Overview
The Rubicon Express RE7123T is a 3.5-inch Super-Flex suspension lift kit with twin tube shocks for the 2007–2018 Jeep Wrangler JK. It fits both the 2-door trims and the Unlimited 4-door trims, and the tire size is 35 inches.
The Super-Flex system is a short arm design that keeps the factory mounting locations. The kit includes adjustable upper control arms, a fixed lower control arm and Super-Flex spherical ball joints.
The lift height range is 0 to 3.5 inches. The title names twin tube shocks, and the specifications list shocks as included, so the damping comes with the kit.
Key features
- 3.5-inch Super-Flex suspension lift
- Twin tube shocks, included
- Adjustable upper control arms and a fixed lower control arm
- Serviceable Super-Flex spherical ball joints
- Replacement lift springs, extended bump stops and longer brake lines
Super-Flex alignment checks
A Super-Flex conversion changes control arm geometry, so the alignment should be set with the truck at its final ride height and loaded as it normally runs. Caster, camber and toe all shift when the arms are changed, and the pinion angle affects the driveshaft and the wear on the U-joints. Taking the time to check each measurement now prevents tire wear and steering problems later.
Adjustable upper control arms let the setup be fine tuned, but they also need inspection because their joints carry the load of steering and braking. Look for play in the joints, cracked welds at the brackets and worn rubber bushings in the mounts. Replacing worn bushings while the parts are off the truck is a sensible step.
- Check toe after the first highway drive
- Inspect U-joints for play
- Look for cracks at arm brackets
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | R/ERE7123T (RE7123T) |
| Kit type | Super-Flex short arm suspension lift kit |
| Lift height range | 0 to 3.5 inches |
| Tire size | 35 inches |
| Shock type | Twin tube, per the title |
| Rear lift method | Coil springs |
| Shocks included | Yes |
| Fitment type | Direct fit |
Vehicle fitment
It fits the 2007–2018 Jeep Wrangler (JK) 2-door trims, including the 70th Anniversary, 75th Anniversary, Rubicon, Sahara, Sport, Sport S and X models, and the Unlimited 4-door trims in the same names.
The JL generation and earlier Wrangler years outside 2007–2018 are not on this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
A Super-Flex conversion changes the control arm geometry, so the pinion angle and the alignment should be checked once the kit is in and the truck sits at its new height.
What’s included
The kit includes twin tube shocks, adjustable upper control arms, a fixed lower control arm, Super-Flex spherical ball joints, replacement lift springs, extended bump stops and longer brake lines.
