The Nike Air Max 720, with its bold, futuristic design and impressive full-length Air Max unit, quickly became a popular choice among sneaker enthusiasts. However, like all footwear, it's susceptible to wear and tear, and one common issue reported by owners is air leaking from the Air Max cushioning. This article delves into the reasons why your Nike Air Max 720 might be losing air, how to diagnose the problem, potential solutions, and what to do if your warranty is no longer valid. We'll explore everything from simple punctures to more complex manufacturing defects, providing a comprehensive guide to troubleshooting this frustrating issue.
Understanding the Nike Air Max 720 Air Unit
Before diving into troubleshooting, it's crucial to understand the construction of the Air Max 720's air unit. Unlike previous Air Max models with visible air bubbles, the 720 features a continuous, full-length Air unit that stretches the entire length of the sole. This unit is incredibly flexible and responsive, providing superior cushioning and comfort. However, this extended surface area also means there are more potential points of failure. The air unit itself is a sealed system, encased in a durable TPU (Thermoplastic Polyurethane) shell. This shell protects the air bag from punctures and abrasions, but it's not impervious to damage.
Common Causes of Air Leakage in Nike Air Max 720
Several factors can contribute to air escaping from your Nike Air Max 720s. Let's break them down into the most common culprits:
* Punctures and Tears: This is perhaps the most straightforward reason for air loss. Sharp objects like pins, nails, or even small debris can pierce the TPU shell, allowing air to escape. This is especially likely if you frequently wear your shoes in environments with potential hazards, such as construction sites or areas with rough terrain. Inspect the sole carefully for any visible punctures or tears. Even tiny holes can cause significant air loss over time.
* Manufacturing Defects: While less common, manufacturing defects can lead to air leakage. These defects might include imperfections in the TPU shell's sealing process or flaws in the air unit itself. If you suspect a manufacturing defect, contacting Nike customer service is crucial. They may offer a repair or replacement, depending on your warranty status and the nature of the defect.
* Age and Wear: Over time, the TPU shell can degrade due to exposure to sunlight, extreme temperatures, and general wear and tear. This degradation can weaken the material, making it more susceptible to punctures and allowing for microscopic cracks to form, leading to slow air loss. This is a natural process, and while it can't be entirely prevented, proper care and storage can extend the lifespan of your shoes.
* Improper Use and Storage: Storing your shoes in extreme temperatures or exposing them to harsh chemicals can also compromise the integrity of the TPU shell and lead to air leakage. Avoid leaving your Air Max 720s in direct sunlight for extended periods.
* Excessive Bending and Stress: While the Air Max 720's air unit is designed to be flexible, excessive bending or twisting can put undue stress on the TPU shell, potentially causing micro-fractures or weakening the material over time.
Diagnosing the Air Leakage Problem
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