*PRE-SALE* on now for MPP Ultra Stainless Steel Brake Lines (R1T / R1S)

[MountainPassPerformance]

We love our R1T so much, and it's been a lot of fun to develop new stuff for. Among our favorites: our new brake lines!

We partnered with HEL Performance again (They also help make our Tesla brake lines) to deliver a truly stainless steel brake line - including the fittings and bolts, which are typically among the first things to corrode and/or rust.

One of the main reasons we developed these was because of what we saw the first time we took the wheels off our R1T to inspect everything. Some of you have probably noticed it as well - the rear brake line is overstretched and strained when the car is in the air. We figure this was an innocent mistake by an engineer at Rivian, who most likely didn’t account for all of the bushing deflection in the damper top hats and suspension links that result in more suspension droop in real life than the design would have shown. For practical purposes, that absolutely will not do, and it's something we hope Rivian addresses in the future. Until then, we decided to be the change we wanted to see.

We're opening up the pre-sale of our MPP Ultra Stainless Steel Brake Lines for the Rivian R1T and R1S. This is the best price they'll be unless they appear on a big Black Friday sale in the distant future!

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[FutureTruck]

straingate incoming

 

[MountainPassPerformance]

straingate incoming

?

 

[SolartoEV]

How does the average consumer bleed the lines after purchasing these?

 

[bmedfo1]

Love that your making real performance parts for the Rivian! Fingers crossed for some lightweight Brake Rotors soon. Whenever that Gen 2 quad hits the market we are going to be in even more need of aftermarket performance parts.

 

[Foobar]

Is Rivian Yellow a color option?

 

[MountainPassPerformance]

How does the average consumer bleed the lines after purchasing these?

Just like any other brakes from another vehicle! There's nothing special, and they're easy to bleed.

 

[MountainPassPerformance]

Is Rivian Yellow a color option?

There is a yellow and a gold option available, but I don't know for sure that either one will exactly match Rivian's yellow. I'll have to talk to them about that

 

[R1Thor]

?

I mean...
I guess you could use some fear tactics to try to convince people that your photo shows a 'bad' situation.

I'd just like you to pause for 5 seconds to consider the enormous amount of PSI these systems are rated for. (Google it. I'll wait. Didn't feel like it? OK, it's not uncommon for these systems to see upwards of 1000 psi. That little bit of ... 'stretch' [and it's a stretch to call it that, from my perspective--looks like it's simply at its end length--you know, AS designed by engineers] is adding nothing that brake line cannot handle within a VERY comfortable safety factor.)

Ask yourself if you really think that 'straight line' it's making right there is really inducing an appreciable strain that needs engineered out.

I'd also consider that Rivian's braking systems are designed by Brembo. They kinda know what they're doing. Just my .02.

Also, I use regenerative braking 99.2% of the time.
i'm a sucker for performance parts. I verily am. But this... seems completely superfluous to me.

 

[Phatman113]

Jounce lines next?

 

[MountainPassPerformance]

@R1Thor Couldn't agree more with hating fear mongering tactics and snake oil salesman. It boils our blood and we find ourselves fighting against it regularly!!

In this case though, any time a hydraulic hose is strained right out of the fitting it gives us heart attacks. Maybe that's because I've personally experienced a brake line failure (an OEM brake line) and nearly rear ended another vehicle due to it, or maybe it's because I've seen too many videos of construction equipment having hydraulic hoses fail!

When I have some time I'll dig up the service manual for a number of vehicles to show that ALL manufacturers strongly advise against ever even hanging a brake caliper from a brake line, much yet significant weight from the vehicle's suspension.

Regarding pressure - you're right, it's actually closer to 2000psi for large vehicles! However, over a very small cross section (around 3/16") - that only works out to about 50lbs of evenly distributed force. The problem with strain is that it's pulling on only one side of the hose.

Regarding Brembo, I will wager a pretty large bet no one at Brembo gladly signed off on brake lines looking like that ?

But - we have to agree. If Rivian felt this was a serious safety issue I'm sure they would have resolved it and not let the vehicles out. This is something that will may cause problems years don't the road, but we don't want to suggest that every Rivian down the road is at imminent threat of brake failure unless they buy our brake lines. So apologies if that's how you interpreted our post.

From a quick Google search:

 

[R1Thor]

@R1Thor Couldn't agree more with hating fear mongering tactics and snake oil salesman. It boils our blood and we find ourselves fighting against it regularly!!

In this case though, any time a hydraulic hose is strained right out of the fitting it gives us heart attacks. Maybe that's because I've personally experienced a brake line failure (an OEM brake line) and nearly rear ended another vehicle due to it, or maybe it's because I've seen too many videos of construction equipment having hydraulic hoses fail!

When I have some time I'll dig up the service manual for a number of vehicles to show that ALL manufacturers strongly advise against ever even hanging a brake caliper from a brake line, much yet significant weight from the vehicle's suspension.

Regarding pressure - you're right, it's actually closer to 2000psi for large vehicles! However, over a very small cross section (around 3/16") - that only works out to about 50lbs of evenly distributed force. The problem with strain is that it's pulling on only one side of the hose.

Regarding Brembo, I will wager a pretty large bet no one at Brembo gladly signed off on brake lines looking like that ?

But - we have to agree. If Rivian felt this was a serious safety issue I'm sure they would have resolved it and not let the vehicles out. This is something that will may cause problems years don't the road, but we don't want to suggest that every Rivian down the road is at imminent threat of brake failure unless they buy our brake lines. So apologies if that's how you interpreted our post.

From a quick Google search:

Fair enough. Well thought out reasoning and well articulated.

 

[shracks]

I'm not sure I understand the problem these lines are solving? Or maybe I'm un-aware of the background of said "strain-gate?"

Not knowing the background, these new lines only fix an issue at full droop? Which would occur at full tilt offroading or when changing a tire? IDK. It'd seem to me that you could fashion a caliper hanger to latch onto the upper control arm to take strain off when changing tires or working on the brake system.

Regardless, I appreciate the availability of aftermarket parts for these vehicles.

 

[jfoonly]

Can you post a similar picture with the wheel removed and the new lines installed?

 

[MountainPassPerformance]

Here's a picture of the line installed at full droop.

Because the R1 doesn't have traditional anti-roll bars, the droop will likely be the same whether it's jacked up by one side or lifted on a hoist. We'd have to measure that to confirm 100% as it would depend what the hydraulic anti-roll system is doing when stationary.

@shracks Stainless steel brake lines are a popular upgrade for all kinds of vehicles for several reasons! Solving this full droop strain issue is an added benefit for this platform.

And yes. One of us did poke the airbag cover and accidentally put a dimple in it. And no, we can't get it to go back. It's maddening!!!

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