1. Introduction
This manual provides detailed instructions for the installation, operation, and maintenance of your NEWBOLER Bike Saddlebag. Please read this manual thoroughly before using the product to ensure proper function and longevity.
2. Product Information & Specifications
The NEWBOLER Bike Saddlebag is designed for cyclists seeking a durable, waterproof, and convenient storage solution for their mountain or road bikes. It features a hard shell design for protection and reflective elements for enhanced visibility.

Image: Product dimensions and specifications for 1.5L and 2.5L saddlebags.
2.1 General Specifications
| Feature | Description |
|---|---|
| Name | Bicycle Seat Bag |
| Type | Tail Bag |
| Function | Rainproof, Reflective |
| Origin | Mainland China |
2.2 Model-Specific Specifications
| Specification | BAG048 | BAG043 / BAG044 |
|---|---|---|
| Material | EVA composite leather + spandex | PU + EVA + Polyester |
| Mounting | Knob Lock | Velcro Straps |
| Capacity (1.5L) | 21 x 9.5 x 13 cm (152.7g) | Approx. 18 x 9.5 x 13 cm (156g) |
| Capacity (2.5L) | 23 x 10.5 x 14.5 cm (183.5g) | Approx. 23 x 10.5 x 14.5 cm (183.5g) |
3. Setup and Installation
Follow these steps to securely attach your NEWBOLER Bike Saddlebag to your bicycle.
3.1 Installation Steps (General for all models)

Image: Six-step installation guide for the bike saddlebag.
- Positioning: Place the saddlebag directly below your bicycle seat, ensuring it aligns properly with the seat post.
- Front Fastening: For models with Velcro straps (BAG043/BAG044), fix the hook and loop fastener on the front of the bag around the seat tube. For models with a knob lock (BAG048), ensure the front strap is secured.
- Side Straps: Wrap the fixed straps on both sides of the bag around the components under the seat (seat rails).
- Left Buckle (if applicable): If your model has a left buckle thread, stretch it and fix it to the other side for added stability.
- Locking (Knob Lock Models - BAG048): Press the knob to engage the lock mechanism.
- Tightening (Knob Lock Models - BAG048): Turn the knob lock to tighten the line until the bag is firmly secured and does not wobble.
3.2 Video Installation Guide
Video: Demonstration of NEWBOLER Bike Saddlebag features and installation.
4. Operating Instructions
4.1 Knob Lock Operation (Model BAG048)

Image: Instructions for locking and loosening the knob lock mechanism.
- Locking Knob: Press the locking knob down until you hear a 'click' sound, indicating it is locked. You can then rotate the knob to further tighten the strap for a secure fit.
- Loosening Knob: Toggle the locking knob upwards until you hear a 'click' to unlock it. Then, rotate the knob to loosen the strap and remove the bag.
4.2 Waterproof Features

Image: Waterproof demonstration of the saddlebag.
The saddlebag is constructed with waterproof materials (EVA composite leather or PU+EVA+Polyester) and features seamless waterproof zippers to protect your belongings from rain and splashes. Ensure zippers are fully closed for maximum water resistance.
4.3 Storage and Organization

Image: Internal view of the saddlebag showing main compartment and mesh pocket.
The saddlebag features a large zippered main compartment and a built-in mesh pocket for organizing smaller items like tools, keys, or energy gels.
4.4 Reflective Safety Features
The saddlebag incorporates reflective strip designs and logos to enhance your visibility to others, especially during night riding or in low-light conditions.
4.5 Tail Light Compatibility

Image: Saddlebag with an attached tail light (tail light sold separately).
The rear of the saddlebag is designed with a mounting point for a tail light (tail light accessories are not included and must be purchased separately). This feature further enhances safety during night rides.
5. Maintenance
- Cleaning: Wipe the exterior of the saddlebag with a damp cloth and mild soap. Do not use harsh chemicals or abrasive cleaners.
- Drying: Allow the saddlebag to air dry completely before storing or reusing, especially after exposure to rain.
- Storage: Store the saddlebag in a cool, dry place away from direct sunlight when not in use.
- Zippers: Periodically check zippers for smooth operation. If they become stiff, a silicone-based lubricant can be applied sparingly.
6. Troubleshooting
- Bag feels loose: Re-check all straps and the knob lock (if applicable) to ensure they are tightened securely. Adjust the position of the bag for optimal fit.
- Water leakage: Ensure all zippers are fully closed. Check for any visible damage to the fabric or seams.
- Knob lock not engaging: Ensure no debris is obstructing the mechanism. Press firmly until a 'click' is heard.
7. User Tips
- The saddlebag is ideal for carrying essential bike tools, spare inner tubes (can fit two MTB 2.3 tubes), repair kits, and small personal items.
- Users appreciate the rigid and resistant construction, which helps protect contents and prevents the bag from deforming.
- The internal elastic straps are useful for securing small parts and preventing them from rattling during rides.
- The knob lock system (Model BAG048) provides excellent stability, ensuring the bag remains firm even on bumpy roads.
- The high-quality waterproof material and protected zippers offer reliable protection against the elements.
8. Warranty and Support
For any warranty claims, technical support, or further inquiries, please refer to the seller's contact information or the platform where the product was purchased. You may also consult the official user manual PDF for additional details: View User Manual (PDF).