Important Safety Information
Read and understand all instructions and warnings before assembling and using this trampoline. Failure to follow these instructions may result in serious injury or death. Keep this manual for future reference.
General Safety Guidelines
- Adult Supervision Required: Always ensure competent adult supervision when the trampoline is in use.
- One User at a Time: Only one person should use the trampoline at any given time to prevent collisions.
- No Somersaults or Flips: Avoid somersaults or flips, as these can lead to serious head and neck injuries.
- Inspect Before Each Use: Check the trampoline for damaged, worn, or missing parts before each use. Do not use if any components are compromised.
- Clear Surrounding Area: Ensure there is adequate clear space around the trampoline, free from obstacles, structures, or other hazards.
- Weight Limit: Do not exceed the maximum weight recommendation of 400 pounds.
- Proper Entry and Exit: Use the provided ladder for safe entry and exit. Do not jump on or off the trampoline.
- Weather Conditions: Do not use the trampoline in wet, windy, or icy conditions. Secure the trampoline during strong winds.
Warning Labels
Familiarize yourself with all warning labels affixed to the trampoline components. These labels provide critical safety information and should not be removed or obscured.

Image: Children enjoying the trampoline, highlighting the importance of safe play.
Package Contents
Your GYMAX trampoline set is delivered in multiple boxes. Please ensure all components are present before beginning assembly. The entire set will be delivered in 3 boxes, and you may receive them at different times.
What's Included
| Box | Contents |
|---|---|
| Box 1 | Trampoline frame, springs, and safety pad |
| Box 2 | Trampoline frame, ladder, jumping mat, basketball hoop, and accessories |
| Box 3 | Net poles, enclosure net, and springs |
The package also includes installation tools, a basketball, and a ball pump.

Image: Visual representation of included components and packaging details.
Assembly Instructions
Assembly of the GYMAX trampoline requires at least two adults. Follow these instructions carefully to ensure proper and safe setup. Installation tools are included, and the self-locking system requires no screws for certain connections.
Step-by-Step Assembly Guide
- Unpack Components: Carefully unpack all boxes and verify that all parts listed in the 'Package Contents' section are present and undamaged.
- Assemble the Frame: Connect the circular frame sections. The self-locking system allows for secure connections without additional screws.
- Attach W-Shaped Legs: Securely attach the W-shaped legs to the main frame. Ensure all connections are tight and stable.
- Install Jumping Mat: Lay the jumping mat in the center of the frame. Begin attaching the springs to the mat and frame, following a symmetrical pattern (e.g., opposite sides) to ensure even tension. The 15FT model uses 96 springs.
- Place Safety Pad: Cover the springs and frame with the safety pad, ensuring all metal parts are adequately covered to prevent contact during use.
- Assemble Enclosure Poles: Connect the enclosure poles. These poles feature a reinforced and unbreakable connection design.
- Attach Enclosure Net: Secure the high-density enclosure net to the poles and the trampoline frame. Ensure the net is taut and properly secured to prevent falls. The internal net design prevents contact with springs and poles.
- Install Basketball Hoop: Attach the basketball hoop to one of the enclosure poles. Ensure it is securely fastened. The hoop features a thickened PP backboard and a 12-inch basketball rim with a wear-resistant net.
- Attach Ladder: Hook the 2-step ladder to the trampoline frame for easy and safe access. The non-slip plastic stairs are wider for stability.
- Final Inspection: Before first use, double-check all connections, springs, net, and padding to ensure everything is correctly assembled and secure.

Image: Detail of the hot-dip galvanized steel pipes and W-shaped legs, emphasizing durability.

Image: Detailed view of the jumping mat's stitching and galvanized springs, indicating robust construction.
Operating Instructions
Follow these guidelines for safe and enjoyable use of your GYMAX trampoline.
Using Your Trampoline
- Enter Safely: Always use the ladder to climb onto the trampoline.
- Jump in the Center: Aim to jump in the center of the mat for optimal bounce and stability.
- Maintain Control: Always jump within your skill level and maintain control of your bounce.
- Exit Safely: Stop jumping completely before using the ladder to exit the trampoline. The double zipper with buckles ensures secure entry and exit.
Using the Basketball Hoop
- Shoot Responsibly: Use the provided basketball and pump to enjoy shooting hoops.
- No Dunking or Hanging: Do not dunk or hang on the basketball rim, as this can cause damage to the hoop or lead to injury.

Image: A child using the integrated basketball hoop, illustrating its features.

Image: Demonstrates the secure double zipper and buckle system for the enclosure net.
Maintenance and Care
Regular maintenance ensures the longevity and safety of your trampoline.
Regular Inspection
- Frame: Check for any signs of rust, bends, or cracks in the galvanized steel frame.
- Springs: Inspect all springs for stretching, damage, or corrosion. Replace any compromised springs immediately.
- Jumping Mat: Look for tears, holes, or excessive wear on the PP jumping mat. Ensure the 8-row stitching is intact.
- Enclosure Net: Examine the high-density net for rips, holes, or loose connections. Ensure the zipper and buckles function correctly.
- Safety Padding: Check the 3-layer safety pad and 10mm anti-collision EPE foam covers on the poles for damage or displacement.
Cleaning
Clean the jumping mat, safety pad, and net with mild soap and water. Avoid harsh chemicals or abrasive cleaners that could damage the materials. Rinse thoroughly and allow to air dry.
Storage
If possible, disassemble and store the trampoline indoors during prolonged periods of non-use or severe weather conditions to extend its lifespan. The weather-resistant PP jumping mat has passed a 5000-hour UV test, and the hot-dip galvanized steel frame resists rust, but protection from extreme elements is always recommended.

Image: Demonstrates the UV and weather resistance features of the trampoline.
Troubleshooting
This section addresses common issues you might encounter with your trampoline.
Common Issues and Solutions
- Uneven Bounce: Ensure all springs are correctly attached and evenly tensioned. Check for any bent or damaged springs.
- Squeaking Noises: Lubricate spring connections or frame joints with a silicone-based lubricant if persistent squeaking occurs.
- Net Sagging: Verify that the enclosure net is properly secured to all poles and the frame. Adjust tension if necessary.
- Parts Missing/Damaged: If you discover missing or damaged parts upon delivery, contact the manufacturer's customer support immediately.
Product Specifications
Detailed specifications for the GYMAX 15FT Internal Net Recreational Trampoline.
| Feature | Detail |
|---|---|
| Brand | GYMAX |
| Model Name | Kids Trampoline with Basketball Set |
| Style | 15FT Internal Net |
| Color | Black+Blue |
| Frame Size | 15 feet |
| Product Dimensions (LxWxH) | 180"L x 180"W x 108"H (15 ft x 15 ft x 9 ft) |
| Shape | Round |
| Frame Material | Alloy Steel (Hot-dip galvanized) |
| Jumping Mat Material | Polyethylene (PP) |
| Safety Pad Material | Polyvinyl Chloride (PVC) |
| Number of Springs | 96 |
| Maximum Weight Recommendation | 400 Pounds |
| Leg Height | 3 ft |
| Net Height | 6 ft |
| Jumping Area Diameter | 13.6 ft |
| ASTM Approved | Yes |

Image: Comprehensive size chart detailing dimensions and weight capacities for various trampoline sizes.
Warranty and Support
Warranty Information
This GYMAX trampoline comes with a 90-day warranty. Please retain your proof of purchase for any warranty claims.
Customer Support
For any questions, concerns, or assistance with assembly, parts, or warranty claims, please contact the GYMAX customer support team. Refer to the contact information provided with your purchase or visit the official GYMAX website for support details.
