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Air Ride Suspensions \  Tri 4-link Bars

Tri 4-link Bars

Air Ride Suspensions Q & A
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replies 6
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jrhall19   +1y
When running a triangulated 4-link does it matter if the bars are the same length, or do the bottom bars need to be longer then top or does it even make a diff. Thanks for any help.
TheMansPuppet   +1y
Yes it does matter what the length of the upper bars. BIOMAX would point you in the right dirrection on the math invovled
BioMax   +1y
I think this question will soon be up there with the reverse 4-link and 2 link questions...

No, the bars do not need to be a specific length, you need to read through the questions that were asked and answered on the 4-link "sticky." If you still have questions, let me know.
jrhall19   +1y
See what I'm trying to figure out is on a triangulated 4 link can all 4 bars be the same length or will this cause a problem.
slammeddime   +1y
It won't cause problems, but its definitely not necessary as so many people claim.
mindlissmetalfab   +1y
Ideally the bars will appear to be the same length when viewed from the side (2d).
To do this, the uppers will actually need to be slightly longer then the lowers to compensate for the triangulation.
But you can have a setup that is perfectly fine that doesn't meet these requirements. As long as you take the time to set it up properly you can have a setup with shorter upper bars and minimum pinion angle change. My truck has shorter uppers then lowers. I see maybe 3 degrees pinion change from layed out to about 8" of lift. After that, it starts to get kind of drastic, but I know I wont be driving higher then 8" lift anyways so it doesnt worry me.
BioMax   +1y
They're right. There is nothing that says that the bars need to be the same length. Triangulated or not, from a side viey is all that matters. If it is necessary that the bars need to be different lengths, try to make the uppers bars shorter. Longer uppers bars can create some weird instantcenter changes and should be used to make specific tuning changes. Not so much of a concern on a mini, but should still be layed out on paper to make sure there isn't any unwanted geometry changes.
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