Overview
The Rubicon Express RE7123M is a 3.5-inch Super-Flex short arm suspension lift kit with monotube shocks for the 2007–2018 Jeep Wrangler JK 2-door. It fits the 70th Anniversary, 75th Anniversary, Rubicon, Sahara, Sport, Sport S and X trims, and it pairs with a 35-inch tire size.
The short arm design keeps the factory mounting locations. The kit adds new adjustable upper control arms, a fixed lower control arm and serviceable Super-Flex spherical ball joints in place of the factory arms.
The lift height range is 0 to 3.5 inches. Monotube shocks come with the kit at both ends, so the damping is supplied together with the lift.
Key features
- 3.5-inch Super-Flex short arm lift
- Adjustable upper control arms and a fixed lower control arm
- Serviceable Super-Flex spherical ball joints
- Replacement lift springs and extended bump stops
- Longer front and rear stainless steel brake lines
Choosing a lift height
A short arm lift keeps the stock mounting points, so the change in ride height comes mainly from the new arms and springs rather than from relocating the axle. Before buying any lift of this type, decide how tall the tires and the rest of the build will be. Taller tires need more clearance at the bump stops, and a lift that is higher than the tires can accommodate can cause rubbing at full compression.
Because the control arms are replaced, expect the alignment to be part of the install rather than an optional step. Upper and lower arm angles change the caster and pinion relationship, so a driveline check helps prevent vibration. Once the truck has settled, re-check the ball joints and bolts after the first few trail outings and again after a longer road trip.
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | R/ERE7123M (RE7123M) |
| Kit type | Super-Flex short arm lift kit |
| Lift height range | 0 to 3.5 inches |
| Tire size | 35 inches |
| Front shocks | Monotube |
| Rear shocks | Monotube |
| Rear lift method | Coil springs |
| Shocks included | Yes |
| Fitment type | Direct fit |
Vehicle fitment
It is a direct fit for the 2007–2018 Jeep Wrangler (JK) 2-door in the 70th Anniversary, 75th Anniversary, Rubicon, Sahara, Sport, Sport S and X trims.
The 4-door Unlimited JK models and the JL generation are not on this list. Confirm your vehicle’s year, model and trim before ordering.
Installation notes
Replacing the control arms changes the axle location and the pinion angle, so the driveline and the alignment both need to be set after the install. The bump stops and brake lines included with the kit should be routed as the instructions show.
What’s included
The kit includes adjustable upper control arms, a fixed lower control arm, Super-Flex spherical ball joints, replacement lift springs, extended bump stops and longer front and rear stainless steel brake lines, with monotube shocks at both ends.
