shock length for 1.75" coil spacer lift 2010 JKU - JeepForum.com
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post #1 of 5 Old 10-11-2019, 07:06 PM Thread Starter
1sportsdoc
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shock length for 1.75" coil spacer lift 2010 JKU

Help! Can't seem to get a consistent answer on what shocks to use. 1.8" down travel seems too little, but they're telling me it's enough. Stock down travel is about 3.75" frt and rr.

Thoughts? Thank you


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post #2 of 5 Old 10-13-2019, 10:00 AM
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if you go with say a shock that is 10" of travel(stock is 8"). then add 2" bump stops. so the shock will not become the bump. should help those numbers. or you can add extension to the shocks and 2" bumps, though that wont add travel it will get back what you have lost in down.
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post #3 of 5 Old 10-13-2019, 03:17 PM Thread Starter
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Originally Posted by 222Doc View Post
if you go with say a shock that is 10" of travel(stock is 8"). then add 2" bump stops. so the shock will not become the bump. should help those numbers. or you can add extension to the shocks and 2" bumps, though that wont add travel it will get back what you have lost in down.
Thanks 222doc. Appreciate your input. Extended bump stops have been installed. One retailer told me if I go with a shock that has much more (front) down travel than the 1.8" ... I could pop a coil. Factory Rubicon shock has 3.75" of down travel (close to the same for up travel). The bilstein 5100 recommended has 4.6" of down travel (front).

Currently, I'm using the recommended Bilstein 5100. They are a bit stiff for me so I wanted to consider the Rancho 9000XL adjustable. This is when all the confusion started.
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post #4 of 5 Old 10-13-2019, 04:30 PM
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rather hard to loose a front coil. if you added the bumps to the perch. Now the rear can be an issue if it ever goes to FULL droop. they do make or one can make ones own rear spring retainers to the axle. if you added 1.75 to the spring with a spacer. then added say 10" shocks. that is .25 longer then stock springs would be used normally. bet it works. now dont get 11" or 12" shocks yes that will drop the rear out I have seen it on the trails many a time. Never a front as i said it kind trapped in there. when you made that inner perch say 2" or more inches taller with the added bump.
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post #5 of 5 Old 10-14-2019, 02:19 PM Thread Starter
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Originally Posted by 222Doc View Post
rather hard to loose a front coil. if you added the bumps to the perch. Now the rear can be an issue if it ever goes to FULL droop. they do make or one can make ones own rear spring retainers to the axle. if you added 1.75 to the spring with a spacer. then added say 10" shocks. that is .25 longer then stock springs would be used normally. bet it works. now dont get 11" or 12" shocks yes that will drop the rear out I have seen it on the trails many a time. Never a front as i said it kind trapped in there. when you made that inner perch say 2" or more inches taller with the added bump.
The Bilsteins are 9.6" travel front at a ride height of 20" (distance from end to end of shock). The rear travel is 10.9" at ride height of 21". Front down travel is 4.6", rear is 5.3". Will lose some compression due to bump stops which is fine.

Compare the above to 1.8" down travel front and 2.1" rear.

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