Updates to Newton Gravity 9

The Newton Gravity 9 is an update to a well-known series of racing shoes that can accommodate the natural gait progression of the foot. The elements that have graced the eighth iteration of this roster largely remain the same when transitioning to the ninth generation. But the upper unit now conforms itself to the shape of the foot. Security and natural movement are the tenets of the form-welcoming design.

Size and fit

Sizing schemes that adhere to the regular measurements and expectations were used when the Newton Gravity 9 was made. Runners are welcome to use the comfortable size option when desiring to get a pair. However, it is highly recommended to try this shoe first before making a purchase decision to help with the perception of just-right coverage.

The sideways fit is influenced by the upper unit’s capacity to follow the outline of the foot that it is covering. The semi-curved platform also helps the silhouette when it comes to accommodating the foot and keeping it in place.


The outsole unit of the Newton Gravity 9 is made of s.h.a.r.c. or super high abrasion rubber compound. This element is tasked with protecting the high-wear areas from the abrasive nature of the surfaces. It is touted to last long. Furthermore, it has a grippy nature that allows it to stick to the ground and maintain the foot-to-ground balance.

A flex groove near the forefoot section permits the platform to transition smoothly towards the toe-off phase of the gait cycle.

The Action/Reaction Technology™ is a Newton staple. This feature is made up of a mechanical grip-and-cushion accouterment near the ball of the foot, with five lugs serving as the source of surface adhesion and extra oomph to the underfoot experience. When pressure or weight is applied to the platform, the lugs physically recede to into the platform, absorbing energy and permitting full ground contact. When the same pressure is removed from the shoe’s sole, then the Action/Reaction elements, spring back into place with a burst of energy that may help to boost the quality of the forefoot lift.


Newtonium foam is used for the midsole unit of this running shoe. The purpose of this material is to provide a comfortable surface for the foot to enjoy. The light and responsive construction offer comfort and the capability to feel energized and unencumbered.

The ETC Sockliner is a thin piece of cushioning that is placed right above the primary cushioning system. The job of this extra feature is to provide a soft surface for the underside of the foot. It has a fabric surface to emphasize comfort and a welcoming ride. Also, it has antimicrobial capacities to nurture a clean and healthy interior.


The upper unit uses engineered mesh that has been configured to accommodate the natural outline of the foot. 3D mapping helps in determining the strategic placement and use of the fabric, giving a feeling of a custom-made wrap that adapts to the anatomical structure of the wearer’s foot. Engineered mesh is a staple in many modern running shoe series like the Hoka One One Arahi.

Breathability comes from the helping of ventilation holes that graces the makeup of the cloth-like mesh upper. Environmental air can quickly enter the interior compartment and maintain a cool and dry ride.

Printed overlays grace the sides, the bridge, and the forefoot. These synthetic prints are designed to bolster the upright construction of the upper unit. They also help in delivering a snug yet secure coverage.

The collar and the vamp have stitch-reinforcements to retain the shape of the design, as well as the durability.

A bit of padding is included in the collar design. Its purpose is to prevent the foot from exiting the shoe unintentionally. Extra eyelets are even fashioned near the collar to help with heel lockdown.

A traditional lacing system is used for the throat of this product. The flat shoelaces are meant to permit the runner to adjust the tightness or looseness of the wrap, thus encouraging personalized manipulation of the fit.

Reflective elements have been included in the coating of the overlays to make the product visible when exposed to a beam of light. Nighttime runners are the ones who are sure to benefit from such inclusion as it makes them visible to vehicles and other pedestrians on the road.

Facts / Specs

Terrain: Road
Weight: Men 8oz / Women 6.8oz
Drop: 3mm
Arch support: Neutral
Collection: Newton Gravity
Pronation: Neutral Pronation / Supination / Underpronation
Arch type: High arch

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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.