What Kind of Shoes Have the New Balance "FuelCell Propel V4" Become? Equipped with a TPU Plate for Major Evolution!

The "FuelCell Propel" series, known for its high cushioning and bouncy ride, had been an entry-level model that adopted the midsole material "FuelCell" which excelled in both responsiveness and lightness.

In this update, the addition of a TPU (Thermoplastic Polyurethane) plate positions it as an entry-level model for shoes featuring plates. What was the intention behind this update and how has the "FuelCell Propel" evolved? We spoke to Aoi Mamiya from the New Balance Japan Footwear Planning Department, responsible for the Running Category.

Bridging Carbon Plate Shoes & Non-Plate Shoes

Upon their initial release, thick-soled running shoes with carbon plates were worn exclusively by top athletes and elite runners. However, they have since gained traction among everyday runners, many of whom use them for races and training.
 
"If you look at marathon events, you will see many amateur runners participating in races with thick-soled shoes that feature carbon plates. The market for running shoes has become polarized, with carbon plate-equipped shoes for races and non-plate shoes for jogging. The FuelCell Propel v4 was developed as a model to bridge these two categories."
 
Thick-soled shoes with carbon plates, designed with elite runners in mind, are known for their high responsiveness. However, depending on the level of the runner, these shoes can be overkill, placing unexpected stress on the lower body and potentially causing injuries in previously unstrained areas. Even at the university level, where students compete in relay races, the use of carbon-plated shoes in training may be restricted to prevent injuries and strengthen legs. Regardless of the propulsion benefits, they are not always the best choice for continuous wear.
 
Nonetheless, if you plan to use carbon-plated shoes in a race, it is crucial to train with them to familiarize yourself with their feel and maximize their assistive effect.
 
"The TPU plate in the Propel v4 is softer and more flexible than a carbon plate. While it provides a similar sense of responsiveness, it is milder compared to carbon. This makes it suitable not only for training—jogging, pace runs, build-up runs—but also for recreational runners aiming for sub-4 or sub-5 marathon times."