• Skip to primary navigation
  • Skip to main content
  • Skip to primary sidebar

TireTerrain

  • Home
  • How to Use Tire Decision Tools
  • Comparison & Reviews
    • By Tire Type
      • All Terrain Tires
        • Rugged Terrain Tires
        • On-Road All Terrain Tires
        • Off-Road All Terrain Tires
        • Highway-Terrain Tires
      • Passenger Tires
        • All-Season
        • All-Weather Tires
        • Performance Tires
    • Best Tires
      • by Vehicle
      • by Category
      • by Size
      • by Driving Condition
  • Pro Tips
  • About
  • Privacy Policy
  • Contact
Home » Comparisons & Reviews » 285/75R17 vs 285/70R17

285/75R17 vs 285/70R17

Updated: September 21, 2023 by Emrecan Gurkan Leave a Comment

Do you feel confused when you read tire sizes?

You will not after today!

I have trained lots of newbies in my previous employment experience. Let me help you!

When I have started to work on the tire manufacturer, I was completely crushed under the tons of tire sizes. I was afraid and don’t know what to do.

At that time, I have decided to use my favorite method.

Divide and conquer!

Alright, first of I would like to define our elements.  Let’s divide it to three.

  • 285
  • 75
  • R17

285: This elements defines the width of the tire. Unit : Milimeter

75: This element defines sidewall height. But, it is on ratio form. If you want to real height of sidewall, you have to multipley this ratio with tire width (285×0.75=213.75). Unit : Milimeter

R17: R means ‘Radial Construction’. So, the number come after the R is the rim size. Unit : Inch

Now, it is time to make some calculation. Continue below the see our, height calculations.

I highly recommend checking the below pages out before making any purchase:

  • DiscountTire Deals:
    https://www.discounttire.com/promotions
  • TireRack Deals:
    https://www.tirerack.com/specialoffers
  • SimpleTire Deals:
    https://simpletire.com/tire-deals

285/75R17 vs 285/70R17

We’ve prepared the above guide for you. We think that it will help you with our calculations.

At first look, the only difference between these two sizes is the middle element. It is ’70’ and ’75’. Yet, this ratio has a direct impact on tire height. Let’s calculate it together.

Height = (Width x Ratio)x2/25.4(1inch=25.4mm) + Rim Size 

In other words,

Height = (First Element x Second Element)x2/25.4 + Third Element

‘x2’ highlighted with red caused by two sides of the rim.

285/75R17

Height calculation :

Height = (285×0.75)x2/25.4 + 17 = 33,83 inches

285/70R17

Height calculation :

Height = (275×0,70)x2/25.4 + 17 = 32.15 inches

As you see, 5 points difference in a ratio equals 1.7 inches difference in tire height.

Please note that this calculation only works for the same patterns. Different tread depths can change tire height.

 

Where to Use It?

  • If you wanna increase your vehicle elevation, you can use the tire with higher ratio size
  • If the tire is too big and you don’t want to use a lift kit, you can use lower ratio size

Conclusion

These are the basics of tire size comparison. I hope the article was helpful!

Nobody Knows Better Than Data

As a former Bridgestone test engineer, I’ve tested hundreds of tires—and trust me, data never lies. Discount Tire Treadwell is a goldmine. Just enter your location and vehicle—boom, it shows you the best picks! You can even prioritize what matters most (comfort, durability, winter traction—you name it).

Want a full walkthrough? Check out my simple guide here—I explain how to use Treadwell to match your exact needs.

If you have any further questions or any other information content; please leave it in to comment section. I would love to help!

For those who prefer to see whole market analyze:

  • https://tireterrain.com/best-all-terrain-tires/
  • https://tireterrain.com/best-all-terrain-tires-for-snow/
  • https://tireterrain.com/best-1-2-ton-truck-tires/
  • https://tireterrain.com/best-3-4-ton-truck-tires/
  • https://tireterrain.com/best-rt-tires/
  • https://tireterrain.com/best-tires-for-snow-plowing/
  • https://tireterrain.com/on-road-all-terrain-tires-highway/

A couple of popular size analyses:

  • https://tireterrain.com/best-35x12-50r20-all-terrain-tires/
  • https://tireterrain.com/best-285-70r17-all-terrain-tires/
  • https://tireterrain.com/best-275-55r20-all-terrain-tires/
  • https://tireterrain.com/best-275-65r18-all-terrain-tires/

Want to learn more about all-terrain tires:

  • https://tireterrain.com/highway-tires-vs-all-terrain-vs-mud-terrain/
  • https://tireterrain.com/all-season-vs-all-terrain-tires/
  • https://tireterrain.com/tire-load-index-and-load-range/
  • https://tireterrain.com/lt-tires-vs-passenger-tires/
  • https://tireterrain.com/are-all-terrain-tires-good-for-daily-driving/
  • https://tireterrain.com/are-all-terrain-tires-good-in-snow/
  • https://tireterrain.com/are-all-terrain-tires-loud/
  • https://tireterrain.com/how-long-do-all-terrain-tires-last/
  • https://tireterrain.com/are-all-terrain-tires-good-in-rain/
  • https://tireterrain.com/off-road-tire-pressure-load-range-for-every-rig/

Filed Under: Tips & Guides Tagged With: 285/70R17, 285/75R17

Reader Interactions

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Primary Sidebar

Find Tires

About Me

Hey, it's Emre. I'm the proud dad of two cats, a former Bridgestone field engineer, and I hold degrees in Civil and Industrial engineering. I'm also a firm believer in the motto that "bigger is better." Read More…

Contact Channels

  • Email
  • Facebook
  • LinkedIn
  • Twitter

High-End Tires by Category

Best All-Terrain Tires

Best Rugged-Terrain Tires

Best Mud-Terrain Tires

Best All-Season Tires for Snow

Best Tires for Snow Plowing

Best Semi-Truck Tires

Categories

Copyright © 2025

  • Disclaimer
  • About Me
  • Contact