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Unread 11-26-2011, 08:34 AM   #1
LJ-ROD
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Rough Country suspension lift question

So I bought an '05 LJ thinking that it had the Rough Country 2.5" suspension lift (just the $300 coil lift) and 32" M/T tires. I realized yesterday that my tires were 31x10.50s instead of 32x11.50s. That's embarrassing, because I trusted the guy I bought it from when he told me it had 32" tires and a 2.5" lift and have been telling people that.

Anyway, when I looked at the springs today, they didn't match the picture of the springs on the RC website. I have the correct shocks, but the springs are black (they look stock). Since I don't know when it was installed, I'm hoping that maybe the springs are an older model and maybe used to be manufactured in black.

Question is: With a Rough Country 2.5" coil lift, how much clearance should I have over 31" tires? My current clearances are - (front) 5" between the tire and fender flare, 20.5" fender flare to wheel center, 35" fender flare to ground. (back) 6" fender flare to tire, 21.5" ff to wheel center, 36" to ground.

Does anybody know what my clearances should be if I have a 2.5" lift?

Thanks!

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Unread 11-26-2011, 09:17 AM   #2
Unlimited04
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don't rely on the tire to the fender flare as a lift measurement. terrible idea due to so many variances involved.

look at the bumpstop height & spring length instead. look in the stickied FAQ, or the Boot Camp tech thread linked in my sig, and reference the tables for determining these values.
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Unread 11-26-2011, 09:23 AM   #3
RubiconRazorbac
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I had those springs on a bone-stock Rubi. They sagged horribly. I only ended up with a little over an inch of lift & gave the springs away after only 6 months.

X2 the above on checking lift at the bumpstops.
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Originally Posted by Imped View Post
Your shaft isn't long enough to handle that kind of droop...
My build thread: http://www.jeepforum.com/forum/f9/ru...thread-792423/
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Unread 11-28-2011, 09:51 AM   #4
LJ-ROD
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Quote:
Originally Posted by RubiconRazorbac View Post
I had those springs on a bone-stock Rubi. They sagged horribly. I only ended up with a little over an inch of lift & gave the springs away after only 6 months.

X2 the above on checking lift at the bumpstops.
How much extra weight did you have on it? All I have now is a bumper and rockers... surely it wouldn't sag with just that?

Haven't had a chance to measure the space at the bumpstops yet, but what should it be when I measure it?
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Unread 11-28-2011, 10:02 AM   #5
TheBoogieman
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Those springs do sag.I had the RC 3.25" lift and swapped in their 4" springs up front.The 4" springs are much better.On my TJ with the 2.5" lift,no added weight and 31's,I had 6" tire/fender clearance front and 7.5" rear.A heavier LJ would have less.
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Unread 11-28-2011, 10:25 AM   #6
j_niko
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Stock with 31 inch tires:



RC 2.5 lift with same tires:



Coils are kind of light gray in color
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Unread 11-28-2011, 10:46 AM   #7
LJ-ROD
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Quote:
Originally Posted by TheBoogieman View Post
Those springs do sag.I had the RC 3.25" lift and swapped in their 4" springs up front.The 4" springs are much better.On my TJ with the 2.5" lift,no added weight and 31's,I had 6" tire/fender clearance front and 7.5" rear.A heavier LJ would have less.
Alright, so what kind of clearance did you have after swapping the springs?
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Unread 11-28-2011, 11:22 AM   #8
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The RC springs were painted black in the early production kits. They are Grey/silver now.
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Unread 11-28-2011, 06:42 PM   #9
RubiconRazorbac
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Quote:
Originally Posted by LJ-ROD

How much extra weight did you have on it? All I have now is a bumper and rockers... surely it wouldn't sag with just that?

Haven't had a chance to measure the space at the bumpstops yet, but what should it be when I measure it?
Maybe you missed the part where I said BONE STOCK.

Once I started adding any weight the lift height went to about .75". No kidding, no exaggeration. I switched to 4" Currie springs as soon as I could.
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Quote:
Originally Posted by Imped View Post
Your shaft isn't long enough to handle that kind of droop...
My build thread: http://www.jeepforum.com/forum/f9/ru...thread-792423/
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lift kit , lift question , rc 2.5 , rough country lift

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