Overview
The Rubicon Express RE1390 is a pair of rear bump stop extensions for the Jeep Grand Cherokee (ZJ), 1993 to 1998. They lower the stock ZJ rear bump stops by 2 inches, which allows the use of larger tires.
The extensions are a direct fit and come with self-tapping mounting bolts. They are sold as a pair.
Key features
- Rear position
- Lowers the factory rear bump stop by 2 inches
- Allows the use of larger tires
- Self-tapping mounting bolts included
- Sold as a pair
Before you buy
A bump stop limits how far the axle can travel upward before the suspension bottoms out. Moving the stop down by 2 inches means the rear end reaches that limit sooner, so the suspension may feel firmer near the end of its travel. Most drivers notice this most on rough terrain or when the rear is loaded.
Larger tires add rotating mass and change the geometry of the rear suspension, so it helps to review the whole setup before fitting extensions. Check shock length, brake line slack and fuel tank clearance, since a lower stop changes how far the axle can move before contact.
After installation, inspect the stops and their mounting points at regular service intervals. Self-tapping bolts can loosen over time, so re-check them after the first few trail runs.
- Check brake line slack at full droop and full compression
- Confirm shock travel is adequate for the new stop position
- Re-check mounting bolts after the first few trail runs
Specifications
| Brand | Rubicon Express |
|---|---|
| Part number | RE1390 |
| UPC | 614901438086 |
| Position | Rear |
| Lowering | 2 inches |
| Mounting bolts | Self-tapping, included |
| Sold as | Pair |
| Fitment | Direct fit |
Vehicle fitment
The extensions are made for the Jeep Grand Cherokee (ZJ) from 1993 to 1998 and fit the stock rear bump stops of that model.
Confirm your vehicle’s year, model and trim before ordering, and check that the rear bump stops on your vehicle are the stock ZJ type.
