285 vs 305 Tires

285 vs 305 Tires

The main difference between these tire sizes comes down to section width. The 305 tire size is 20 millimeters (0.79 inches) wider than the 285 tire size.

This slight difference in width impacts various performance factors. Understanding how these tire sizes compare can help drivers choose the right option for their needs.

305 vs 285 Tires

By referring to this comparison table, you can quickly grasp the differences between the two tire sizes and better understand their distinctive features.

FeatureTire Size 285Tire Size 305
Width (mm)285305
Width (inches)11.2212.01
Width Difference20 millimeters smaller than 305 tire size20 millimeters larger than 285 tire size
Ground ClearanceSlightly lowerSlightly higher
Gas MileageSlightly betterSlightly worse
Ride ComfortSmoother on pavementBetter impact absorption off-road
AestheticsBalanced lookMore aggressive stance
HandlingMore responsiveAdded stability
Noise LevelsBit quieterDampens vibrations slightly better
Adverse ConditionsBetter Traction on ice/snowBetter Traction in mud/sand

Ground Clearance

The slightly wider 305 tire provides a slight increase in ground clearance over the 285, which is beneficial for off-roading.

However, the difference is minor, and both can potentially scrape on obstacles. Lower profile 285 tires offer more straightforward speedometer calibration.

Gas Mileage

With a more minor contact patch, 285 tires confer improved fuel efficiency over 305. The marginally lighter rotational mass also contributes to better gas mileage. However, the difference is modest, and both remain reasonable options for commuting.

Ride Comfort

On smooth roads, narrower 285 tires provide a smoother ride, while wider 305 absorb impacts slightly better on uneven surfaces. Overall ride comfort differs minimally between these two sizes.


305 tires lend a somewhat brawnier, aggressive look, especially on trucks and SUVs. However, 285 maintain a well-balanced aesthetic on most vehicles. Beauty remains subjective with either size.

Handling & Stability

More responsive steering and handling gives 285 tires a slight edge on the pavement. But 305 offer somewhat more stability and traction off-road. On most roads, both handle well with no major difference.

Noise & Vibration

With less tread in contact with the road, 285 tires are marginally quieter on smooth pavement. But 305 can dampen vibrations slightly better. Neither produces excessive noise or vibration.

Durability & Wear

The nearly identical sizes offer comparable durability and treadwear. Both should provide many miles of use with proper maintenance. Rotating and aligning them regularly optimizes longevity.

285 vs 305 Tires

Adverse Conditions

In deep mud or sand, wider 305 tires gain a bit more traction over 285. But on snow and ice, 285 can cut through slightly better. Overall, the small size difference minimally impacts performance in adverse conditions.

How Much Bigger Is A 305 Than A 285?

The 305 tire is wider than the 285 tire by approximately 20 millimeters or 0.79 inches. The numbers 285 and 305 refer to the width of the tire in millimeters.

For instance, if we take a 305/70-16 tire, it means that the tire has a width of 12.01 inches. Similarly, if we take a 285/75-16 tire, it means that the tire has a width of 11.22 inches.

Can I Replace 285 Tires With 305?

Yes, you can replace 285 tires with 305, given they have the same aspect ratio (70) and 16-inch rim size. The overall diameter of the 285 tire is 32.71 inches, and for the 305 tire, it needs to be within 3%, which is 33.74 inches.

As long as the aspect ratio and rim size match, the replacement falls within the allowable 3% limit for overall diameter.

What Size Is A 305 Tire?

The 305 tire size typically refers to the tire’s width in millimeters. Specifically, a 305 tire has a width of 305 millimeters. The measurement of tire width is always the distance from one sidewall to the other.

What Size Is A 285 Tire?

The tire size of 285 means that the tire has a width of 285 millimeters. This size is part of a code that includes additional information such as the aspect ratio and rim diameter.

What Is A 305 Tire In Inches?

The “305” refers to the width of the tire in millimeters, which is approximately 12.01 inches. Therefore, to convert a 305 mm width to inches, you would divide 305 by 25.4.

What Is A 285 Tire In Inches?

The “285” on a tire indicates its width in millimeters, which is around 11.22 inches. To convert this 285 mm width to inches, divide it by 25.4.

Our Observation
While 305 tires offer some advantages for off-roading, 285 provide slightly improved on-road manners. For most drivers, the difference between these sizes remains minor.

Those seeking an aggressive look may prefer 305, but 285 blend well aesthetically with most vehicles. Either size works well for optimal longevity, fuel efficiency, and a smooth, comfortable ride. Evaluate your priorities and weigh the trade-offs, but you can go right with a 285 or 305.

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