Long Arm vs Short Arm?
Whats the difference between Long Arm and Short Arm other than price?
I have tried researching this and there is very little about this question in this forum from what I have seen and in other forums it seems to be a mixed message. Looking at the Full Traction kits and while there is quite a price difference from the 3" basic kit ($1200) to the Long Arm Kit ($2800) I have seen the Long Arm in action and it looked like it rode well and performed well in the rough stuff. I also know it can be upgraded at a later time to the long arm kit if you were to start out with the basic kit. Ultimately I just want to know which is best or what I even need. My JKU is my daily driver but so far it has seen a lot more trail action than I thought that it would leading me to want to know a little more about a lift and tires. I will not be mudding it but at the same time not rock crawling more than likely. Just solid trail riding with the need to get over obstacles better. |
Longer control arms allow your axle to articulate down further then stock or even mid arms would. So what happens is allow to drop off one or both tires further the you normally would, as long as the longer control arm isn't hit a rock that is.
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If you can afford it go with the long arm kit. It will give you better ability offroad and a smooth on road ride. With what youre saying though, youd be fine with a short arm kit. Long arms arent really needed until 4 inches of lift and higher, but they never hurt.
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Better geometry for those higher lifts too. The further back the arm is mounted the straighter the axle path is. I haven't tested any back to back but I would suspect better road manners.
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The real difference is smoothness and added articulation. Think about the length of the arm and where they connect to the frame. Although they may provide the same lift height, the long arm is at a much flatter angle. Under compression, or impact, that arm transmits less energy to the frame and more into the shock and spring.
On the articualtion side, the benefits of the 2 designs really depend on your use. Some guys want a lot of articulation and others want more stability. Up travel is usually very similar in both systems as the body and frame are frequently the limiting factor. Down travel is where you'll see the biggest differences. Added down travel can actually require you to limit your up travel due to axle angle under extreme droop on one side. For the average, even pretty hardcore guy, a 14" shock usually provides plenty of suspension. The downside to long arms is the arms themselves. In a rocky environment they can really hurt your ground clearance. Some kits also drop the belly pan or replace it with a lower version. A flat belly pan tucked up tight to the frame is the very best option. There isn't a perfect system as every system has its drawbacks. Me? I'm a bit partial to mid length arm kits. |
Originally Posted by EpicCosmo
(Post 2456721)
Whats the difference between Long Arm and Short Arm other than price?
I have tried researching this and there is very little about this question in this forum from what I have seen and in other forums it seems to be a mixed message. Looking at the Full Traction kits and while there is quite a price difference from the 3" basic kit ($1200) to the Long Arm Kit ($2800) I have seen the Long Arm in action and it looked like it rode well and performed well in the rough stuff. I also know it can be upgraded at a later time to the long arm kit if you were to start out with the basic kit. Ultimately I just want to know which is best or what I even need. My JKU is my daily driver but so far it has seen a lot more trail action than I thought that it would leading me to want to know a little more about a lift and tires. I will not be mudding it but at the same time not rock crawling more than likely. Just solid trail riding with the need to get over obstacles better. |
Originally Posted by ink42o
(Post 2456746)
Longer control arms allow your axle to articulate down further then stock or even mid arms would. So what happens is allow to drop off one or both tires further the you normally would, as long as the longer control arm isn't hit a rock that is.
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Originally Posted by Dynatrac
(Post 2457041)
The real difference is smoothness and added articulation. Think about the length of the arm and where they connect to the frame. Although they may provide the same lift height, the long arm is at a much flatter angle. Under compression, or impact, that arm transmits less energy to the frame and more into the shock and spring.
On the articualtion side, the benefits of the 2 designs really depend on your use. Some guys want a lot of articulation and others want more stability. Up travel is usually very similar in both systems as the body and frame are frequently the limiting factor. Down travel is where you'll see the biggest differences. Added down travel can actually require you to limit your up travel due to axle angle under extreme droop on one side. For the average, even pretty hardcore guy, a 14" shock usually provides plenty of suspension. The downside to long arms is the arms themselves. In a rocky environment they can really hurt your ground clearance. Some kits also drop the belly pan or replace it with a lower version. A flat belly pan tucked up tight to the frame is the very best option. There isn't a perfect system as every system has its drawbacks. Me? I'm a bit partial to mid length arm kits. |
Originally Posted by TeraFlex
(Post 2457097)
Unless your running less bumpstop/longer shocks, you will have the same travel as a short arm kit. TeraFlex uses the same coils/shocks combination with our short/long arm kits. The higher you lift a JK, the harsher the ride and the more the ride quality suffers. Long arm kits help to correct this issue by improving the angles of the control arms. With the arms closer to parallel the smoother the ride and the handling is improved.
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Originally Posted by EpicCosmo
(Post 2457117)
So what I have gathered from this the most is that if I only plan on going with 3-4" lift and 35's then a short arm kit is fine?
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