Have a Teraflex 2" front, 1" rear lift on our 2017 JKU. Should I install extended bump stops on the front?? Looking at the "slip on" units from Teraflex (#1953800). Thx
Renegade4006
Bumpstop extensions are needed when you add shocks that are longer compressed than the stock shocks are, or if you add shock extensions to the stock shocks.
If you only add spring spacers to the springs, say 2" in front and 1" in back, no bumpstop extensions are required. But if you replace the stock shocks with shocks that are 2" longer compressed up front and 1" longer compressed in back to match the spring spacers you would then need 2" bumpstop extensions up front and 1" bumpstop extensions in back. Of if you simply added 2" shock extensions front and rear to the stock shocks you would need 2" bumpstop extensions front and rear.
But if all you did is add spring spacers to raise the ride height no bumpstop extensions are required. As a side note, adding spring spacers like that is usually not considered a lift, as a lift includes more than just spring spacers to raise ride height.
Also, in addition to having longer shocks, bumpstop extensions can be added to add clearance for larger tires. Adding spring spacers doesn't actually add clearance for larger tires, but adding bumpstop extensions will. But normally adding bumpstop extensions is only done as part of a lift, part of a larger package designed to work together. Spring spacers, longer shocks or shock extensions, bumpstop extensions, and other parts like rear trackbar brackets, are all part of a proper lift and will add clearance. Just adding spring spacers to raise and / or level out the ride height of your Jeep is fine but it isn't really a lift.
If you only add spring spacers to the springs, say 2" in front and 1" in back, no bumpstop extensions are required. But if you replace the stock shocks with shocks that are 2" longer compressed up front and 1" longer compressed in back to match the spring spacers you would then need 2" bumpstop extensions up front and 1" bumpstop extensions in back. Of if you simply added 2" shock extensions front and rear to the stock shocks you would need 2" bumpstop extensions front and rear.
But if all you did is add spring spacers to raise the ride height no bumpstop extensions are required. As a side note, adding spring spacers like that is usually not considered a lift, as a lift includes more than just spring spacers to raise ride height.
Also, in addition to having longer shocks, bumpstop extensions can be added to add clearance for larger tires. Adding spring spacers doesn't actually add clearance for larger tires, but adding bumpstop extensions will. But normally adding bumpstop extensions is only done as part of a lift, part of a larger package designed to work together. Spring spacers, longer shocks or shock extensions, bumpstop extensions, and other parts like rear trackbar brackets, are all part of a proper lift and will add clearance. Just adding spring spacers to raise and / or level out the ride height of your Jeep is fine but it isn't really a lift.
It's not about height per se. It's a combination of things. You'll destroy you flares for example on aftermarket wheels/35's if you have factory bumstops with a 2/1 spring spacers. So you do them for tire clearance and/or to protect your shocks from bottoming out when your shocks are aftermarket and longer than stock, and /or protect the springs from binding, and/or protect other parts from binding.. As a general rule you bump for lift gained but you can measure what you need to optimize your bumpstops. I started with 2/1 spacers and bumped 2/1 as well to run 35's, now I have a 3/2.75 lift and run 2/2 bumpstops because of my shocks.
Have fun.
Have fun.
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