Hi There, from Mountain Pass Performance

[UnsungZero_OldTimeAdMan]

I am NOT a mechanical engineer (or better yet not a Mechanic) but couldn't you design the long straight "rod" that is the "weak point" to be detachable at BOTH ends so the week link is easily field servicable? I understand for alignment you probably only want adjustment on one end of it, but could instead of the interior side being a bigger piece with more parts, just "unpin/unscrew" long straight "rod" replace and be on your way. For an offroad vehicle the weak link should be cheap and easy to replace in the mud. Not a $500 part that is less than simple (not saying exactly difficult, just involved)

Anything is possible if you ignore cost. There is cost associated with not using an off-the-shelf product from suppliers. There is engineering cost. Manufacturing cost for suppliers to set up tooling and production line specific to just one customer, which means loss of production volume on existing product that they could sell to everyone. And being a lower volume order, all this add up to cost inefficiency. Rivian is not Toyota or GM. It doesn’t have as much clout on suppliers to do things like this. They would have to do it in-house. And that is a cost of its own. Small scale. No economy. It’s just more efficient, for manufacturing and service, to use a readily available and somewhat universal part.

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[NotoriousRIV]

Thought I would drop this here to keep the thread going. Was hoping for something less hardcore off-road focused perhaps like the MPP Mesh Tesla wheels but I get that there's a target market of Rivian owners with an emphasis on offroading.

It appears you are quite interested in towing, efficiency, etc. Thoughts on the increased width of 9.5 in? I would expect the increased weight and width to decrease efficiency. Is the plan for the aero covers to look similar to the prototypes you have shown for the Tesla mesh wheels?

When do you expect to have these in production?

Thanks!

 

[MountainPassPerformance]

Thought I would drop this here to keep the thread going. Was hoping for something less hardcore off-road focused perhaps like the MPP Mesh Tesla wheels but I get that there's a target market of Rivian owners with an emphasis on offroading.

It appears you are quite interested in towing, efficiency, etc. Thoughts on the increased width of 9.5 in? I would expect the increased weight and width to decrease efficiency. Is the plan for the aero covers to look similar to the prototypes you have shown for the Tesla mesh wheels?

When do you expect to have these in production?

Thanks!

Thanks for posting! We're planning on making an official announcement very soon, but wanted to tease them for our Instagram followers first

I believe the 9.5" width will be a good balance as well for those who want improve driving feel and response. A wider wheel always gives more to the driver, as it supports the tire that much better.

As the tire is already much wider than the rim, the overall section width likely won't change so much. We're very interested to see how range is affected, as obviously, that is critically important to us.

If the prototypes pass quality inspection with no issue, then it's likely we'll have wheels shipping to customers this summer. That is the goal!

 

[Kelvn]

Let me know if you need California Based tester for Bronze ones

 

[moosehead]

This may be a bit unrealistic, but could you please be a bit more discreet about this forthcoming wheelset being intended for both Rivian and the Dumpster Truck?

Thank you for your consideration.

 

[UnsungZero_OldTimeAdMan]

IMO, a wider wheel isn't what the off-pavement-minded R1-aftermarket needs. What's needed [more of] is slightly less positive offset than factory, whilst not sacrificing usability in low and lowest ride heights. Wider/bigger is mostly for looks and not necessarily best for off-pavement performance. Thuren Fabrication actually went 0.5" narrower with aim to better protect the rim edges. While it can be driven on a track, this isn't a track toy (like the Z). Other consideration is clearance around the tire valve. Some of us use inflation kits with Milton-M style quick release air chucks.

 

[camaroz1985]

Love the look of the new wheels. Definitely interested!

 

[MountainPassPerformance]

IMO, a wider wheel isn't what the off-pavement-minded R1-aftermarket needs. What's needed [more of] is slightly less positive offset than factory, whilst not sacrificing usability in low and lowest ride heights. Wider/bigger is mostly for looks and not necessarily best for off-pavement performance. Thuren Fabrication actually went 0.5" narrower with aim to better protect the rim edges. While it can be driven on a track, this isn't a track toy (like the Z). Other consideration is clearance around the tire valve. Some of us use inflation kits with Milton-M style quick release air chucks.

This is good feedback, I will check into the quick-release air chucks and try to ensure we accomodate clearance for them.

Regarding wheel width, the offset is the same so the tire will remain in the same position. We do have bolt on "aero cover" holes tapped into the wheels.

This brings me to an idea of some kind of replaceable "outer guard" that could be added to the wheels for serious off-roaders who want the ability to use a slightly wider (better looking, and better for on-road performance), without the risk of more damage on trails.

Thanks for your thoughts!

 

[UnsungZero_OldTimeAdMan]

This brings me to an idea of some kind of replaceable "outer guard" that could be added to the wheels for serious off-roaders who want the ability to use a slightly wider (better looking, and better for on-road performance), without the risk of more damage on trails.

That's a great idea. Rash on a durable and replaceable cover or ring is much easier to deal with/swallow than damaged wheels. Speaking for myself, I already have factory 20s. So what would compel me to upgrade would be an option that is justifiably better than factory (beyond cosmetics), without sacrificing usability (ride heights of various drive modes) or efficiency.

Regarding wheel width, the offset is the same so the tire will remain in the same position. We do have bolt on "aero cover" holes tapped into the wheels.

While tire (same as factory size) may be in same position, because of the wider barrel there will be less ballooning of the sidewall, comparatively less protection for the barrel lips. Less ideal than a narrower rim for off-roading.

Cheers.

 

[jwanderson88]

I'm interested in a tie rod upgrade. I went to the Mountain Pass Performance website and there are no products for Rivians.

 

[MountainPassPerformance]

We'll add some products to the website soon, for now here is a teaser of our first new product that we're looking to release for "beta" testers in the coming weeks!

These are our "Triple L" ride height adjustment pins, also known as "Leveling Links".

These cute guys allow the ability to quickly (within seconds) fine-tune the ride height at each end of the truck to Lift/Lower/Level the vehicle. We'll make a full post about the product early next week and can't wait to hear how the community uses them.

For myself personally, the "Low" drive mode rides on the front bumpstops all the time and is far too harsh, along with 30mm of rake which I don't find very visually appealing.

Raising the front and lowering the rear slightly allows me to fine-tune the bump-stop engagement so that the truck "lands" on the bumpstops evenly rather than crashing over the front axle. In addition, the additional 30mm of front travel means that "crashing" onto the bumpstops happens far less frequently!

When it's towing time, we raise the rear to reduce the amount of sag experienced while towing, as the Rivian doesn't seem to fully compensate for the tongue weight!

 

[MountainPassPerformance]

Oh, and we should mention that we don't advise or recommend running the truck at heights above or below the heights that Rivian has preset in the vehicle. You all can do so at your own risk

 

[Jason C]

We'll add some products to the website soon, for now here is a teaser of our first new product that we're looking to release for "beta" testers in the coming weeks!

These are our "Triple L" ride height adjustment pins, also known as "Leveling Links".

These cute guys allow the ability to quickly (within seconds) fine-tune the ride height at each end of the truck to Lift/Lower/Level the vehicle. We'll make a full post about the product early next week and can't wait to hear how the community uses them.

For myself personally, the "Low" drive mode rides on the front bumpstops all the time and is far too harsh, along with 30mm of rake which I don't find very visually appealing.

Raising the front and lowering the rear slightly allows me to fine-tune the bump-stop engagement so that the truck "lands" on the bumpstops evenly rather than crashing over the front axle. In addition, the additional 30mm of front travel means that "crashing" onto the bumpstops happens far less frequently!

When it's towing time, we raise the rear to reduce the amount of sag experienced while towing, as the Rivian doesn't seem to fully compensate for the tongue weight!

Totally interested!!!

 

[Kelvn]

We'll add some products to the website soon, for now here is a teaser of our first new product that we're looking to release for "beta" testers in the coming weeks!

These are our "Triple L" ride height adjustment pins, also known as "Leveling Links".

These cute guys allow the ability to quickly (within seconds) fine-tune the ride height at each end of the truck to Lift/Lower/Level the vehicle. We'll make a full post about the product early next week and can't wait to hear how the community uses them.

For myself personally, the "Low" drive mode rides on the front bumpstops all the time and is far too harsh, along with 30mm of rake which I don't find very visually appealing.

Raising the front and lowering the rear slightly allows me to fine-tune the bump-stop engagement so that the truck "lands" on the bumpstops evenly rather than crashing over the front axle. In addition, the additional 30mm of front travel means that "crashing" onto the bumpstops happens far less frequently!

When it's towing time, we raise the rear to reduce the amount of sag experienced while towing, as the Rivian doesn't seem to fully compensate for the tongue weight!

Alignment required?

 

[MountainPassPerformance]

Alignment required?

If you're running at a ride height significantly different from when the vehicle was initially aligned, and plan to put on a lot of miles with that difference in height, it's a good idea to get the vehicle aligned.

I believe (correct me if I'm wrong) that Rivian vehicles are aligned at the "Standard" ride height. So if one were to make adjustments to ride height and stay close to that height, no alignment would be needed.

However, if you're often using the vehicle in "low" mode it would certainly pay off to get an alignment - you'll save your money back in tire life most likely!

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