Arch support
M: 210g | W: 179g
Heel to toe drop
M: 6mm | W: 6mm
Heel height
M: 23mm | W: 23mm
Forefoot height
M: 17mm | W: 17mm
Widths available
M: Normal - D | W: Normal - B
Show moreless facts


Shoes best for road, track and light gravel. See the best road shoes.


Shoes best for trail, off road, mountains and other unstable surfaces. See the best trail shoes.

Good to know

As long as you stick to the road or path, and if you want just one running shoe, buy a road running shoe.

Neutral / cushion / high arch

Shoes for runners who does not need any additional arch support (Around 50% of runners). Best for people with high or medium high arches. See the best neutral shoes.

Stability / overpronation / normal arch

Shoes for runners who needs arch support (Around 45% of runners). Best for runners with a normal arch. See the best stability shoes.

Motion control / severe overproanation / flat feet

Shoes for runners who needs a lot of arch support. Best for runners with flat feet. See the best motion control shoes.

Good to know

- Rule of thumb: If in doubt, buy neutral shoes to avoid injuries.
- More about arch support in this video.
- Find your arch type by following steps from this video.

Daily running

Cushioned shoes for your daily easy running. Great comfort. See best shoes for daily running.


Lightweight shoes good for races, interval training, tempo runs and fartlek. Here are the best competition running shoes.

Good to know

If you want just one pair of shoes, buy a shoe for daily running.

The height difference from the heel to the forefoot, also known as heel drop, toe spring, heel to toe spring or simply drop.

There are many opinions about what a good heel drop is. We do not recommend any in particular. Lean more in this video.


We spent 8.1 hours reading reviews from experts and users. In summary, this is what runners think:

4 reasons to buy

  • The upper of the Aha II features a breathable one-piece mesh for added comfort and support.

  • It features 360 degrees reflectivity.

  • The outsole of this shoe features the super high abrasion rubber compound which is very durable, according to some reviews.

  • Many runners applauded the light weight construction of the shoe without affecting the shoe’s protective attributes.

2 reasons not to buy

  • Not sufficient traction on wet surfaces, according to some testers.

  • Some runners felt that the cushioning of this shoe is not enough.

Bottom line

The Newton Aha II is designed for runners who are looking for an all-around running shoe. The overall construction of this shoe is ideal for both short and long distance runs. It is a great every day trainer as well.

World wide, Aha II is in the top 50% most popular running shoes. The brand, Newton, is the 19th most popular.

Map: Shows popularity per continent based on 1010 shoes


4.5 / 5 based on 19 ratings

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Expert reviews

Experts are running shoe geeks, who post reviews at youtube, directly at RunRepeat or at their own websites. Each expert is categorized from level 1 to level 5 based on expertise. See stats on expert reviews and how we calculate scores here.

Are you an expert? Apply to contribute here.

80 / 100 based on 4 expert reviews

  • 84
    Reggie RoweLevel 1 expert
    by Reggie Rowe
    As long as there's no pain and I'm having fun in them, I'm gonna keep on running in them.
  • 79
    Ross WiseLevel 1 expert
    by Train Wise Fitness
    Great overall shoe. Another great product from Newton. Just not always the shoes for me.
  • 80
    Mwangi GitahiLevel 3 expert
    by Endurance Magazine
    The Newton Aha 2 features a lower-profile design than many of the brand’s previous models, and hits a happy medium between lightness and cushioning. 
  • 80
    Peyton HoyalLevel 3 expert
    by Running Shoes Guru
    Neutral runners will enjoy the ergonomic outsole design and lightweight cushioning, while those with more pronation will appreciate the stabilizing effect the forefoot lugs provide.
  • Show moreless reviews
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These are visual presentations, not reviews

  • Sunshine Shop Zappos
    This shoe right here is for the versatile and neutral runner, which is ideal for new and experienced runners alike.
  • Richard Shop Zappos
    Whether you are new to running or experienced, these shoes are awesome for you. You have a one-piece, seamless engineered mesh upper with supportive synthetic overlays throughout.

Updates to Aha II

The Aha II from Newton Running features an upper unit that utilizes a material that is more robust than the original Aha. While the 1st version’s upper had a more woven fabric-like look to it, the Aha II actually uses a sturdier and more full-bodied mesh material that’s still breathable and comfortable.

The reflectivity on the upper unit has been enhanced. The entire upper now has a slightly shinier look. The shiny decals on the tongue, sides and heel purposefully improve visibility in low-light conditions. So, the runner can be more confident when running during nighttime.

The mid-sole unit features a set of cushioning systems that deliver a soft and responsive platform for those who want to experience balance and flexibility. The runner also receives protection from impact and get shock energy from a unit that absorbs the impact shock.

The outsole was made from a high quality compound that delivers responsible protection from wear and tear. It’s also sticky enough that it’s capable of giving traction when the foot is stepping on dry and even wet surfaces. Confidence will surely be increased when traversing puddles and other water-filled ground.

Aha II size and fit

The Newton Aha II has a standard running shoe length. It’s available in sizes that adhere to the preferences of most runners. It’s heel, mid-foot and forefoot sections have a medium width, so it accommodates runners with medium-sized feet. Its semi-curved design lets the natural shape of the foot acclimate well to it.


The outsole unit of this running shoe features the SHARC technology. It’s made up of a compound that’s highly resistant to abrasion and wear. It staves of damage and tearing because of its high quality nature. It’s also capable of providing traction over dry and wet surfaces.

This layer has flex grooves that allow the player natural movement. With this mechanic in place, it’s easier for runners to go through the gait cycle, especially when it comes to the toe-off.


The mid-sole unit features and EVA foam that is able to deliver plush cushioning that’s also durable. It’s soft and it doesn’t break down easily.
The Action/Reaction Technology is placed in the heel and forefoot area, and they’re made up of external nodes that absorb shock and then release that energy to enable to the runner to get a better and more fulfilling stride.

The P.O.P.3 is the platform that’s designed by Newton Running. This is comprised of tapered nodes that go into compartments that are filled with polyurethane. This design offers a comfortable and non-restrictive underfoot sensation that’s consistent.

A Biomechanical Sensor Plate in the metatarsal area allows the wearer to sense the ground beneath. It doesn’t make the platform thin or ineffective, but it goes gives sensory feedback to prepare and engage the foot during running.


The material that’s used in the upper is the Open Mesh. It’s a soft yet full-bodied material that offers comfortable and breathable coverage. It keeps the foot dry and cool because it lets air enter the shoe’s interior, and it is capable of drying quickly.

The overlay system has been integrated to support the natural anatomy of the foot. It doesn’t have any wedges or parts that might irritate the skin; it secures the foot snugly, but comfortably.

Most of the upper unit has been enhanced with reflective coating that lets it be seen during low-light conditions. The highlighted areas, such as the heel and tongue have more of this reflective coating. It makes the runner more confident when traversing the roads during nighttime, as it helps in preventing accidents.

The Metatarsal Pad Sock Liner provides more comfort for the underside of the foot. It carries the foot well while also allowing balance and natural movement, notably in the forefoot area.


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