Gen 2 tie rods stronger than Gen 1?

[jfoonly]

Could you share those part numbers?

Yeah, sorry, pics & invoices were on my old phone and it's such a pain to post pictures here since the forum hates firefox and chrome is so klunky at it.

Old M14: PT00001954-E

New M16: PT00038426-E

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[Singletracker]

These two tie rods don’t even look the same. It would seem that a quick look, without needing to actually measure, would give a person the answer as to which size they have. However, the boot may preclude that visual. So, which is the newer, beefier version? The other $64K question is, when in 2023 did they make the change? My R1T was a July build with delivery in early September.

 

[superfluid]

Got second-generation tie rods retrofitted. Posted here.

https://www.rivianforums.com/forum/...e-rods-to-stronger-gen-2-16mm-tie-rods.44916/

 

[UnsungZero_OldTimeAdMan]

I know that the tie rods changed sometime in 2023. I have a Gen 1 2023 R1S and ordered some tie rod braces (Busterbrace from Broncbuster) for off roading. The braces did not fit my larger braces and the original design of the tie rods were used as a template for the braces.

What is your build date?

 

[risingphoenix]

What is your build date?

08/23
BTW, I put the Broncobrace on the 16mm tie rods and they only fit if I purchased longer M6 bolts. I off road in Colorado and really, really don't want to bust a tie rod on a 7200 lb vehicle. Plus having the braces can be very useful in rescue and recovery situations (which I am involved in) for other vehicles. I know the risks for the steering rack so no need to comment on that potential.

 

[BrentInCO]

08/23
BTW, I put the Broncobrace on the 16mm tie rods and they only fit if I purchased longer M6 bolts. I off road in Colorado and really, really don't want to bust a tie rod on a 7200 lb vehicle. Plus having the braces can be very useful in rescue and recovery situations (which I am involved in) for other vehicles. I know the risks for the steering rack so no need to comment on that potential.

Thanks for this. I bought the same because of the info you’ve posted, and installed tonight.

 

[an-thu-knee]

Adding a data point. My R1T was built in May 2023, and I confirmed it has the older M14 tie rods.


What's confusing to me, is that the newer ones don't look any beefier... The thinnest point is just as thin which is where I would assume it would fail.

 

[risingphoenix]

Adding a data point. My R1T was built in May 2023, and I confirmed it has the older M14 tie rods.


What's confusing to me, is that the newer ones don't look any beefier... The thinnest point is just as thin which is where I would assume it would fail.

I can confirm that the newer ones are actually beefier. The Broncobrace was designed for the older m14 tie rods and they won't quite fit (I had to get longer bolts) around my R1S 2023 build with the new ones.

 

[UnsungZero_OldTimeAdMan]

I can confirm that the newer ones are actually beefier. The Broncobrace was designed for the older m14 tie rods and they won't quite fit (I had to get longer bolts) around my R1S 2023 build with the new ones.

Care to share specifics on the longer bolts?

Adding a data point. My R1T was built in May 2023, and I confirmed it has the older M14 tie rods.


What's confusing to me, is that the newer ones don't look any beefier... The thinnest point is just as thin which is where I would assume it would fail.

That may be so but it matters where the thinnest part is. From a past thread 16mm dia. equates to 30% increase in cross-section. That’s a significant increase in torsion strength.

 

[risingphoenix]

Care to share specifics on the longer bolts?


That may be so but it matters where the thinnest part is. From a past thread 16mm dia. equates to 30% increase in cross-section. That’s a significant increase in torsion strength.

I just purchased an M6 bolt kit on Amazon (https://www.amazon.com/dp/B0B9J4GRP3?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_3&th=1) and used one of those sizes that fit well. Don't remember which length worked off the top of my head. Let me know if you want the exact length and I can take one off and measure but this above kit has the one I used. Kinda surprised Broncobuster hasn't upgraded the pattern to the newer size as it's been awhile since the change.

 

[an-thu-knee]

Care to share specifics on the longer bolts?


That may be so but it matters where the thinnest part is. From a past thread 16mm dia. equates to 30% increase in cross-section. That’s a significant increase in torsion strength.

Right but that's what I mean. The thinnest section is just as thin. Not where the threads are

 

[risingphoenix]

Right but that's what I mean. The thinnest section is just as thin. Not where the threads are

Incorrect. See my post above.

 

[an-thu-knee]

Incorrect. See my post above.

the thinnest section is the same on both the old and new ones...

However after doing some more research, the first point of failure is usually at the threads. So knowing this, I can see how the new ones are still stronger.

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