Best Shoes for Tarsal Coalition
A coalition is a rigid flat foot, so the motion-control shoe controls nothing. What the shoe must do instead, with the midsole hardness figures behind it.
On this page
- Quick answer: what to look for
- The diagnosis most people arrive with is the wrong one
- How common is it, actually
- What a fused joint changes about the shoe’s job
- Shock absorption is the specification, and nobody prints it
- The shoes whose published figures fit the brief
- The one we would not choose for this diagnosis
- What the research actually supports — and where it stops
- Questions people ask
- What happens next on this page
Spec analysis — not yet tested · Published September 2026
Nothing on this page has been measured by us. Every shoe figure below is either the brand’s own published specification or a laboratory measurement published by RunRepeat, which cuts shoes in half and measures them, and the source is printed beside each one. No shoe here carries a score or the Podiatrist Tested seal. This page is about footwear only: a tarsal coalition is diagnosed on imaging, and what to do about one is a conversation with a foot and ankle surgeon, not with a shoe site. How we test →
A tarsal coalition is an abnormal bridge — bone, cartilage or fibrous tissue — between two of the bones in the back of the foot. The practical consequence is that a joint which is supposed to move does not, and the two joints that matter most for this are the ones doing the foot’s shock absorption and its adaptation to uneven ground. Almost every shoe recommendation anyone with a coalition has ever been given was written for a different foot, and this page is about why that matters and what changes.
The diagnosis most people arrive with is the wrong one
A coalition in the back of the foot often produces a flat-looking, stiff foot in a teenager or young adult, sometimes with recurrent ankle sprains and pain that comes on with activity and settles with rest. From the outside that looks like a flat foot, and it is treated as one. The best evidence that this happens comes from a 2022 cohort presented in Foot & Ankle Orthopaedics, in which two fellowship-trained foot and ankle surgeons re-read 800 weightbearing CT scans.
- Most of the coalitions had not been diagnosed. Forty-one feet had a coalition on CT. The clinical diagnosis had been made in only 15. Twenty-six symptomatic feet had been missed.
- The commonest wrong label was flat foot. Of those 26 missed feet, 16 carried a clinical diagnosis of congenital or acquired flatfoot. The rest had been called subtalar or talonavicular arthritis, peroneal tendinopathy, cavovarus deformity, post-traumatic ankle arthritis or subtalar impingement.
- And a coalition is not reliably a flat foot at all. Across the 41 feet the hindfoot was valgus in 19 and neutral in 18, with the remainder in varus. The textbook association with flatfoot deformity held in fewer than half.
Presented as a conference abstract, not a full peer-reviewed paper — we say so because it matters how much weight a reader should put on it. It is a single-centre retrospective read of imaging, and its value here is the direction of the error, not a precise rate. Source details below.
That is the whole reason this page exists separately from our flat feet and overpronation guides. Those pages are right for the foot they are about. They are written for a foot that moves too much, and the intervention they describe — a firmer medial side, a post under the arch, a shoe that resists collapse — is aimed at a motion. If the joint is bridged, that motion is not available to be controlled, and the shoe is bracing against something that is already immobile.
| What you can tell from the outside | Flexible flat foot | Tarsal coalition |
|---|---|---|
| Arch when you sit and lift the foot off the floor | An arch appears | Often stays flat, or the shape barely changes |
| Rolling the foot inward and outward | Moves freely, often too freely | Stiff, and the end of the range can be sharp |
| Age it started making itself known | Any age; often lifelong and painless | Commonly announces itself in the early teens, when the bridge stiffens |
| Ankle sprains | Not characteristic | Repeated sprains that never quite settle are a classic story |
| What settles it | Support and load management | Imaging first — CT or MRI is what makes the diagnosis |
An orientation table, not a diagnosis, and the last row is the point: none of the rows above it is decisive. A coalition is confirmed on imaging, and the cohort described above exists because the outside view is not reliable. See our editorial policy.
One other congenital variant turns up in the same years and on the same foot shape, and is worth separating because the shoe answer is different: an accessory navicular. That one is a tender lump on the inside of the arch that a shoe’s inner upper or an arch support can press directly onto — a fitting problem rather than a stiffness problem, and the foot itself usually still moves.
How common is it, actually
Two numbers are worth holding side by side, because they answer different questions and get quoted interchangeably. How many people have one: published prevalence estimates range from 0.03% to 13%, and a 2022 study in Scientific Reports reviewing bilateral CT scans in 839 patients found an overall prevalence of 6.0%, with talocalcaneal the most common type and 56.5% occurring in both feet — 76% for talocalcaneal specifically. How many people it hurts: a population-based study in JBJS covering 1966 to 2018 found an annual incidence of symptomatic coalition in children of 3.5 per 100,000, peaking between the ages of 10 and 14.
Read together: a coalition is a reasonably common anatomical finding and an uncommon clinical problem. Most are silent. If yours is not, it is worth knowing that the same Scientific Reports study found talocalcaneal coalitions were significantly more often symptomatic than calcaneonavicular ones — and that if you have one on one side, the odds are better than even that you have one on the other, which is a reason for both feet to be imaged rather than one.
What a fused joint changes about the shoe’s job
The subtalar joint sits under the ankle and does two things a shoe cannot easily replace. It lets the heel tilt so the foot can sit flat on ground that is not flat, and it converts a vertical impact into a rotation, which is how the leg absorbs a heel strike without passing all of it upward. A talocalcaneal coalition bridges that joint. A calcaneonavicular coalition bridges a joint just in front of it and stiffens the same complex.
So the three things to ask of a shoe change, and they change in a direction most shoe advice never goes:
- Absorb what the joint no longer absorbs. This is a cushioning question, and cushioning has a measurable property — how soft the foam actually is — which is not the same as how tall the shoe is. It is the one specification this page keeps coming back to.
- Accommodate rather than correct. A stiff foot does not move to a new position because a shoe asks it to; it just gets pressed. Room for a device matters more than a built-in post, which means a removable insole and interior depth.
- Let the shoe do the adapting. The joint that used to handle uneven ground is not going to. A shoe that resists twisting hands that job straight back to a foot that cannot take it — which is the opposite of what we conclude on our cuboid syndrome page, where the midfoot joint is irritable but mobile. Same number, opposite reading, because the mechanics are opposite. Worth being explicit about rather than pretending one rule fits both.
Shock absorption is the specification, and nobody prints it
Every shoe box in the shop tells you how tall the midsole is. None of them tells you how soft it is, and those are different numbers that behave independently. Hardness is measured with a durometer and reported on the Asker C scale — lower is softer. No brand publishes a durometer figure for any shoe. Eight of the 43 shoes on this site have one, all from the same laboratory, and across those eight the relationship between heel height and softness is essentially nil.
| Shoe | Midsole hardness | Heel stack | What that means for a stiff foot |
|---|---|---|---|
| Brooks Glycerin 23 | 29.2 AC | 37.2 mm | Softest measured foam on the site, in a mid-height shoe |
| HOKA Clifton 10 | 34.2 AC | 44.4 mm | Second-softest, and the tallest — the only shoe here that is both |
| Brooks Adrenaline GTS 25 | 34.5 AC | 36.1 mm | Soft foam in a stability chassis — an unusual combination |
| Brooks Ghost 17 | 36.2 AC | 36.2 mm | Almost exactly the laboratory average of 35.6 |
| ASICS Gel-Kayano 32 | 41.3 AC | 39.9 mm | Firmer than average despite the reputation |
| HOKA Bondi 9 | 43.0 AC | 41.3 mm | Very tall and one of the firmest measured — height is not softness |
| Brooks Adrenaline GTS 24 | 44.1 AC | 39.0 mm | The generation before the GTS 25 was 9.6 points firmer |
| Brooks Addiction Walker 2 | 48.7 AC | 35.7 mm | Firmest and shortest on file — and the classic flatfoot prescription |
All eight figures are RunRepeat laboratory measurements of a retail pair, read September 2026; lab average 35.6 Asker C. Lower is softer. The full working, including the finding that stack height and hardness are uncorrelated across these eight, is on our heel fat pad page, and every figure on the site with its publisher is in the shoe spec database.
Look at the last two rows together and the shape of the problem is clear. The Bondi 9 is the shoe people are handed when they say “I need cushioning”, and it is one of the firmest foams here. The Addiction Walker 2 is the shoe people are handed when they say “I have flat feet”, and it is the firmest of all. Both are excellent shoes. Both are aimed at the reader of this page by reputation, and neither is aimed at them by measurement.
The shoes whose published figures fit the brief
Three shoes, chosen on softness and on room for a device, because those are the two things the brief above actually asks for. None has been tested by us, none carries a score, and each one’s drawback is in the same card as its advantage.
Softest measured foam on the site
Brooks Glycerin 23 Spec analysis
On the one property this diagnosis cares most about, it is the best-documented shoe we hold. Its midsole measured 29.2 on the Asker C scale against a laboratory average of 35.6 — genuinely soft rather than soft-for-marketing — in a mid-height 37.2 mm heel rather than a towering one, which keeps the foot closer to the ground on a hindfoot that cannot tilt to correct for a wobble. Its insole is 4.4 mm and removable, so an accommodative device displaces very little.
The honest caveat: the width range is the narrowest of the three, men’s D and 2E only, which is a real constraint on a foot that is often broad and always inflexible. And its torsional rigidity of 14.0 Nm is the higher of the two figures we hold — a shoe that resists twisting, which cuts against the third item in the brief above. We are printing that tension rather than hiding it: on softness it is the clearest choice here, on adaptability it is not.
| Laboratory figure | Value |
|---|---|
| Midsole hardness | 29.2 AC (lab average 35.6) RunRepeat lab |
| Torsional rigidity | 14.0 Nm RunRepeat lab |
| Heel stack · forefoot stack | 37.2 mm · 29.0 mm RunRepeat lab |
| Heel-to-toe drop | 8 mm stated · 8.2 mm measured Brooks · RunRepeat lab |
| Insole | 4.4 mm, removable RunRepeat lab |
| Widths | M: D/2E Brooks |
| List price | $175 Brooks |
The only shoe here that is both soft and tall
HOKA Clifton 10 Spec analysis
At 34.2 Asker C it is the second-softest foam on the site and it sits on the tallest measured heel of the eight at 44.4 mm. Everywhere else on this site we argue that height and softness are different things and that buying one while meaning the other is the commonest mistake in the shop — the Clifton 10 is the shoe where they happen to arrive together. It is offered Narrow through X-Wide in men’s, which is the widest span of the three cards here.
The honest caveat: a tall, soft platform is less stable underfoot, and a hindfoot that cannot tilt has less ability to catch itself when the platform moves. If the story includes repeated ankle sprains — which it often does with a coalition — that is a real trade rather than a theoretical one, and it is worth walking in before buying. The Clifton 11 is the current generation; we hold the laboratory hardness figure for the 10, not the 11, and we are not going to assume the foam carried over unchanged.
| Laboratory figure | Value |
|---|---|
| Midsole hardness | 34.2 AC (lab average 35.6) RunRepeat lab |
| Heel stack | 44.4 mm measured · 42 mm stated RunRepeat lab · HOKA |
| Heel-to-toe drop | 8 mm stated · 12.4 mm measured HOKA · RunRepeat lab |
| Toe box, at the big toe | 73.1 mm RunRepeat lab |
| Widths | Narrow, Medium, Wide, X-Wide (men) HOKA |
| List price | $150 HOKA |
Built to be emptied and refilled
Orthofeet Coral Spec analysis
The second half of the brief is accommodation, and this is the only shoe on the site whose maker makes a company-wide statement about it: Orthofeet says its shoes are built with extra depth and ship with removable orthotic insoles a quarter of an inch thick — 6.35 mm — explicitly so that a custom device can go in. For a rigid foot that ends up in an accommodative orthosis rather than a corrective one, that is the difference between a shoe that takes the device and a shoe that does not. Its published 15.7 mm drop is the second-largest on this site, and it comes in A, B, D and 2E in women’s.
The honest caveat: Orthofeet publishes almost nothing else. No stack heights, no weight, no midsole hardness, no independent laboratory has cut one open. Everything above is the brand’s own statement, and the depth claim is made about the range rather than about this model. It is a shoe chosen on a design intention rather than on a measurement, and we would rather say that than dress it up.
| Published figure | Value |
|---|---|
| Insole | Quarter inch (6.35 mm), removable Orthofeet, company-wide |
| Extra depth | Stated across the range Orthofeet |
| Heel-to-toe drop | 15.7 mm Orthofeet |
| Midsole hardness | Not published by anyone — |
| Stack heights · weight | Not published — |
| Widths | W: A/B/D/2E Orthofeet |
| List price | $119 Orthofeet |
Read the full specification analysis → · How to check a shoe has room for a device →
The one we would not choose for this diagnosis
A motion-control walker, and on this site that means the Brooks Addiction Walker 2. We recommend it elsewhere and we mean it — it is a serious, durable shoe with the most flexible heel counter we hold a grade for and one of the widest fitting ranges available. But it is the shoe a flat-foot diagnosis leads to, it is built to resist the collapse of a mobile arch, and its midsole measured 48.7 Asker C, the firmest figure in our database, on the shortest heel stack of the eight at 35.7 mm. Firm and low is the correct answer for a foot that needs controlling. It is the wrong answer for a joint that has nothing left to control and no ability to absorb.
The same caution applies less sharply to the rest of the stability category, including the ASICS Gel-Kayano 32 at 41.3 AC. The exception is interesting and worth knowing: the Brooks Adrenaline GTS 25 measured 34.5, which is softer than average and 9.6 points softer than the generation before it — a stability shoe that got genuinely soft. If you have been told to stay in a stability shoe for a separate reason, that is the one on this site whose foam is not working against you.
And one thing that is not about a shoe at all. Recurrent ankle sprains with a stiff hindfoot are a pattern worth taking to someone who can image the foot, not a pattern to buy your way out of. Our ankle support page covers what footwear can and cannot do there.
What the research actually supports — and where it stops
There is no trial of footwear for tarsal coalition. There is no trial comparing orthoses to shoes to immobilisation. The literature on this condition is overwhelmingly surgical — resection technique, outcomes, complication rates — and the conservative half is described rather than tested. Everything on this page is therefore mechanical reasoning applied to published specifications, and we would rather say that in a heading than bury it in a footnote.
There is one piece of research that speaks directly to reading a page like this one, and it is uncomfortable in a useful way. A 2022 cross-sectional review assessed the 47 unique websites returned by the three most popular search engines for “tarsal coalition”. Measured against the content of the AAOS patient information on the condition, the average completeness score was 13.1 out of 20, with a range of 4 to 20. Average quality on the DISCERN instrument was 34.2 out of a possible 80. And on readability, only 2 of the 47 sites — 4% — were written at or below the eighth-grade level that is the documented average reading level in the United States.
We are one of those 47 kinds of site, and citing that study does not exempt this page from it. What it does mean is that the right posture for a reader here is the one the study implies: check whether the page tells you where its numbers came from, whether it distinguishes what is measured from what is reasoned, and whether it tells you when to stop reading and go and be examined. On this page: every shoe figure is attributed in the table it appears in, the reasoning is labelled as reasoning, and the answer to the third question is that a stiff, painful hindfoot in a teenager or young adult is an imaging question first.
Questions people ask
Can a shoe or an insole make a coalition go away?
No. A coalition is a physical bridge between two bones. Nothing worn on the outside of the foot removes it, and nothing worn on the outside of the foot restores the motion it prevents. What footwear can do is change how much load reaches a foot that has lost one of its shock absorbers, and whether that foot is held in a position it tolerates. Those are worth having. They are not a cure, and any page that implies otherwise is selling something.
Should I be wearing an arch support?
That depends on which kind, and the distinction is the whole answer. A corrective device is shaped to move a mobile foot towards a better position. An accommodative device is shaped to fit the foot you have and spread load over more of it. A coalition foot is, by definition, not going to be moved — so a device pressed against a stiff arch has to go somewhere, and where it goes is into the skin. Which one you need, and how it is contoured, is a question for whoever has examined the foot. What this page can tell you is that either way the shoe must have the interior room to take it, which is what our orthotic volume rating is for.
Why does the shop keep handing me stability shoes?
Because from the outside a coalition foot frequently looks like a flat foot, and a flat foot is the single most common reason anyone gets handed a stability shoe. That is not the shop being careless — the cohort described above found two fellowship-trained surgeons picking up 26 coalitions that had been missed clinically, 16 of them sitting under a flatfoot diagnosis. If the diagnosis was not obvious to a specialist without a CT scanner, it is not going to be obvious across a shop counter. The useful thing you can do is say the word “coalition” out loud in the shop, because it changes the question from “how flat is this foot” to “how much does it move”.
Is a rocker sole worth looking for?
Mechanically it is a reasonable thing to want — a rocker moves the foot through the step without asking the joints to supply the range — and it is a standard answer for stiff joints elsewhere in the foot. We are not going to give you a list, because nobody publishes a rocker geometry figure: not the apex position, not the rocker angle, not the toe spring. That is another specification that decides how a shoe behaves and never appears on a box. Until someone measures it, “look for a rocker” is advice you can only act on by feel, and we would rather say so than rank shoes on a shape we cannot quantify.
Do I have one in the other foot too?
More likely than not. In the 2022 Scientific Reports cohort of 839 patients imaged bilaterally, 56.5% of coalitions were present in both feet, rising to 76% for talocalcaneal coalitions specifically. The authors’ own conclusion from that is that bilateral imaging is essential for diagnosis — which is a question for the person ordering the scan, and a reason not to assume a quiet foot is a normal one.
Can I still run?
That is a question about your particular coalition, its location and whether the surrounding joints are taking the strain, and it needs someone who has seen the imaging. What the footwear side of it looks like is straightforward: a foot that cannot absorb impact through the subtalar joint is asking the midsole to do more of it, and the midsole property that matters is hardness, which no brand publishes. If you run, the eight-shoe table above is the only hardness data anyone has put in front of you, and it is eight shoes out of everything on the market.
What happens next on this page
Three numbers would let this page name shoes on measurement instead of on reasoning. Midsole hardness for every shoe we hold rather than eight, on a durometer of our own to a stated method — it is the specification this diagnosis depends on and the one the whole industry declines to print. Rocker geometry: apex position as a percentage of shoe length, and the angle, so “look for a rocker” becomes a figure you can compare. And our orthotic volume rating measured rather than described, because a foot that must be accommodated needs a shoe that will take the device. All three are on the bench list. When they exist, this page gets rewritten around them and any shoe that no longer fits comes off, including the popular ones.
- Park JJ, Seok HG, Woo IH, Park CH. Racial differences in prevalence and anatomical distribution of tarsal coalition. Scientific Reports 2022;12(1):21567. doi:10.1038/s41598-022-26049-6 (PMID 36513745). Open access. Source of the 0.03–13% range in previous studies, the 6.0% overall prevalence in 839 bilaterally imaged patients, the 56.5% bilateral occurrence (76.0% for talocalcaneal), and the finding that talocalcaneal coalitions were significantly more often symptomatic than calcaneonavicular ones.
- Jackson TJ, Larson AN, Mathew SE, Milbrandt TA. Incidence of Symptomatic Pediatric Tarsal Coalition in Olmsted County: A Population-Based Study. Journal of Bone and Joint Surgery (American) 2021;103(2):155–161. doi:10.2106/JBJS.20.00707 (PMID 33186000). Source of the 3.5 per 100,000 annual incidence of symptomatic coalition in children and the 10–14 age peak.
- Tarsal Coalition is Not Necessarily Associated with a Flatfoot Deformity: A Cohort of Clinically Misdiagnosed Cases and Alignment Features in 41 Feet. Foot & Ankle Orthopaedics 2022;7(4). Open access. A conference abstract, not a full peer-reviewed paper — source of the 800 weightbearing CT re-read, the 41 coalition feet, the 15 clinically diagnosed against 26 missed, the 16 of those 26 carrying a flatfoot diagnosis, and the 19 valgus / 18 neutral hindfoot split.
- Assessing the Accuracy, Quality, and Readability of Online Patient Resources on Tarsal Coalition. Foot & Ankle Orthopaedics 2022;7(1). Open access. Also a conference abstract. Source of the 47 websites reviewed, the average content score of 13.1 of 20, the average DISCERN score of 34.2, and the finding that only 2 of 47 sites (4%) were written at or below an eighth-grade reading level.
- RunRepeat laboratory measurements of midsole hardness on the Asker C scale, stack heights, torsional rigidity and insole thickness for the eight shoes named in the table above; read September 2026. Each figure is also cited on that shoe’s own page here.
- Brand-published specifications from Brooks, HOKA, ASICS and Orthofeet — stated stack heights and drop, widths, insole removability and depth, and list price; read September 2026.
- Podiatrist Tested shoe spec database — the 43-shoe dataset behind every count on this page, with the publisher of each individual figure.
No shoe on this page has been tested by us, and nothing here is a diagnosis or a treatment recommendation. A tarsal coalition is confirmed on imaging; see our editorial policy.
- Best shoes for flat feet — written for the flexible flat foot, which is the thing this condition is mistaken for.
- Best shoes for overpronation — the motion a coalition foot cannot make, and the shoes built to limit it.
- Best shoes for sinus tarsi syndrome — the same joint complex, irritable rather than fused.
- Best shoes for cuboid syndrome — why a stiff shoe helps a mobile midfoot and not a rigid one.
- Best shoes for heel fat pad atrophy — where the eight-shoe hardness dataset is worked through in full.
- Orthotic volume rating — the one-minute shop test for whether a shoe will take a device.
- Best shoes for ankle support — for the recurrent-sprain half of the story.
- Shoe spec database — every published figure on this site in one table, with who published each one.
- Best shoes for midfoot arthritis — where we recommend the same shoe this page rules out, and why.
Recently reviewed
Individual shoe pages state their evidence tier, published measurements and who should skip them.
HOKA Clifton 11
Spec AnalysisHOKA’s product page carries a podiatric seal claim the APMA database does not support for this version, and a women’s stack height that contradicts HOKA’s own drop. Not tested by us.
Skechers Hands Free Slip-ins
Spec AnalysisUntested. A heel panel engineered to stay open cannot also be a rigid heel counter, and Skechers publishes no stiffness figure for it — nor a drop, a weight or a width.
New Balance Made in USA 990v6
Spec AnalysisNew Balance publishes no weight, drop or stack height for the 990v6, but it does publish B through 6E widths — and that range is why it still matters. Not tested by…
Measured, worn, scored — never sponsored
No brand has ever paid for a review, a score, a ranking or the seal. Where we earn a commission the link says so, and the score does not change.