Reddit · r/RunningShoeGeeks · Oct 11, 2026 · summarized
PositiveNearly 950 km of training and racing in the Boston 12: 9/10, with durability beyond expectations. Despite a narrow toe box and wear around the big toe, they'd buy it again.
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adidas Adizero Boston 12 Reviews
Firm, very durable and grippy for tempo days; the main complaint is heel slip and poor lockdown.
How the signal works
The signal score
A score out of 100 for how well reviewed a product is next to others of its kind. It rises with positive reviews and with how many there are; negative and mixed reviews take points off. The best in each category scores in the 90s.
So a handful of glowing reviews can’t beat a product lots of people like. No sponsored placements.
What people mention
Often liked
Common concerns
Real runner experiences (172)
Add your reviewShowing 6 reviews mentioning narrow fit Show all
Reddit · r/RunningShoeGeeks · Sep 3, 2025 · summarized
NegativeHated the Boston 12's upper and narrow midfoot; after 200 km and a lot of Achilles pain they gave up on it.
Reddit · r/RunningShoeGeeks · Jun 6, 2025 · summarized
MixedFound the Boston 12 long and snug: their usual US 9.5 was too tight and almost too long.
Reddit · r/RunningShoeGeeks · Mar 13, 2024 · summarized
MixedAfter 400 km, a love-hate-love relationship: the Boston 12 is great for longer speedwork and very durable, but easy to overtighten, too narrow for some, and less comfortable than most. 7.5/10.
Reddit · r/RunningShoeGeeks · Nov 2, 2023 · summarized
NegativeSurprised how tight the Boston 12's toe box is: a 10.5, their size in every other brand, feels super tight.
YouTube · Ben Is Running · Jul 21, 2023 · summarized
PositiveAbout 100 km in two weeks, covering recovery, easy and long runs, track kilometre repeats and a 20 km run on buffed-out trails. They found it very comfortable at easy paces and very responsive when speeding up, with a grippy outsole and little wear. They disliked the cheap laces that came undone, a slippery insole under the big toe and the lack of protection past about 20 km. The mid and heel fit is narrow, which they liked.
Common questions about adidas Adizero Boston 12
What do runners say about adidas Adizero Boston 12?
Most runners find the Boston 12 firm and very durable, with a grippy outsole that lasts many hundreds of kilometres. It suits tempo and faster running better than easy days, and many need a break-in period. The main complaint is heel slip and poor lockdown from the upper and laces.
Is adidas Adizero Boston 12 worth it?
Of the 172 reviews with a clear verdict, 64% are positive, 14% mixed and 22% negative. The praise mentioned most is fast. The most common complaint is heel slip.
What are the most common complaints about adidas Adizero Boston 12?
The complaints reviewers mention most: heel slip (5 reviews), narrow fit (3 reviews) and blisters (2 reviews). For example: A 190 lb runner no longer likes the Boston 12: poor lockdown, firm deadness, and a calf strain in them.
Where do these adidas Adizero Boston 12 reviews come from?
We collected and summarized 172 experiences shared on Reddit, YouTube and blogs, with links to the original sources. Reviews submitted here are checked for spam before they appear. Every review, submitted here or collected, is read as positive, mixed or negative.
More tempo
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