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Old 10-25-2020, 05:20 PM #1
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Any info on ride height difference when upgrading from 265 to 285?

Can't seem to find any comparisons anywhere & i was curious how much of a difference upgrading from 265 terra grapplers to 285 ko2's would make in ride height
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Old 10-25-2020, 05:22 PM #2
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Obviously depends a little on air pressure but wouldn’t it just be (diameter 285-diameter 265) / 2 (because you’re only getting half the change from the bottom side of tire that makes a difference in height?)
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Old 10-25-2020, 05:31 PM #3
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Quote:
Originally Posted by 4runningyeti View Post
Obviously depends a little on air pressure but wouldn’t it just be (diameter 285-diameter 265) / 2 (because you’re only getting half the change from the bottom side of tire that makes a difference in height?)
Not quite. A tire is 265/70R17, 265mm width, 70% sidewall ratio, 17" wheel.
265 * .7 = 185.5 sidewall height
285 * .7 = 199.5 sidewall height
199.5 - 185.5 = 14mm difference, which equates to 0.55"
Which is about what you get (0.6") using a Tire Size Comparison Tool
Keep in mind tire sizes can vary manufacturer to manufacturer too.
But I can tell you going from a 265 to a 275 was a noticeable difference on a daily driver, and the same again for going to 285 from 275.
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Old 10-25-2020, 10:41 PM #4
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Quote:
Originally Posted by Friggin Idiot View Post
Not quite. A tire is 265/70R17, 265mm width, 70% sidewall ratio, 17" wheel.
265 * .7 = 185.5 sidewall height
285 * .7 = 199.5 sidewall height
199.5 - 185.5 = 14.5mm difference, which equates to just under 0.6"
Which is exactly what you get using a Tire Size Comparison Tool
Keep in mind tire sizes can vary manufacturer to manufacturer too. But I can tell you going from a 265 to a 275 was a noticeable difference on a daily driver, and the same again for going to 285 from 275.

Then maybe I can run 285s with a minor lift and minor trimming on my 4runner!? 🤔
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Old 10-25-2020, 11:04 PM #5
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Quote:
Originally Posted by SR52011 View Post
Then maybe I can run 285s with a minor lift and minor trimming on my 4runner!? ��
It all depends on the exact tire. There are pretty substantial differences between brands and between P vs LT both with respect to how tall a tire is and how wide it is.

A 265 70 can be anywhere between less than 8 wide and 9 wide, like a 285 (!).

A 275 70 can be anywhere from 31.7 to 32.4 tall and so on and so forth.

When you are splitting hairs, this kind of difference does matter.

So with 285, some are barely over 32.5" tall and others are over 33". I bet width varies a great deal as well.
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Old 10-26-2020, 03:11 AM #6
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Parked next to another 5th Gen at work that was stock except for the new rims. Mine has a 2.5" lift and Cooper Evolution MT 285s which are listed at 32.9" tall.
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Any info on ride height difference when upgrading from 265 to 285?-akkfr2igsiqgmrws1brxrq-jpg 
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Old 10-26-2020, 06:58 PM #7
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Quote:
Originally Posted by SR52011 View Post
Then maybe I can run 285s with a minor lift and minor trimming on my 4runner!? 🤔
I do.

285/70/17 Firestone Destination ATs (32.7")
1.6" lift in front
Stock OR wheels
Fender liner mod
Caster set at 3.6"

No rubbing, no problems.
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Old 10-26-2020, 09:38 PM #8
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I'm on a 2F\1R inches of lift on a SR5P4x4. Previously had Nitto Terra Grappler G2 tires in stock 265\70\17 31.7", now on Toyo Tires Open Country RT in 285\70\17 33"

Measurements from ground to center of wheel well fender with Nitto 265s 31.7"

Front Driver From Ground 36.125
Front Passenger From Ground 36.25
Rear Driver From Ground 37.5
Rear Passenger From Ground 37.625

Measurements from ground to center of wheel well fender with Toyo 285s 33"

Front Driver From Ground 36.625
Front Passenger From Ground 36.75
Rear Driver From Ground 38.25
Rear Passenger From Ground 38.25

Gained about half inch - 3\4 inch of clearance which matches according to overall tire diameter measurements
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Old 10-26-2020, 09:41 PM #9
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Is there any reference chart or guide of actual tire dimensions for the 265/275/285 range by manufacturer and model?
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Old 10-26-2020, 11:21 PM #10
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The math police would like you to re-compute (see bold)

Good point none-the-less!



Quote:
Originally Posted by Friggin Idiot View Post
Not quite. A tire is 265/70R17, 265mm width, 70% sidewall ratio, 17" wheel.
265 * .7 = 185.5 sidewall height
285 * .7 = 199.5 sidewall height
199.5 - 185.5 = 14.5mm difference, which equates to just under 0.6"
Which is exactly what you get using a Tire Size Comparison Tool
Keep in mind tire sizes can vary manufacturer to manufacturer too. But I can tell you going from a 265 to a 275 was a noticeable difference on a daily driver, and the same again for going to 285 from 275.
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Old 10-26-2020, 11:34 PM #11
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Quote:
Originally Posted by nimby View Post
I do.

285/70/17 Firestone Destination ATs (32.7")
1.6" lift in front
Stock OR wheels
Fender liner mod
Caster set at 3.6"

No rubbing, no problems.
Good to know! I'm gonna go ahead with 285s! I hope 9 inch wide with 1 offset wheels will work as well.
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Old 10-27-2020, 03:13 AM #12
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Quote:
Originally Posted by Moving Chicane View Post
The math police would like you to re-compute (see bold)

Good point none-the-less!
Nice catch. Corrected. That's what I get for trying to do math before I've had coffee.


Quote:
Originally Posted by SR52011 View Post
Then maybe I can run 285s with a minor lift and minor trimming on my 4runner!? 🤔
It's possible, but also very dependent on which tire you're choosing, whether it's at the high or low of the size range, and what you consider minor. To some people a BMC is minor, but there are people who think you're not wheeling properly unless there's a tire in the air or the frame is flexing too!



Quote:
Originally Posted by BlueEyedDevil View Post
Is there any reference chart or guide of actual tire dimensions for the 265/275/285 range by manufacturer and model?
Nope. You might be able to compare tires directly some place like TireRack, but that implies they have the data for your desired manufacturer, tire model, size, and load range available. Their tire information is limited for a lot of the AT tire lines, so I was stuck coming up with my own comparison spreadsheet. Best you can do is go to the manufacturer page for every tire you're interested in and stuff the data all in a spread sheet. It's exactly what I had been accumulating for the majority of the beginning of this year. Sadly I deleted the spreadsheet when I bought the tires, so don't have it to share.
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