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Unread 07-11-2011, 11:22 PM   #1
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1994 ZJ 
Join Date: Apr 2009
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fixed length control arms

i am looking at buying the IRO fixed length lower arms front and rear. my question is can i get away with only the lowers or do i have to have the adjustable uppers too?

94 ZJ 3.5 benchmark lift, .75 coil spacers 31 x 10.50, rear adjustable track bar

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Unread 07-11-2011, 11:23 PM   #2
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You can do only lowers. I ran only lowers for a while before doing the longarms.
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Unread 07-12-2011, 01:44 AM   #3
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Originally Posted by jnjtrevino View Post
i am looking at buying the IRO fixed length lower arms front and rear.
I'm gonna say this is a mistake for any lift . Buy adjustables for the extra $50ea pr.
1) Adjustability for larger tires and to go higher if desired
2) Re-sale value and ease of sale if upgrading
3) IRO's fixed arms are not a beefy as the adjustables . (I have fixed on my stock 5.9 , Adjustables on my Comanche) Strength ? I'm sure they are comparable
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Unread 07-12-2011, 04:44 AM   #4
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The threaded area on adjustable contol arms significantly compromises strength. That is why adjustables tend to look more beefy.

At the very least you need one pair of adjustables on the rear in order to dial in the pinion angle. Up to about 3" or so, the existing cam bolt adjustment on the front axle can be used to dial in caster/pinion angle and you can get away with fixed length.
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