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Matt C.
What is part number for the 1/2 rear spacer . Discussed in one of the comments.
Thank you
For the Quadratec ST2 2.5" Suspension Lift by Teraflex on your 18-25 Jeep Wrangler JL, the part number for the 1/2" rear spacer is 1155120.
Jerome M.
Can you upgrade Front Lower Control Arms to adjustable? Can you remove quick disconnects?
Yes, you can absolutely upgrade the control arms to adjustable units. The Quadratec ST2 2.5" Suspension Lift is a collaborative kit built by Teraflex, meaning it is fully compatible with the standard Teraflex Alpine and Alpine IR component ecosystems.
1. Upgrading to Adjustable Front Lower Control Arms
While the ST2 kit comes with fixed-length "Sport" Lower Control Arms—which are preset to correct caster for a 2.5" lift—you can replace them with adjustable arms. Adjustable arms allow you to fine-tune your caster angle more precisely, which can significantly improve "flighty" steering or return-to-center feel.
TeraFlex Alpine IR Front Lower Adjustable Control Arms: These are the top-tier upgrade. They feature IR (Independent Rotation) bushings that provide unrestricted flex without the maintenance required by traditional rod ends.
TeraFlex Alpine Front Lower Adjustable Control Arms: A slightly more affordable adjustable option that uses high-quality factory-style rubber bushings for excellent noise and vibration damping.
2. Removing/Replacing Quick Disconnects
If you do not plan to disconnect your sway bar or if you have a Rubicon with an electronic sway bar disconnect, you can swap these for fixed (non-disconnect) links.
Front Links: You would simply replace the disconnect hardware with a standard Teraflex Front Sway Bar Link.
Rear Links: The kit already includes standard Teraflex Rear Sway Bar Links, so no change is needed there unless you want to upgrade to a swivel-stud version for better clearance.
1. Upgrading to Adjustable Front Lower Control Arms
While the ST2 kit comes with fixed-length "Sport" Lower Control Arms—which are preset to correct caster for a 2.5" lift—you can replace them with adjustable arms. Adjustable arms allow you to fine-tune your caster angle more precisely, which can significantly improve "flighty" steering or return-to-center feel.
TeraFlex Alpine IR Front Lower Adjustable Control Arms: These are the top-tier upgrade. They feature IR (Independent Rotation) bushings that provide unrestricted flex without the maintenance required by traditional rod ends.
TeraFlex Alpine Front Lower Adjustable Control Arms: A slightly more affordable adjustable option that uses high-quality factory-style rubber bushings for excellent noise and vibration damping.
2. Removing/Replacing Quick Disconnects
If you do not plan to disconnect your sway bar or if you have a Rubicon with an electronic sway bar disconnect, you can swap these for fixed (non-disconnect) links.
Front Links: You would simply replace the disconnect hardware with a standard Teraflex Front Sway Bar Link.
Rear Links: The kit already includes standard Teraflex Rear Sway Bar Links, so no change is needed there unless you want to upgrade to a swivel-stud version for better clearance.
Jeffrey O.
Do I need the geometry correcting brackets for this?
Can I install this wirh the .5 inch spring lift?
Thank you.
For the Quadratec ST2 2.5" Suspension Lift by Teraflex, the short answer is that geometry correction brackets are optional but highly recommended, and you can technically use a 0.5-inch spacer, though it may affect your ride quality.
Thomas S.
Does the kit come with quick front sway bar disconnects ?
No, the Quadratec ST2 2.5" Suspension Lift by Teraflex does not include front sway bar quick disconnects.
The "ST" in the ST2 name stands for "Street & Trail," and this kit is specifically designed to bridge the gap between daily driving comfort and off-road capability.
The "ST" in the ST2 name stands for "Street & Trail," and this kit is specifically designed to bridge the gap between daily driving comfort and off-road capability.
Thomas S.
Does this kit come with the Teraflex adjustable Track Bar as shown in the pictures?
Yes, it does.
Clint S.
Will 285/70/17 tires with 5.2 inch backspacing on the wheels fit with this lift? Specifically looking at a tire and wheel package from Quadratec, and most all wheels are at 5.2 inches of backspacing.
Yes, the 285/70/17 tires paired with wheels featuring 5.2-inch backspacing will fit your Jeep Wrangler JL Unlimited with the Quadratec ST2 2.5" Suspension Lift.
While Teraflex technically recommends 4.75 inches of backspacing or less for maximum clearance on the Sport ST2 series, the 285/70/17 is a 33-inch tire that is relatively narrow (approx. 11.2 inches). Because of this smaller width compared to a 12.50-wide tire, the 5.2-inch backspacing typically found on Quadratec-brand wheels provides enough clearance to avoid rubbing on the frame or sway bar links under normal driving conditions.
While Teraflex technically recommends 4.75 inches of backspacing or less for maximum clearance on the Sport ST2 series, the 285/70/17 is a 33-inch tire that is relatively narrow (approx. 11.2 inches). Because of this smaller width compared to a 12.50-wide tire, the 5.2-inch backspacing typically found on Quadratec-brand wheels provides enough clearance to avoid rubbing on the frame or sway bar links under normal driving conditions.
Brian J.
Does this have instructions and is it possible to see them before purchasing?
Yes, please see the pdf : https://www.quadratec.com/sites/default/files/installation_instructions/Teraflex-2.5-Inch-Base-Lift-Kit-Jeep-Wrangler-Unlimited-JL-Install-Instructions.pdf
Mike H.
Will this kit fit a 2023 JL Wrangler Unlimited Sahara with the 2.0 engine?
yes, this lift kit will fit!
Danny T.
does ur new quadratec lft allow 37 tires on stock mopar xr wheels without any rub
No. For 37's you'll want to run a 3.5" lift or higher. While a 3.5-inch lift can technically allow you to run 37-inch tires on your JL Unlimited, a 4-inch lift is generally recommended for better overall clearance and less potential for rubbing. Remember that addressing wheel backspacing, bump stops, steering, drivelines, brake lines, all 8 control arms, brakes, and gearing and re-programming are equally important aspects of this upgrade.
Max D.
Will this fit 2021 rubicon unlimited? I see wrangler unlimited but not Rubicon unlimited.
Yes, it will work with a Jeep Wrangler Rubicon trim package.