Rock Slide Engineering Big Sky Full Rear Bumper | Aluminum | No Tire Carrier | 2018-2026 Jeep Wrangler JL | SKU RB-F-300-JL

The Rock Slide Engineering Big Sky Full Rear Bumper (SKU RB-F-300-JL) is the aluminum rear bumper for the 2018–2026 Jeep Wrangler JL. Part of the Quest Series aluminum lineup — same construction family as the FB-F-300-JL and FB-S-300-JL front bumpers. Full rear coverage with 3-inch light pockets for flush mount aftermarket rear lights, factory receiver hitch retained, license plate mount with LED light, and integrated sensor holes for equipped vehicles. No tire carrier integration. Estimated 2-hour install. 56 lbs. Sold as each.

Component Specifications

What Is and Is NOT Included

Sensor-Equipped JL — What to Know Before Installing

JL Wranglers equipped with rear park distance sensors may require replacement sensor mounting bezels when switching from the factory bumper to an aftermarket bumper. The RB-F-300-JL includes integrated sensor holes, but bezel replacement may be required depending on your specific configuration. Confirm with Rock Slide Engineering before ordering if your JL is sensor-equipped.

Quest Series Rear Bumper vs. Rigid Series

The RB-F-300-JL is designed to pair with the FB-F-300-JL or FB-S-300-JL aluminum front bumpers for a matched aluminum system. If running a steel front bumper, evaluate the Rigid Series steel rear bumper for matched construction.

Verified Fitment — 2018–2026 Jeep Wrangler JL

Critical Compatibility

Common Questions

Does this bumper retain the factory receiver hitch?
Yes. The factory receiver hitch is retained and accessible through the bumper. Factory tow plug bracket included.

My JL has rear park distance sensors. Do I need anything extra?
The RB-F-300-JL includes integrated sensor holes, but moving from a factory plastic bumper to an aftermarket aluminum bumper may require replacement sensor mounting bezels depending on your specific JL configuration. Confirm with Rock Slide Engineering before ordering to identify whether Mopar replacement bezels are needed for your specific sensor setup.

Does this include a tire carrier?
No. The RB-F-300-JL is a rear bumper only with no tire carrier integration. If a spare tire carrier is required, evaluate Rock Slide Engineering's Rigid Series or other rear bumper options with tire carrier capability.

Does this fit the Gladiator JT?
This is not confirmed in the verified fitment data. The product is marketed as fitting both JL and JT, but the fitment table in source data lists JL trims only. Text (469) 407-7538 to confirm JT fitment before ordering.

The Obsidian Take

The RB-F-300-JL is for the JL owner who is building a matched aluminum bumper system — pairing this rear bumper with the FB-F-300-JL or FB-S-300-JL aluminum front bumper for a consistent weight profile and finish. Fifty-six pounds of aluminum rear protection with factory hitch retention, sensor hole integration, LED license plate, and 3-inch light pockets.

Two things to confirm before ordering. First — if your JL has rear sensors, verify whether Mopar bezel replacements are needed. Second — if you are building a Gladiator JT, confirm JT fitment directly with Rock Slide Engineering before purchasing.

⚠️ California Proposition 65 Warning: This product may expose you to chemicals known to the State of California to cause cancer or reproductive harm. For more information visit P65Warnings.ca.gov.

Non-Returnable Notice: Structural and body protection products that have been installed or modified are non-returnable. Verify fitment, model year, and trim before ordering.

Manufacturer Data Disclaimer: Specifications and fitment data are sourced from Rock Slide Engineering manufacturer documentation. Fitment extended to 2026 consistent with JL production continuation — JT fitment unconfirmed in source data, verify before ordering. Obsidian Forged Auto Supply is an authorized Rock Slide Engineering dealer. Manufacturer specifications are subject to change without notice.