Most efficient 20" tire?

[SkiLizardHead2]

As a data point I did a short hwy efficiency test over the weekend for the Michelin Defender M/S2. 75 mile trip on the interstate. Set cruise at 75mph, normal ride height, all purpose mode, with light rain.

Averaged 2.02 mi/Kwh.

wet road surface will increase rolling resistance and reduce vehicle efficiency.

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[SkiLizardHead2]

this attached spreadsheet was posted about 6 months ago so may be a bit outdated. shows tires for Rivian sizes but no efficiency data - which is difficult to find. My experience with other vehicles indicate the M Defender LTX as excellent efficiency and can do light offroad travel such as class 1-2 4wd trails - but I do not have quantitative efficiency data. i will probably switch to D LTX M/S2 once my RIS refresh is delivered. And for serious snow/ice travel will use some M X-Ice - which I have first hand experience on my MX - excellent efficiency and snow/ice traction.

 

[Rgrin]

America's Tire (what they call Discount Tire in California) shows EV efficiency when I click on details for a specific tire. Below is for the MICHELINDEFENDER LTX M/S2P 275 /60 R20 116H XL BSW Item #127371

 

[Supratachophobia]

Not entirely sure. Here are some measuring stick tires.

General Grabber HTS 60 - Stock+ efficiency, Inexpensive, lightweight 34#
Pirelli Scorpion AS +3 - Stock efficiency, affordable.
Michelin Defender LTX MS/2 - Stock efficiency, 70K Warranty, great performance
Michelin Defender LTX Platinum - Stock- efficiency, 70K warranty, great AT sidewall look, pricey, heavy.

Thank you for replying and not sending OP to the Google sheet or the 20 page thread.

 

[Supratachophobia]

As a data point I did a short hwy efficiency test over the weekend for the Michelin Defender M/S2. 75 mile trip on the interstate. Set cruise at 75mph, normal ride height, all purpose mode, with light rain.

Averaged 2.02 mi/Kwh.

Ouch

 

[goldburger]

I am running the Pirelli AS Plus 3 tires on 20 inch rims (275/60/20) and getting range and efficiency essentially identical to the 21s. About 350 mile range/2.45 m/kmh average in mixed driving.

too baad the chain stores won't install them and i don't wanna drop off at a mom and pop spot who's never lifted a rivian

 

[goldburger]

America's Tire (what they call Discount Tire in California)

Flip it...

 

[SkiLizardHead2]

America's Tire (what they call Discount Tire in California) shows EV efficiency when I click on details for a specific tire. Below is for the MICHELINDEFENDER LTX M/S2P 275 /60 R20 116H XL BSW Item #127371

I'm in Colorado on the Discount Tire site and do not see the details link you mention - to see ev range influence

 

[joshuaali]

this attached spreadsheet was posted about 6 months ago so may be a bit outdated. shows tires for Rivian sizes but no efficiency data - which is difficult to find. My experience with other vehicles indicate the M Defender LTX as excellent efficiency and can do light offroad travel such as class 1-2 4wd trails - but I do not have quantitative efficiency data. i will probably switch to D LTX M/S2 once my RIS refresh is delivered. And for serious snow/ice travel will use some M X-Ice - which I have first hand experience on my MX - excellent efficiency and snow/ice traction.

That's just a dump of the spreadsheet posted here: https://www.rivianforums.com/forum/...for-each-rivian-factory-wheel-diameter.19563/

I'm in Colorado on the Discount Tire site and do not see the details link you mention - to see ev range influence

Same for me for the linked tire. I even went through their Treadwell wizard. I can, however, see it for a very small number of OEM size tires.

 

[kurtlikevonnegut]

Ouch

I'm not sure what you mean? 2.02 mi/Kwh at 75mph in All purpose at standard ride height is right on par with what I'd get on 21" OEM. In Conserve I'd be looking at close to 2.4 mi/Kwh at 75 mph and probably 2.5+ at 70.

 

[Spaceball1]

Flip it...

Took me a minute too, but he wrote it right if you read it 3 times like I did ?

America’s Tire “is what they call Discount Tire I’m CA” ?

 

[goldburger]

Took me a minute too, but he wrote it right if you read it 3 times like I did ?

America’s Tire “is what they call Discount Tire I’m CA” ?

Lol I just reread it he did say it right. Haha.

 

[ksurfier]

Bumping this thread since good efficiency discussion…

 

[UhOh]

I know this has been asked a hundred times, but here goes: do we know which is "the most efficient 20" tire"? The more I read about this, the more confused I get.

I am not interested in cost -- just the tire that will produce the longest range. The Grabber and Recon Grappler seem great, but are they more efficient than the Defender LTX? Or the Pirelli Scorpion A/S?

I suppose it's impossible to know until someone does careful tests with each tire?

 

[ksurfier]

There’s two 20” sizes:
34” (2022+ OEM) - 275/65R20
33” (2024+ OEM) - 275/60R20
Some 33” options match or even beat the 21” OEM efficiency (likely why it was discontinued)

33” is most efficient, any tire ~41-42 pounds or less should be high efficiency.

34” - So far I don’t believe there are any 34” diameter tires that match or beat OEM efficiency (there is pretty limited testing data).

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