20" Nitto Recon Grappler AT tires 25% more efficient than Pirelli OEM AT! The holy grail!

[moonjeong]

Does it make a difference on noise or efficiency on which sidewall design is on the outside versus inside?

Thanks for all the tire information on this and other threads!

I don’t think it makes a difference at all.

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[LL75]

That's me. I am running with Nitto Recon Grappler XL in 275/60/20. They are ATs. So, they certainly won't be as efficient HTS60.

Will report back with some stats at 1K miles. Give me two weeks? But, preemptively, not as efficient as the 21" Pirelli AS (expected) ... not sure where they sit in the ol' AT hierarchy. Need more data.

Yeap. True data will be at 1k miles on most of these tires. My hts60 was sub 2.0 for a good 300 or 400 miles new.

 

[racekarl]

That's me. I am running with Nitto Recon Grappler XL in 275/60/20. They are ATs. So, they certainly won't be as efficient HTS60.

Will report back with some stats at 1K miles. Give me two weeks? But, preemptively, not as efficient as the 21" Pirelli AS (expected) ... not sure where they sit in the ol' AT hierarchy. Need more data.

Would you be willing to put it in a different thread? This thread started as a discussion of 275/65 tires on 20" wheels. It's confusing when people cross post about different tire sizes because the baseline OEM efficiency is different and we don't fully know how the programming of the vehicle for different OEM wheel/tire combos affects the reported metrics, either.

 

[CJdergroße]

I don’t see they even carry nitto at my local store. Can you post your receipt, were they special order?

I went to Les Schwab tire, (they were cheaper than Americas/Discount Tire). They had to order them - got them within a day.

So far <500 mi, mileage is the same(?), but my Pirelli's had 31k on them, so lack of tread? Also the ride feels noticeably softer/improved, so I'm happy already. Does not wallow or feel less stable, but I don't race this 7000lb truck like I did my previous performance cars

 

[caiudalmau]

Joined team grappler yesterday. Went with 275/65/20 in the SL. TBD on mileage. Initial thoughts are that they feel softer than scorpions.

To be honest more interested to see how they do in the snow. Just drove back from mammoth in storm Friday with 0 issues and according to discount tires I had 4/32s left on the scorpions. Put 23,050 on them thus the switch to something else.

Any update on efficiency/range?

 

[Jblaze121]

Any update on efficiency/range?

Negative.
I dropped it off at Rivian for an alignment the next day, and they still have it.

Apparently my hood shake is not the normal fix and had some hinge issue requiring replacement and body shop work.

I will say that my loaner truck is pretty smooth on the 21s and has better efficiency. It will be a fun transition going back to A/T s .

I'll do a bunch of trips once I have it back.

 

[White Shadow]

What’s your elevation? Want to see if everyone with higher than 2.0 are still j high elevations….

Why would that make any difference in an EV? Unless maybe because one would tend to use more heat at higher altitudes. Other than that, what's the difference for an EV?

 

[swhme]

Why would that make any difference in an EV? Unless maybe because one would tend to use more heat at higher altitudes. Other than that, what's the difference for an EV?

thinner air, less air resistance.

 

[White Shadow]

thinner air, less air resistance.

I don't think thinner air is going to make any real difference in efficiency for an EV. For ICE, of course because it messes with the air/fuel ratio. But if you're saying that an EV will cut through thinner air easier, then I'll have to disagree. If there's any difference at all, it would be far too small to measure in any way. I'd be open to anyone who can prove me wrong.

 

[jjswan33]

This results in max load of ~9,920# (15.9% above the max load limit Rivian lists at ~8,560#).
XL rated tires do not exist below 116, and similarly, almost no SL rated tires exist above 115...
Derating 113, 114, and 115 SL tires yields the following load limits 2281#, 2341#, and 2411#. Applied to the full load of the vehicle means saftey factors are very low (6 - 13%).

You need to look at the per axle ratings. On the Rivian the rear axle is at 4960 lbs meaning your tire needs to have 4960/2 = 2480 lbs

 

[richpike]

I don't think thinner air is going to make any real difference in efficiency for an EV. For ICE, of course because it messes with the air/fuel ratio. But if you're saying that an EV will cut through thinner air easier, then I'll have to disagree. If there's any difference at all, it would be far too small to measure in any way. I'd be open to anyone who can prove me wrong.

Living at 6500ft above sea level and regularly driving to closer to sea level, it does make an impact. I think the key difference is EV efficiencies are so driven by aerodynamics (think towing a trailer with an EV- it's not the weight that matters, it's how aerodynamic the trailer is), that thinner air (at 6,500ft ours is ~20% less dense) actually does matter. It's not a huge impact - around 5% that I've seen. But enough to be noticeable.

-Rich

 

[moonjeong]

I don't think thinner air is going to make any real difference in efficiency for an EV. For ICE, of course because it messes with the air/fuel ratio. But if you're saying that an EV will cut through thinner air easier, then I'll have to disagree. If there's any difference at all, it would be far too small to measure in any way. I'd be open to anyone who can prove me wrong.

It actually has big impact. I’m at 1500 feet and when I go to sea level I lose about 5%

 

[moonjeong]

Why would that make any difference in an EV? Unless maybe because one would tend to use more heat at higher altitudes. Other than that, what's the difference for an EV?

Just like a golf ball flies farther in higher elevation… less air density = lower drag. Imagine in out space there’s no air - then drag is non existence

 

[moonjeong]

I don't think thinner air is going to make any real difference in efficiency for an EV. For ICE, of course because it messes with the air/fuel ratio. But if you're saying that an EV will cut through thinner air easier, then I'll have to disagree. If there's any difference at all, it would be far too small to measure in any way. I'd be open to anyone who can prove me wrong.

https://www.wrcwings.tech/2019/03/0...To quantify the effect, we,to be around a 22%.

 

[goldburger]

I think wind is the most important variable. Sin


Anyone in here currently running this tires 275/60/20? Maybe my next set after the HTS60 grabber is running out.

Yes. For the last 10k miles.

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