20" Inch New Goodyear 20” tire option - available when?

[B Digs]

Hi all, here is some additional info from a Goodyear expert…

Some publicly managed areas where off-roading is permitted require that tires be partially deflated when driving on Sand. Many actually specify between 15-20 PSI, and maximum speeds from 10-15 MPH.
Running at this reduced inflation itself will not cause tire damage at these speeds.

The lower inflation also allows the tire to ride closer to the surface of the sand and reduce the drag, improving battery life under those conditions.

The deflation creates a significantly longer and slightly wider footprint. This both reduces erosion of the dunes, and decreases the depth of the ruts created and the severity of washboard.

If deflation is needed under this low speed off pavement condition, it is very important that the tires be reset to the proper placard inflation pressure before traveling on paved roads. Fortunately your Rivian should have a compressor on board to meet that need.

Sponsored

 

[Riviot]

Hi all, here is some additional info from a Goodyear expert…

Some publicly managed areas where off-roading is permitted require that tires be partially deflated when driving on Sand. Many actually specify between 15-20 PSI, and maximum speeds from 10-15 MPH.
Running at this reduced inflation itself will not cause tire damage at these speeds.

The lower inflation also allows the tire to ride closer to the surface of the sand and reduce the drag, improving battery life under those conditions.

The deflation creates a significantly longer and slightly wider footprint. This both reduces erosion of the dunes, and decreases the depth of the ruts created and the severity of washboard.

If deflation is needed under this low speed off pavement condition, it is very important that the tires be reset to the proper placard inflation pressure before traveling on paved roads. Fortunately your Rivian should have a compressor on board to meet that need.

How about 20-35psi PSI but at speeds up to 40mph?

 

[jlstan]

I don't think any Tire Company with a functioning legal department is going to say "Hey, go f'ing crazy" on the tire pressure thing. I do appreciate the (very rote, liability-reducing) response above.

 

[B Digs]

How about 20-35psi PSI but at speeds up to 40mph?

The previous post addressed mandated lowering of tire pressures to protect the fragile sandy environment, beaches, and dunes where off-roading is permitted.

The images shown above could be examples of oversized tires on dedicated off-road vehicles that are trailered to and from events. Other than certain military and dedicated off-road vehicles, running at higher speeds with lower inflations is not recommended.

 

[usulio]

I don't think any Tire Company with a functioning legal department is going to say "Hey, go f'ing crazy" on the tire pressure thing. I do appreciate the (very rote, liability-reducing) response above.

Saying 15-20 PSI is already more aggressive than Rivian would say with the AT Pirellis where ~30 PSI was the lowest they'd recommend. Granted that wasn't specific to sand and low speeds.

One thing about air pressure is people like to talk about PSI as if it's the same between vehicles. But a heavier vehicle like the Rivian will have a larger footprint at the same PSI. Or it would need a higher PSI to get the same footprint.

 

[LL75]

Well they mounted and balanced the tires to the wheel. The installation they couldn’t do. Apparently with atomic wheels you need a thin spline (thin socket). They didn’t have it so they mounted and balanced the wheels and threw them in the back of my truck bed. I ended up having what I needed to install my wheels and tires. Loving the look of AT on my truck.

What is your efficiency so far with these? Anything like what Brian get?

 

[emlo]

What efficiency was Brian getting? I’ve done about 300 miles getting about 1.7 Mi/Wh. On my 21” oem I was at about 2.68 Mi/Wh over 1500 miles.

 

[josh0]

What efficiency was Brian getting? I’ve done about 300 miles getting about 1.7 Mi/Wh. On my 21” oem I was at about 2.68 Mi/Wh over 1500 miles.

On a dual-motor max pack? (I’m guessing from your signature.)

Almost 1 mpk drop seems pretty significant. I’ve got the same configuration, and want to maintain my range for long road trips, so I keep going back and forth on changing the tires (I also want 3PMSF and better dirt road handling).

 

[shap]

What efficiency was Brian getting? I’ve done about 300 miles getting about 1.7 Mi/Wh. On my 21” oem I was at about 2.68 Mi/Wh over 1500 miles.

I did 3k miles recently, on Texas roads, so 85 mph on many of them. Average consumption was 2.22 (standard height, All Purpose 90%, GEN1 QM)
I think I lost about 6% compared to the stock 21". However, these tires are way better quality - after 4k miles I see no visible imperfections on the tires, while my 21" has many. Seems GY tires are much sturdier while the actual ride is softer.

 

[LL75]

What efficiency was Brian getting? I’ve done about 300 miles getting about 1.7 Mi/Wh. On my 21” oem I was at about 2.68 Mi/Wh over 1500 miles.

Wow that is very low. I think brian is getting in the 2.3 to 2.4 range

 

[LL75]

I did 3k miles recently, on Texas roads, so 85 mph on many of them. Average consumption was 2.22 (standard height, All Purpose 90%, GEN1 QM)
I think I lost about 6% compared to the stock 21". However, these tires are way better quality - after 4k miles I see no visible imperfections on the tires, while my 21" has many. Seems GY tires are much sturdier while the actual ride is softer.

That is good number on all purpose mode

 

[emlo]

Wow that is very low. I think brian is getting in the 2.3 to 2.4 range

I’m very disappointed but I’ll give it a few hundred more miles

 

[josh0]

Wow that is very low. I think brian is getting in the 2.3 to 2.4 range

I’ve averaged 2.45 on the stock 21s, so if it’s even remotely possible to get 2.4 with the Goodyears, that would be amazing.

 

[josh0]

I’m very disappointed but I’ll give it a few hundred more miles

What wheels do you have? Looks like maybe the Voltaic Rhinos from the picture? Could be a factor, though that still seems like a pretty extreme drop to be caused be wheels.

 

[emlo]

Don’t think it’s the wheels alone (but these are forged wheels) and going AT is what is killing my efficiency. The wheels are atomic borrowing the rhino design.

Sponsored