Last Updated on July 11, 2025
Running shoe tech has exploded in recent years. From foam-packed midsoles to carbon fiber plates, every brand is racing to push the boundaries of comfort, support, and energy return. But one shoe went far off the beaten track—Enko. Built with mechanical springs and shock absorbers instead of foam, the Enko G4 was a bold attempt to revolutionize running shoes.
This post dives into what made the Enko shoe so unique, how it worked, and why you probably can’t get your hands on it today.
What Are Enko Running Shoes?
Enko running shoes were created by a French startup and launched on Indiegogo around 2015. Unlike conventional shoes, they featured spring-loaded mechanical cushioning—think miniature bike shocks under your feet. The G4 model was the company’s most advanced release, designed to reduce joint impact and return energy with each step.
Despite early buzz, the Enko project appears to have stalled, and the shoes are now hard to find for purchase.
Review of the Enko G4 Running Shoe
We tested and reviewed the Enko G4 to better understand this engineering-first approach to running footwear.
Upper
The upper combines leather and mesh for structure and breathability. Leather reinforces high-stress zones around the toe and heel, while mesh keeps airflow consistent across the top of the foot. It feels soft and adaptable—comfortable enough for long runs or walks.
One standout feature is the built-in Run/Walk mode switch. Located on the outside of each heel, this lever allows you to toggle between settings:
- Run Mode: Springs are fully activated for impact absorption and energy return.
- Walk Mode: Springs are loaded and more stable for slower movement.
Changing modes is easy: just lift your heel and push the lever forward.
Cushioning System
The cushioning is where Enko really shines. The mechanical system absorbs up to 25mm of shock with each step using spring-loaded technology. Unlike foam that compresses over time, these springs maintain their function for longer distances.
The shoes come with seven different cushioning levels tailored to the user’s weight—from 45kg (99 lbs) to 115kg (254 lbs). This personalization is rare in any running shoe and helps ensure the best experience whether you are a neutral runner, overpronator, or supinator.
Outsole and Durability
The Enko sole features a studded outsole ideal for road running and hard surfaces. However, it’s not well-suited for trail or rough terrain. That said, it’s impressively durable—rated for up to 2,000km of use.
Worried about wear and tear? The studs are replaceable, extending the shoe’s lifespan even further.
Weight and Breathability
Despite the mechanical components, the shoe is surprisingly lightweight and breathable. Mesh uppers and hollow midsole design help keep it cool and manageable over long runs.
Style and Availability
The shoe was available in a range of colors when active. But as of 2025, it appears to be unavailable for purchase online, and the company’s website is inactive. That means what was once a promising product may now be a collector’s item.
Pros and Cons of the Enko G4
Here’s a summary of what we liked—and didn’t like—about this unique running shoe.
Pros
- Only shoe that adjusts cushioning to the runner’s weight
- Up to 2,000km lifespan
- Innovative mechanical shock absorption
- Great for road runners of all gait types
- High breathability and lightweight design
- Easily switch between walking and running modes
Cons
- Not suitable for trail or rough terrain
- High price tag (>$300 USD at launch)
- Currently unavailable or discontinued
- Not race legal for most events (due to mechanical advantage)
Is Enko Still in Business?
As of now, Enko appears to be inactive. The Indiegogo page hasn’t been updated in years, and the official website is offline. While used or deadstock pairs occasionally appear on resale sites, the future of the brand is uncertain.
The Enko G4 wasn’t just a running shoe—it was an engineering experiment. With adjustable springs, personalized cushioning, and mode switching, it offered something no other shoe had. It’s a shame this project didn’t gain long-term traction, because it showed what future footwear might look like.
For now, Enko remains a curious footnote in running shoe history.
