285 vs 33 Tires (5 Differences and Similarities)

Offroading has become so popular that every manufacturer is bringing offroad capable vehicles. Every vehicle greatly depends on tires while offroading is no different.

Users have large confusion regarding 285 and 33 tires. I was also wondering, are 285 and 33 the same tires?

285 mm equals 11.22 inches and 33 inches equals 838.2 mm, so what is the similarity? Actually, manufacturers use two measurement systems for tires: metric and imperial.

285 indicates the tire width in millimeters which is a metric system and 33 indicates the tire diameter in inches which represents the imperial system.

Basic differences between 285 vs 33 tires are in overall diameter and tread width. 285 tire has a diameter of 32.71 inches whereas the 33 tire has a 33.03 inch diameter. Also, 285 tires are 11.22 inches wide whereas 33-inch tires have a width of 12.52 inches.

I have discussed the meaning and difference between 285 and 33 tires now. So, go through the article to eliminate confusion about 285 vs 33 tires.

What Is A 285 Tire?

what is a 285 tire

It is a truck tire having 285 mm of tread width. Tire manufacturers use metric system measurements for these tires. 285/70R17 is a popular tire for light trucks.

Diameter of the tire is 830.8 mm and the tread width is 285 mm. The suitable rim size for the tire is 431.8 mm.

Circumference of 285 tires is 2610.04 mm and the sidewall height is 199.5 mm. It can revolve 616.6 times per mile. 285 tires are good for control and offroading.

What Is A 33 Tire?

what is a 33 tire

It is a tire of 33 inches in diameter. These tires use the Imperial measurement system. 33/12.5R17 is a popular 33-inch tire. Light and heavy trucks use these tires.

It has a diameter of 33.03 inches and 12.52 inches of tread width. Circumference of the tire is 103.75 inches.

It has a sidewall height of 8.01 inches and can easily fit 17-inch rims. Revolution rate of the tire is 610.69 times per mile. It is a great choice for offroading.

Are 285 Tires the Same As 33?

285 tires are identical to 33 tires. However there is a slight difference in the measurement system, diameter, and width of the tires. 285 tires use the metric system whereas 33 tires use the imperial system for measurement.

285 mm tires are a bit smaller compared to the 33-inch tires. 285 tires have 32.71 inches and 33 tires have 33.03 inches of diameter.

Tread width for 285 tires is 11.22 inches and for 33 tires is 12.52 inches. 33 tires have a larger sidewall height which gives better off-road ability than 285 tires.

Also, there are differences in fitment, load capacity, stability, driving comfort, fuel economy, price etc.

Basic comparison table of 285 vs 33 tires is as follows:

Parameters

285/70R17

33/12.5R17

Build Type

Radial

Radial

Rim size

17 inches

(431.8 mm)

17 inches

(431.8 mm)

Overall Diameter

32.71 inches

(830.83 mm)

33.03 inches

(838.96 mm)

Radius

16.36 inches

(415.54 mm)

16.52 inches

(419.6 mm)

Tread width

11.22 inches

(284.99 mm)

12.52 inches

(318 mm)

Sidewall

7.85 inches

(199.39 mm)

8.01 inches

(203.45 mm)

Circumference

102.76 inches

(2610.1 mm)

103.75 inches

(2635.25 mm)

Revolution per mile

616 610
Load index rating 117

120

Load Capacity

2910 pounds

3086 pounds

Price

$158-$300

$184-$429

285 and 33 [5 Differences and Similarities]

285 vs 33

285 and 33 tires have basic differences in diameter, width, etc, and similarities in looks, rim compatibility, etc. I have talked about the differences and similarities elaborately for you.

1. Fitment

285/70r17 and 33/12.5r17 tires have a 1% difference in diameter, 2% difference in sidewall height and 1% circumference difference.

As tires with a difference of less than 3% are safe for replacement, 285 tires can replace 33 inch tires.

Ground clearance will be a little low for 285 tires compared to 33 tires. But never use the two tires at the same time. It may cause instability and issues.

2. Fuel economy

285/70r17 tires revolve 616 times whereas 33/12.5r17 tires revolve 610 times per mile. But 33 tires are heavier than 285 tires.

Also, 285 tires have less contact and friction with terrains than 33 tires. As a result, 33 tires provide less fuel economy than 285 tires.

3. Load capacity

Load capacity of 285/70r17 tires is 2910 pounds and 33/12.5r17 tires can load 3086 pounds. 33 tires provide smooth and stable off-roading performance compared to 285 tires.

On the other hand, 285 tires provide better performance on snowy and narrow roads.

4. Price

Prices of 33/12.5r17 tires are higher than 285/70r17 tires. 285 tires cost 158-300 dollars each and each 33 tires cost 184-429 dollars.

So, 285 tires are more budget-friendly whereas 33 tires are costly.

5. Durability

285 mm tires have a lower width than 33 inch tires. So the contact and frictions are lower in 285/70r17 tires.

As a result, 285 tires will last longer than 33 inch tires. So, 33/12.5r17 tires are less durable compared to 285 mm tires.

FAQs

Are 33 inch tires good for off roading?

33 inch tires are a great choice for offroading. They provide more control over the vehicle.

33 inch tires have 12.5 inches of tread width with 8.01 inches of sidewall height. It can dig deeper into the mud and provide better traction and off-roading experience.

Is a 33 bigger than a 285?

Yes, a 33 inch tire is slightly bigger than a 285 mm tire. They have a height difference of approximately 0.3 inches.

Also, the tread width of the 33-inch tire is 1.3 inches more than the 285 mm tire. They are very much identical with a 1-2% difference in height and width.

285 or 33, Which Tire is Better for You?

Many users suffer from the confusion of 285 and 33 tires.

They have a slight difference in diameter and width. Also, they have different measurement systems.

285 mm tires provide good driving experience and durability with better mileage and affordability.

33 inch tires are costly but they provide better traction, control, stability and offroading performance.

As a user, you should try both of the tires before choosing a specific tire set.

There is not much difference between 285 and 33 tires and they are easy to swap. However, be aware that you should never use both tires in the same vehicle, as it can lead to stability and safety issues.

Leave a Comment