- 5 stars: 1 (50%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 1 (50%)
- 1 star: 0 (0%)
K
Kasandra Kovacek The bag itself is good, but the straps for attaching to the frame are very short!
P
Phil Becker Ok
Safeguard your electric bike's motor controller and sensitive wiring with the Waterproof Electric Bicycle Controller Bag. Specifically engineered for e-bike conversion kit builds, custom electric bicycles, and commuter scooters, this rugged storage case shields your electronics from rain, road grit, dust, and vibration while keeping your frame wiring clean and organized.
Crafted from high-density water-resistant nylon fabric, this case features a dedicated rubberized cable pass-through port, dual smooth-gliding zippers, reflective safety piping, and heavy-duty adjustable mounting straps. Available in two versatile sizes—Size S (19 × 10 × 7 cm) for compact 250W–500W controllers and Size L (28 × 12.5 × 7 cm) for high-power 750W–2000W controllers or extra tool storage.



Measure your motor controller's outer dimensions (including wire exit clearance) before selecting your bag:

| Parameter | Specification |
|---|---|
| Product Type | E-Bike Controller Storage Bag / Frame Case |
| Material | Heavy-Duty Water-Resistant Ballistic Nylon |
| Small Size Dimensions (S) | 19 cm × 10 cm × 7 cm (7.48" × 3.94" × 2.76") |
| Large Size Dimensions (L) | 28 cm × 12.5 cm × 7 cm (11.02" × 4.92" × 2.76") |
| Color & Trim | Matte Black with Red Contrast Piping |
| Safety Feature | Integrated Silver Reflective Night Safety Strip |
| Mounting Method | Adjustable Hook-and-Loop Frame Fastening Straps |
| Closure | Reinforced Dual Zipper with Cord Pulls |
| Cable Routing | Weather-Sealed Cross-Cut Rubber Exit Port |
| Application | Electric Bicycles, Mountain Bikes, E-Scooters, Trikes |
Q: How do I know which size (S or L) will fit my controller?
A: Measure your controller length, width, and height. Remember to allow about 2 to 3 cm of extra length for cable bends at the end. For controllers up to 15 cm long (typically 250W–500W / 6–9 MOSFET), choose Size S. For controllers longer than 15 cm (typically 750W–2000W / 12–15 MOSFET), choose Size L.
Q: Is this bag completely submersible or waterproof?
A: It is constructed from water-repellent nylon designed to protect against rain, splashing, and road spray during wet rides. It is not designed to be submerged underwater.
Q: Where can I mount this bag on my bicycle?
A: Thanks to adjustable hook-and-loop straps, it can be mounted on your top tube, down tube, seat tube, or underneath a rear cargo rack depending on your frame geometry.
Q: Will my controller overheat inside this bag?
A: For standard riding and commuting, heat dissipation is sufficient. If you are operating high-powered 1500W–2000W systems under continuous maximum throttle, ensure your controller has adequate breathing room or consider a metal controller bracket.
Q: What warranty and shipping terms apply?
A: All orders from E Smart Way include storewide free shipping, tracking numbers upon dispatch, and quality customer support.
Free Worldwide Shipping: Every order is carefully inspected and packaged prior to shipping. Tracking numbers are uploaded promptly after dispatch.
Import Duties & Taxes: Depending on local destination customs rules, international shipments may occasionally be subject to local VAT, customs clearance fees, or import duties levied by destination authorities. These fees remain the recipient's responsibility under standard international trade terms.
Delivery Contact: Please verify your phone number and shipping address during checkout so carriers can notify you promptly upon arrival.