Spec analysis — not yet tested
What this page is. A podiatrist’s reading of the manufacturer’s published specifications for the New Balance Fresh Foam X 860v15. Nothing on this page has been measured, worn or scored by us yet. There is no score and no seal here on purpose: under our standard, a number only appears once a pair has been on the bench and on the road. When this shoe is tested, this page is replaced by the full review and the change is logged.
The 860 is the stability twin of the 880 and the New Balance shoe most often written on a podiatrist’s prescription pad for flat feet. Version 15 arrived in spring 2026 with a Stability Plane and a lot of weight. Here is what New Balance publishes, what it leaves out, and what a foot and ankle surgeon reads into the figures before the pair is measured.
What New Balance says the Fresh Foam X 860v15 is
New Balance lists the 860v15 as a stability shoe, “Best for Everyday Running”, promising “reliability over the long haul and sustained comfort over all distances”. The midsole is Fresh Foam X with what New Balance calls a Stability Plane; the upper is listed simply as synthetic. Like the 880, it comes in four widths for men (B, D, 2E, 4E) and four for women (2A, B, D, 2E) at $149.99, and both product pages display an APMA Accepted badge. New Balance does not publish stack height, a launch changelog or a removable-insole statement for this model.
Manufacturer specifications
Source column tells you where each figure comes from. “New Balance” means the brand’s own US product page. A retailer name means the brand does not publish that figure and a retailer does. “Not published” means nobody reliable does — those are the figures our bench measures first.
| Specification | Figure | Source |
|---|---|---|
| Category | Stability, daily trainer | New Balance |
| Support system | Stability Plane in a Fresh Foam X midsole | New Balance |
| Weight, men's | 331 g / 11.7 oz (size not stated); 335 g at size 9 per Running Warehouse | New Balance |
| Weight, women's | 265 g / 9.3 oz (size not stated) | New Balance |
| Heel stack | Not published by New Balance. 43 mm | Running Warehouse (retailer) |
| Forefoot stack | Not published by New Balance. 35 mm | Running Warehouse (retailer) |
| Drop | Not published by New Balance. 8 mm | Running Warehouse (retailer) |
| Midsole | Fresh Foam X with Stability Plane | New Balance |
| Outsole | Not named by New Balance; blown rubber | Running Warehouse (retailer) |
| Upper | Synthetic | New Balance |
| Widths, men's | B, D, 2E, 4E | New Balance |
| Widths, women's | 2A, B, D, 2E | New Balance |
| Removable insole | Not published | — |
| APMA Seal of Acceptance | APMA Accepted badge displayed on both product pages | New Balance |
| List price | $149.99 | New Balance |
Figures checked September 6, 2026. Manufacturer pages: men’s · women’s.
What the spec sheet suggests — and what only a test can answer
This is a heavy shoe, and for some patients that is the point. New Balance’s own figure is 11.7 oz for the men’s shoe — a full 1.2 oz more than the 880v15 and heavier than almost every daily trainer we see. Weight usually buys structure: more rubber, more foam, a firmer plate. For a heavy runner, a flat foot that needs holding, or a walker who wants the shoe to do the work, that is a fair trade. For a fatigued limb or an older walker it is a real cost, and it is the first thing we put on a scale.
A “Stability Plane” is a plate, not a post. New Balance does not explain the mechanism on its product page; third-party reviewers describe an embedded plate that stiffens the midsole against torsion. That is closer to the old-fashioned way of controlling a flat foot than sidewalls are, and if the torsional rigidity is as high as a plate suggests, this is one of the few current shoes we would shortlist for a severely pronated or posterior-tibial-tendon foot. That is a hypothesis; our rigidity score is the test.
Four widths again, on a stability platform. A 4E stability shoe is close to unique. If you have a wide flat foot and have been squeezed into D-width stability shoes, this is the reason the 860 keeps getting prescribed.
What only the test can answer: New Balance publishes neither stack nor drop for this shoe — the 43/35 mm and 8 mm figures are Running Warehouse’s — so the geometry itself is unverified. Add torsional rigidity, heel-counter stiffness, insole removability and orthotic volume, none of which the brand publishes.
Who this shoe is probably for
Read from the published specification, not from wear. Treat these as hypotheses the test will confirm or overturn.
- Flat feet and moderate-to-significant overpronation that want a firmer, plate-based platform.
- Wide flat feet — 2E and 4E in a stability shoe is rare.
- Heavier runners and walkers who want structure and do not mind the weight.
- You want a light shoe — at a published 11.7 oz this is not one.
- Mild pronation with a tender arch — a sidewall shoe (Arahi, Guide) may be easier to tolerate.
- You run custom orthotics — insole removability and volume are unpublished.
What changed from the previous version
New Balance publishes no changelog for the 860v15; its product page listed pre-order availability from April 1, 2026. Third-party reviewers describe a stiffer embedded plate than the v14, which we have not verified against any brand source. Both versions will be compared on the bench when we have them.
Where to buy
Disclosure: the links below are paid links. If you buy through them Amazon pays us a commission at no cost to you. Commissions never influence a score, a ranking or the seal, and this page carries no score because the shoe has not been tested — see our independence policy.
Amazon listings are colourway-specific; the button opens one common colourway and you can switch colour and width there. Manufacturer list price $149.99 on September 6, 2026; prices move, check the listing. Also sold directly by New Balance.
Questions people ask about the Fresh Foam X 860v15
Is the New Balance 860v15 a stability shoe?
Yes. New Balance lists it as a stability shoe with a Stability Plane in the Fresh Foam X midsole. Its neutral twin is the 880v15.
How heavy is the 860v15?
New Balance publishes 331 g / 11.7 oz for the men’s shoe and 265 g / 9.3 oz for the women’s, size not stated.
Does the 860v15 come in wide?
Yes — men’s B, D, 2E and 4E; women’s 2A, B, D and 2E, per newbalance.com.
Is the 860v15 good for flat feet?
On paper it is the most structured shoe in this group and the one we would shortlist first for a flat, pronating foot. That stays a hypothesis until the torsional rigidity is measured.
What happens next
This model is in the queue for bench testing under Standard v1.0: weight on our scale at men’s US 10, heel and forefoot stack with calipers, internal toe-box width and depth, torsional rigidity, heel-counter stiffness and an Orthotic Volume Rating with a real orthotic inside it. If it goes on to wear testing, the nine-criterion scorecard and the seal decision follow. Every number will carry its own provenance label so you can see which figures we measured and which we are still quoting. If you own a pair and something on this page contradicts what is on your feet, tell us — corrections are logged.
Page type: spec analysis. Acquisition: not yet purchased. Last verified: September 6, 2026. Author: Tom Biernacki, DPM, FACFAS — board-certified foot and ankle surgeon, about.