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ksurfier

ksurfier

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I recently switched from the Pirelli stock 20" (275-65-R20) to Michelin Defender M/S 2 (275-60-R20).

The Michelin's have a max PSI of 50 versus 80 max on the Pirelli. If I fill to recommended 48 PSI, they end up over 50 after some driving.

Do I need to be concerned?
Definitely not, up to 53 is fine
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I recently switched from the Pirelli stock 20" (275-65-R20) to Michelin Defender M/S 2 (275-60-R20).

The Michelin's have a max PSI of 50 versus 80 max on the Pirelli. If I fill to recommended 48 PSI, they end up over 50 after some driving.

Do I need to be concerned?
No, those PSI are based on cold tire temps.

Are you sure stock was 80? That's normally for LT tires. I thought it was 51 as well.
 

EarlyAdptr

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Are you sure stock was 80? That's normally for LT tires. I thought it was 51 as well.
You are correct sir. On the TireRack site there are 2 Pirelli Scorprian 275/65-R20 tires. The Rivian version is max of 51 PSI.

Thank you!
 

DoubleTake

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@ksurfier Today’s trip from upstate NY to Jersey. 175miles. In NY I was going 70 then in Jersey it was between 55-65. Temps in the 50 outside and battery around 68.

Conserve mode entire trip. Nice to see and I expect to see more in the future as it gets warmer and when I switch to HTS60

Rivian R1T R1S Affordable high efficiency 20" wheels and 33" tires options (275/60R20) IMG_0824


Rivian R1T R1S Affordable high efficiency 20" wheels and 33" tires options (275/60R20) IMG_0823


Rivian R1T R1S Affordable high efficiency 20" wheels and 33" tires options (275/60R20) IMG_0825


Rivian R1T R1S Affordable high efficiency 20" wheels and 33" tires options (275/60R20) IMG_0826
 
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Decided to switch to 34" (275/65/20) Recon Ridge Grapplers 116T. I got a set of the new Black Rhino Voltac rims and the HTS60 just look off on them. Rims look ugly with those tires.

Will post up a set of brand new never driven on 275/60/20 116T General Grabbers HTS60 tomorrow located in Albany NY :) PM if interested.

p.s

Will also have a low mileage set of R800 EV Sportline Rims with the Terrain Contact 275/60/20 I have been getting amazing efficiency with as well. Will post those up once I get my Black Rhinos mounted :)
 

ForeverOnTheWaitlist

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@ksurfier what's your take on Michelin Defender LTX MS2 vs those not-yet-here Geolander CV 4S, or any of the other road centric tires. My first take on the Yokohama was that it intended to be a "great for winter" tire without being in the pure winter category like the Ice-X. So if you were running dedicated winter rubber, maybe they weren't a good fit.

For a pavement centric tire, the Defender still seems like the best option that'll go > 20k miles.
 

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Decided to switch to 34" (275/65/20) Recon Ridge Grapplers 116T. I got a set of the new Black Rhino Voltac rims and the HTS60 just look off on them. Rims look ugly with those tires.

Will post up a set of brand new never driven on 275/60/20 116T General Grabbers HTS60 tomorrow located in Albany NY :) PM if interested.

p.s

Will also have a low mileage set of R800 EV Sportline Rims with the Terrain Contact 275/60/20 I have been getting amazing efficiency with as well. Will post those up once I get my Black Rhinos mounted :)
Make sure to give the grabbers HTS60 at least close to 1K miles before you see the true number. It is very sticky new. My efficiency is sub 2.0 for the first 400 miles or so.
Yea. the 60 size looks beefy. ride is great though. Im taking a 190 miles round trip soon to Norman and will report efficiency with the grabbers
 

DoubleTake

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Make sure to give the grabbers HTS60 at least close to 1K miles before you see the true number. It is very sticky new. My efficiency is sub 2.0 for the first 400 miles or so.
Tires won't ever have a load on them. I am switching to the recons before even putting the new rims on the truck. I understand and am assuming risk of getting a louder tire and worse efficiency than both the HTS60 and the Terrain contact but I am more for the looks at the moment :/
 

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Tires won't ever have a load on them. I am switching to the recons before even putting the new rims on the truck. I understand and am assuming risk of getting a louder tire and worse efficiency than both the HTS60 and the Terrain contact but I am more for the looks at the moment :/
AT tires definitely look better on any trucks. The HTS60 ride is actually better than the Pirelli stock 21" imo.
 

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@ksurfier what's your take on Michelin Defender LTX MS2 vs those not-yet-here Geolander CV 4S, or any of the other road centric tires. My first take on the Yokohama was that it intended to be a "great for winter" tire without being in the pure winter category like the Ice-X. So if you were running dedicated winter rubber, maybe they weren't a good fit.

For a pavement centric tire, the Defender still seems like the best option that'll go > 20k miles.
For pavement, I like the Cooper Discoverer SRX better than the Defender, it's only 2 pounds heavier but has a width of 8.9", more than an inch wider....another option is the Continental TerrainContact H/T (also 8.9"), or can get the Continental in the AT version and 9.4".

While defender is a great option, I have a hard time with such a narrow tire. From experience, narrower tires don't last on EVs due to weight, torque, and handling issues.
Ideally tire tread would be a little wider than the 8.5" rim, say between 8.6" and 9.1".
For width and efficiency the General Grabber HTS60 seems like the best value, while narrow, it at least matches the rim width. If your price of electricity is low enough than you shouldn't worry too much about getting more than 2.2 MPK...

In that case, I would focus on any tire treads >8.9", some examples include:
$239 - (B) Goodyear Wrangler Territory AT (40# and ~2.3 MPK) Range >300 miles
$212 - (B) Cooper Discoverer SRX (42# and ~2.3 MPK) Range >290 miles
$345 - (B) Toyo Open Country R/T Trail (43# and ~2.2 MPK) Range >285 miles
$259 - (C) Continental TerrainContact H/T (44# and 2.2 MPK) Range >280 miles

Rivian R1T R1S Affordable high efficiency 20" wheels and 33" tires options (275/60R20) 1712170379328-xy
 

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Thanks,
Is 115 acceptable now ? (I had a failed install at Costco with 115's last year). If so, is there downside ? I'm not driving aggressively or taking risks on rocky trails fwiw.

I see the Wrangler is 116. Not sure why it wasn't on my tire radar.
 
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I haven’t heard it clear one way or another…ultimately the 20” OEM tire is an SL rating so it seems that opens the door to other SL options. From a load perspective, there are 2 ways you could approach it. 1st, can reduce the max load from ~8,500 to 8,200 pounds running same PSI. 2nd - Could adjust the pressure to correct load. 48/51 psi X 2756 = 2594#. For max load tire of 115 (2679#), 2594/2679 = 96.8% of 51 psi = 49 psi, in the case of 44 max psi tire can just run it at 44/45 psi since it achieves the load rating at lower pressure…

while not rocket science, most tire places don’t want to run the numbers and will just default to same or better ratings of OEM tires…
 

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Decided to switch to 34" (275/65/20) Recon Ridge Grapplers 116T. I got a set of the new Black Rhino Voltac rims and the HTS60 just look off on them. Rims look ugly with those tires.

Will post up a set of brand new never driven on 275/60/20 116T General Grabbers HTS60 tomorrow located in Albany NY :) PM if interested.

p.s

Will also have a low mileage set of R800 EV Sportline Rims with the Terrain Contact 275/60/20 I have been getting amazing efficiency with as well. Will post those up once I get my Black Rhinos mounted :)
That’ll be great to hear another review on the Nitto Recon.
 

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Comment:
- your template is an interesting attempt to standardize, but it doesn't appear to have any accounting for net gain/loss in elevation, which makes a very large difference (as an example, I have a standard section of highway I use for efficiency testing; it is 1.2km long and has an 18m elevation difference - a 1.5% grade. I run tests in both directions and from a test-run yesterday I had 2.54 km/kWh heading uphill and 5.46 km/kWh heading downhill! [My test protocol is to get up to speed, reset trip meter, take the reading at the end of the 1.2km section])

Question:
- why the fixation on tire weight? And you brushed off rolling resistance earlier too....
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