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Most efficient 20" tire?

R1Sky Business

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Which 20" tire is the most efficient?

Or closest to the OEM 21" efficiency?

Thank you all.
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Runamok

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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.
 
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R1Sky Business

R1Sky Business

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Not sure, here are some measuring stick tires

General Grabber HTS 60 - Stock+ efficiency, Inexpensive, lightweight 34#,
Michelin Defender LTX MS/2 - Stock efficiency, 70K Warranty, great performance
Michelin Defender LTX Platinum - Stock- efficiency, 70K warranty, great AT sidewall look
Stock 20 or 21?
 

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The EU has a labeling requirement to identify the fuel efficiency of tires. It seems the US does not have one that is enforced? The only thing I found online was an NHTSA "Final Ruling" from 2010 (lol) requiring it to be done in the US, but I've never seen it. TireRack does not have any fuel efficiency specs that I could find.

Has anyone ever seen this label in the wild?
Rivian R1T R1S Most efficient 20" tire? 1707705123647
 

Runamok

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Stock 20 or 21?
The above are all 20" tires. When I say "stock efficiency," I am referring to the Rivian's stock 21" tires. Summary, It seems possible to beat the 21" Pirelli's on efficiency. However most are just equaling them and beating them up where the Pirelli's fall short, longevity and noise.
 

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Not sure, here are some measuring stick tires

General Grabber HTS 60 - Stock+ efficiency, Inexpensive, lightweight 34#,
Michelin Defender LTX MS/2 - Stock efficiency, 70K Warranty, great performance
Michelin Defender LTX Platinum - Stock- efficiency, 70K warranty, great AT sidewall look
From the thread discussing the platinums it seems they’re closer in efficiency to the pirelli AT tires not the stock 21 AS tires.
 

Runamok

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From the thread discussing the platinums it seems they’re closer in efficiency to the pirelli AT tires not the stock 21 AS tires.
Agreed. Not obvious in my list, but have them as "Stock-" ... minus sign for under stock.
 

JJE

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Agreed. Not obvious in my list, but have them as "Stock-" ... minus sign for under stock.
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.
 

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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.
How is the wears compared to the stock 21" Pirelli? I'm at 15K and it's about time to get a new set. Very disappointed at the pirelli so far.
 

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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.
 

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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.
If I may ask, what were you getting previously? Did you go with 60 aspect ratio or 65?
 

LL75

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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.
is that the same with the 21" or worse?
 

Riviot

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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.
Ditto. Peaked at 2.55mi/kWh commuting when previously getting 2.1 at best on Pirelli ATs.
 

UnsungZero_OldTimeAdMan

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The EU has a labeling requirement to identify the fuel efficiency of tires. It seems the US does not have one that is enforced? The only thing I found online was an NHTSA "Final Ruling" from 2010 (lol) requiring it to be done in the US, but I've never seen it. TireRack does not have any fuel efficiency specs that I could find.

Has anyone ever seen this label in the wild?
1707705123647.png
ACME? Anvil rated? 😄

To OP, no one person has done comprehensive scientific testing. No one knows which 20” tire is most efficient. You have to put in the time to read up the select tires others have tried and take your own chances.
 

kurtlikevonnegut

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If I may ask, what were you getting previously? Did you go with 60 aspect ratio or 65?
60 aspect to match the diameter of the 21s. That efficiency is comparable to what I was getting with the 21s. I don't have a lot of recorded data, but what I do have shows 2.2 mi/Kwh in conserve at 75mph and I've seen previously that conservate mode adds 15ish% efficiency over all purpose at that speed.
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