Hey guys, i have a 2012 2 door with 3 inch BDS springs and bilstein 5100 shocks. I want to add the proper amount of bump stop but am not sure how to measure. Also was looking at the JKS bumpstops what are your opinions? Any and all help is appreciated! Thanks

 

Idealy speaking, you should be setting your bumpstops based off tire size, and choosing the most appropriate shock to fit from there. But since you already have shocks...

There's a few ways you can figure this out, but a "close enough" measurment will be ok.

Measure the distance between your factory bumpstop (yellow or white rubbery thing) and the lower bumpstop pad. You should assume the factory bump stop isolator will compress about 75% of it's free length. We can call this distance A.

Now, measure the amount of exposed shock piston length left at ride height. This is distance B.

The minimum bumpstop length you should run is A-B. If I had to venture a guess, it will be about 2" plus or minus a half inch. Now if you find you are bottoming out somthing else before the shock (tires into sheet metal, drag link on frame if flipped) you should add more bump. If you have excess exposed shaft, you could have gotten away with a longer body shock. Longer body shock = more total travel.

 

Wow that's a great explanation! Thank you