Introduction
This manual provides comprehensive instructions for the NEWBOLER Waterproof Bike Saddle Bag, designed for both mountain (MTB) and road bicycles. It offers a large capacity for carrying essentials during cycling trips, featuring a durable and waterproof construction. Please read this manual carefully before installation and use to ensure proper functionality and longevity of your saddle bag.
Specifications
| Feature | BAG026-15L | PAC040-15L |
|---|---|---|
| Capacity | 15L | 15L |
| Waterproof | Yes | Yes |
| Dimensions (L*W*H) | 45 x 18 x 15 x 5 cm | 47 x 16 x 15 x 6 cm |
| Weight | 0.4 kg | 0.730 kg |
| Material | Polyester | 500D PVC+TPU |
| Function | Rainproof, Storage for long-distance cycling, Foldable | |
Note: The fully expanded length of the BAG026 model is approximately 53cm. Manual measurements may have small errors; the received object shall prevail.

Figure 1: BAG026-15L Specifications Overview

Figure 2: Product Dimensions
Setup and Installation
Follow these steps to securely attach the saddle bag to your bicycle:
- **Prepare the Bag:** Grasp both ends of the bag opening and fold it down three times to ensure a secure, waterproof seal. Insert the buckles on both sides of the opening and clip them together.
- **Attach to Seat Bow:** Insert the main buckle strap through the bicycle seat bow (the rails under the saddle).
- **Secure Upper Buckles:** Insert the upper and lower buckles of the bag and fix them in place, ensuring a snug fit under the saddle.
- **Secure Seat Post Strap:** Thread the buckle strap through the bicycle seat post.
- **Tighten and Adhere:** Tighten the seat post strap and quickly adhere the magic tape to secure the bag firmly to prevent wobbling.
Video: Step-by-Step Installation Guide for NEWBOLER Bike Saddle Bag

Figure 3: Three-Point Fixation for Enhanced Stability

Figure 4: Detail of Webbing and Buckle Mechanism
Operating Instructions
The NEWBOLER saddle bag is designed for convenience and functionality during your rides:
- **Main Compartment:** Utilize the 15L main compartment for larger items. The roll-top closure ensures contents are protected from the elements and allows for flexible capacity adjustment.
- **Side Pockets:** Use the outside zip pocket for quick access to small items such as your mobile phone, charging cable, earphones, or wallet.
- **External Strapping:** The robust strapping design allows for carrying additional items up to 30KG, such as a water bottle or helmet, securely on the exterior of the bag.
- **Tail Light Attachment:** A multi-layer tail light buckle design is integrated on the rear of the bag, allowing you to easily attach a tail light for enhanced visibility, even when the bag is fully packed.
- **Night Riding Safety:** The bag features reflective elements to improve your visibility to other road users during night rides, contributing to safer cycling.
- **Skeleton Design:** The internal keel support provides a sturdy and stylish structure, helping the bag maintain its shape even when empty or partially filled.

Figure 5: Example of Items Carried (15L Capacity)

Figure 6: Convenient Outside Zip Pocket

Figure 7: Tail Light Attachment Point

Figure 8: Reflective Design for Night Safety

Figure 9: Skeleton Design with Keel Support
Maintenance
- **Cleaning:** Wipe the bag with a damp cloth and mild soap. Do not machine wash or tumble dry, as this may damage the waterproof coating and material integrity.
- **Drying:** Allow the bag to air dry completely before storage to prevent mildew and unpleasant odors.
- **Waterproof Care:** While the bag is designed to be waterproof, it is not intended for full submersion in water. Avoid prolonged immersion to maintain its water-resistant properties.
- **Storage:** Store the bag in a cool, dry place away from direct sunlight when not in use to preserve material quality and color.

Figure 10: Waterproof Effect Demonstration
Troubleshooting
- **Bag Wobbling:** If the bag wobbles excessively during your ride, ensure all attachment straps (to the seat bow and seat post) are tightened securely. The three-point fixation system is designed for stability, but proper adjustment is crucial. Re-adjusting the straps can often resolve this issue.
- **Perceived Capacity Discrepancy:** Some users have noted that the actual usable volume might feel slightly less than the stated 15L, or that the 10L and 15L versions appear similar in size. Ensure items are packed efficiently, and the roll-top closure is properly sealed and rolled down multiple times to maximize space and maintain a compact form.
User Tips
- For mountain biking or rides on rough terrain, double-check that the bag is extra secure to prevent excessive movement.
- The bag is highly versatile and suitable for carrying a change of clothes, a towel, tools, snacks, and other essentials for day trips or longer cycling adventures.
- Take your time to properly adjust all straps during initial installation to achieve optimal stability and prevent any wobbling, especially when carrying heavier loads.
- The overall quality of the bag is generally well-regarded by users, making it a reliable choice for your cycling storage needs.
- Be aware that there might be slight variations in perceived capacity or size between different batches or models (e.g., 10L vs. 15L), as noted by some users.
Warranty and Support
For any questions regarding product functionality, maintenance, or potential warranty claims, please contact the seller or manufacturer directly. It is recommended to keep your purchase receipt as proof of purchase for any support inquiries.