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Better Rear Geometry for Lifted JK and JKU Wranglers
The RK06063B is Rock Krawler's Adventure Series rear lower control arm, built to correct the rear suspension bind that shows up once a Jeep Wrangler JK or JKU is lifted. Formed from solid alloy steel and bent for extra ground clearance, the RK06063B is a straightforward bolt-on upgrade for owners who want stronger rear arms without giving up daily drivability.
Key Features
- Made from solid alloy steel for long term strength on and off the trail
- RK06063B arm is bent to improve rear axle ground clearance
- Approximate installed length of 20.313 inches matches factory geometry
- Durable black powder coat finish resists rust and abrasion
- Direct bolt-on replacement using factory mounting points
- Works well alongside Rock Krawler rear upper control arms for full rear geometry correction
- Backed by Rock Krawler's Abuse Proof Lifetime Warranty
Fitment
| Year Range | Make | Model |
|---|---|---|
| 2007-2018 | Jeep | Wrangler JK |
| 2007-2018 | Jeep | Wrangler JKU |
Specifications
| Detail | Value |
|---|---|
| Manufacturer Part Number | RK06063B |
| Brand | Rock Krawler |
| Position | Rear Lower |
| Material | Solid alloy steel |
| Approximate Length | 20.313 inches |
| Finish | Black powder coat |
| Warranty | Abuse Proof Lifetime Warranty on hard parts |
What's Included
- 2 x RK06063B Adventure Series Rear Lower Control Arms
- Required mounting hardware for OEM-location installation
About Rock Krawler
Rock Krawler Suspension has been engineering off-road suspension systems for Jeep owners for decades, earning a reputation for hard parts that survive real trail abuse. The RK06063B carries that same build quality into a simple, direct bolt-on upgrade for JK and JKU owners.
Related Parts on Our Site
- Rock Krawler 07-18 Jeep Wrangler JK/JKU JK Adventure Series Front Lower Control Arms
- Rock Krawler 07-18 Jeep Wrangler JK/JKU JK Adventure Series Rear Upper Control Arms
- Rock Krawler 07-18 Jeep Wrangler JK/JKU 1.5-3.5in Lift Rear Adjustable Track Bar
FAQ
What is the RK06063B?The RK06063B is a Rock Krawler Adventure Series rear lower control arm for 2007 to 2018 Jeep Wrangler JK and JKU models. It is made from solid alloy steel, bent for extra rear ground clearance, and finished in durable black powder coat.
Does the RK06063B fit both 2 door JK and 4 door JKU Wranglers?Yes, the RK06063B fits both the 2 door JK and 4 door JKU Wrangler from 2007 through 2018.
Is the RK06063B adjustable in length?No, the RK06063B is a fixed length arm designed to match factory rear lower control arm geometry at approximately 20.313 inches.
Do I need rear upper control arms with the RK06063B?Rock Krawler recommends pairing the RK06063B with rear upper control arms to properly correct pinion angle and rear geometry after a lift installation.
Does the RK06063B require drilling to install?No, the RK06063B is a direct bolt-on replacement that uses the factory rear lower control arm mounting points.
What material is the RK06063B made from?The RK06063B is manufactured from solid alloy steel bar stock and finished with a black powder coat for corrosion resistance.
How many arms come in a set of RK06063B control arms?The RK06063B is sold as a pair, giving you two rear lower control arms to replace both sides of the rear suspension.
What warranty applies to the RK06063B control arms?The RK06063B is covered under Rock Krawler's Abuse Proof Lifetime Warranty, which replaces the arms if they are bent, broken, or damaged in a way that affects function when properly installed.
Will the RK06063B work with a lift kit on my JK?Yes, the RK06063B is commonly used as part of a lift kit upgrade and its bent design provides the ground clearance needed for lifted JK and JKU Wranglers.
Install Instructions
- Raise and safely support the rear of the Jeep Wrangler on a lift or jack stands.
- Remove the rear wheels and support the rear axle to relieve suspension load.
- Remove the factory rear lower control arm bolts at the frame and axle mounting points, saving the OEM hardware for reuse.
- Remove the factory rear lower control arms and discard.
- Position the RK06063B arm with the bend oriented upward for correct ground clearance.
- Install the RK06063B arm using the OEM hardware at both the frame and axle mounting points, torquing to factory specification.
- Repeat the process for the opposite side.
- Lower the Jeep, cycle the suspension, and check for clearance issues before performing a rear alignment check.
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