 tire.
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.
