EB5 Roamer ST Ebike: How to Install a Rear Rack

By JasionBike | Published: 2026-10-26

Category: How-to Guides

Learn how to install a rear rack on your Jasion EB5 Roamer ST ebike. Follow these step-by-step instructions for a secure and stable cargo setup.

Quick answer

To install a rear rack on your EB5 Roamer ST, attach the rack arms to the seatpost and frame mounting points, then secure the platform and test for stability.

Why a rear rack makes sense for the EB5 Roamer ST

The EB5 Roamer ST comes with a 1100W motor and a long 62-mile range, making it a capable commuter or utility bike. Adding a rear rack lets you carry panniers, a basket, or a cargo bag without affecting the bike's balance. The frame includes threaded inserts near the rear dropout and seat stays, which are standard locations for rack mounting.

One trade-off: the EB5 Roamer ST's battery is integrated into the downtube, so you cannot mount a rack that clamps to the seat tube. Stick to a standard two-arm or four-arm rack that attaches to the seat stays and the dropouts.

Step-by-step installation guide

1. Gather tools and check mounting points: You will need a 4 mm and 5 mm hex wrench, and possibly a Phillips screwdriver. Inspect the rear dropouts and seat stays for threaded holes. The EB5 Roamer ST has two pairs of eyelets: one near the axle and one higher on the seat stay. If you see no threaded holes, your frame may not support a rack. Consider a seatpost-mounted rack instead.
2. Attach the lower rack arms to the dropouts: Position the rack so the lower arms align with the dropout eyelets. Insert the bolts and tighten them with a 5 mm hex wrench. Do not overtighten — the torque should be firm but not stripping the threads. Use thread-locking compound on these bolts to prevent loosening from vibration.
3. Secure the upper arms to the seat stays: Slide the upper rack arms over the seat stay eyelets. Use the provided bolts and washers. Tighten evenly on both sides to keep the rack level. A common mistake is tightening one side fully before the other, which twists the rack.
4. Install the platform and adjust alignment: Place the rack platform on the arms and fasten it with the included screws. Check that the platform is parallel to the ground and centered between the wheels. Adjust the arm lengths if your rack has slotted holes. If the platform tilts forward or backward, loosen the upper arm bolts and reposition before retightening.
5. Test stability and load capacity: Push down on the rack with moderate force — it should not wobble or shift. Then attach a light load (5-10 lb) and ride slowly around a safe area. Listen for rattles and check bolt tightness afterward. Never exceed the rack's stated weight limit. Overloading can damage the frame or cause handling issues.

Product fact

EB5 Roamer ST*2: The EB5 Roamer ST is equipped with a front suspension system and four electronic control systems. The front suspension means you must avoid attaching the rack to the fork; use the frame's rear mounting points instead.
EB5 Roamer ST*2