1. Introduction
The NEWBOLER Portable Waterproof Bike Fork Bag (Model BAG204) is designed for cyclists and electric scooter users who require additional storage for their gear. This 7-liter capacity bag features a durable, waterproof construction to protect your belongings from the elements, making it ideal for bikepacking, touring, and daily commutes. It can be securely mounted to the front fork of various bicycles and electric scooters.

2. Product Features
- Rainproof Function: Designed to keep your belongings dry during rainy rides.
- Large Capacity: 7-liter capacity to hold essential items for long rides.
- Waterproof Material: Constructed from 600D Nylon with welded seams and an outer PU coating, and an inner TPU coating for complete waterproofing.
- Durable Construction: Double-layered 840D nylon at the bottom for enhanced strength and wear resistance.
- Versatile Mounting: Can be mounted on various bicycle forks (including those with threads and dampers) and electric scooters. Compatible with Mountain Bikes, Off-Road/Road Bikes, E-Scooters, and Touring Bikes.
- High Load Capacity: Supports a maximum load of 130 kg (286 lbs).
- Easy to Carry & Clean: Simple design for portability and maintenance.



3. Package Contents

- 1x 7L Bike Bag (Model: BAG204)
- 1x Mounting Seat (Bicycle bag mount)
- Mounting Straps (typically 4 zip ties and 2 adjustable straps)
- 1x Allen Key (for installation)
4. Installation
The NEWBOLER Bike Fork Bag system consists of a mounting bracket (cage) and the waterproof bag. Follow these steps for proper installation:
4.1 Installing the Fork Mount (Cage)
- Prepare the Mount: Take the bicycle bag mount and the provided zip ties.
- Position the Mount: Place the mount on the bicycle fork at your desired height. Ensure it does not interfere with wheel rotation or braking mechanisms.
- Secure with Zip Ties: Use the provided zip ties to firmly attach the mount to the fork. Thread the zip ties through the designated slots on the mount and around the fork. Pull them tight to ensure a secure fit.
- Trim Excess: Once all zip ties are tight, trim any excess length for a clean finish.

4.2 Attaching the Waterproof Bag
- Load the Bag: Place your items inside the 7L waterproof bag.
- Seal the Bag: Roll down the top opening of the bag at least 3-4 times to create a waterproof seal. Fasten the buckle at the top.
- Insert into Mount: Place the sealed bag into the installed fork mount.
- Secure with Straps: Use the two adjustable straps. Thread them through the buckles on the mount and around the bag. Pull the straps tight to firmly secure the bag within the mount. Ensure the bag is stable and does not wobble.
Note: The mount can also be screwed onto a fork (if appropriate) or a bottle holder on a bicycle frame using the provided Allen key, offering versatile mounting options.
Video 1: Product demonstration showing installation and use.
5. Operating Instructions
5.1 Loading the Bag
- Open the roll-top closure.
- Place your items inside the bag. Distribute weight evenly for better balance on the bike.
- Do not overfill the bag beyond its 7L capacity to ensure proper sealing.
5.2 Sealing for Waterproofing
- After loading, press out any excess air.
- Roll the top edge of the bag down tightly at least 3-4 times.
- Secure the buckle at the top to maintain the seal. This creates a watertight closure.
5.3 Carrying Capacity
The fork mount is designed to support a maximum load of 130 kg (286 lbs). While the bag itself has a 7L volume, ensure the total weight of the contents does not exceed the safe carrying capacity of your bicycle's fork and the mount system.

6. Maintenance
- Cleaning: Wipe the bag with a damp cloth and mild soap. Do not use harsh chemicals or abrasive cleaners. Rinse thoroughly and allow to air dry completely before storage.
- Storage: Store the bag in a cool, dry place away from direct sunlight when not in use.
- Inspection: Periodically check the straps, buckles, and mounting hardware for any signs of wear or damage. Replace components as needed to ensure secure attachment.
- Waterproof Integrity: Ensure the roll-top closure is clean and free of debris before sealing to maintain its waterproof properties.
7. Troubleshooting
7.1 Bag Not Secure
- Check Straps: Ensure all zip ties and adjustable straps are pulled tight and properly fastened.
- Mount Stability: Verify that the fork mount itself is securely attached to the bicycle fork and does not move. Re-tighten zip ties or screws if necessary.
- Weight Distribution: Ensure the contents of the bag are evenly distributed and not causing imbalance.
7.2 Water Penetration
- Proper Sealing: Confirm that the roll-top closure has been rolled down at least 3-4 times and the buckle is securely fastened.
- Inspect for Damage: Check the bag for any punctures, tears, or compromised seams. While the bag uses high-frequency welded seams, extreme damage can affect waterproofing.
8. Specifications
8.1 Bicycle Fork Mount
| Attribute | Value |
|---|---|
| Name | Bicycle bag mount |
| Material | Engineering grade polymer |
| Size | 21cm x 12cm |
| Weight Capacity | 130 KG |
8.2 Bicycle Bag
| Attribute | Value |
|---|---|
| Model | BAG204 |
| Capacity | 7L |
| Color | Black |
| Material | PVC tarpaulin (Nylon 600D with outer PU coating, inner TPU coating) |
| Size | 53cm x 15cm x 15cm (Note: Dimensions may vary slightly due to manual measurement) |
| Certification | CE |
9. User Tips
- For optimal waterproofing, ensure the roll-top is folded down at least three times and the buckle is securely fastened.
- When mounting, consider the balance of your bike, especially if using two bags on both forks.
- Regularly check the tightness of the mounting straps and zip ties, especially after initial rides, to prevent loosening.
10. Frequently Asked Questions (FAQ)
- Q: What is the brand of this bike bag?
- A: The brand is NEWBOLER.
- Q: Does this item have a specific model number?
- A: Yes, the model number is BAG204.
- Q: Does it have any certifications?
- A: Yes, it has CE certification.
11. Warranty and Support
For warranty claims, technical support, or further inquiries, please contact the seller or manufacturer directly. Keep your proof of purchase for any warranty-related services.
A user manual in PDF format may be available for download. Please refer to the product page or contact customer support for the link.