Running shoes · owner-verdict comparison

Adidas Adizero Boston 12 vs Adidas Ultraboost 5: what real owners say

Real owners lean toward the Adidas Adizero Boston 12: 56% of 230 owners recommend it, vs 35% of 34 for the Adidas Ultraboost 5.

Verdicts aggregated from Reddit, enthusiast forums, and YouTube owner comments — affiliate reviews excluded. Sample sizes differ; judge accordingly. How we score

Adidas Adizero Boston 12

56%of 230 owners recommend
56% recommend · 14% neutral · 30% don't
Owners praise
  • Excels at tempo and speed work
  • Extremely durable, high mileage
  • Firm, stable, responsive ride
Owners complain about
  • Stiff, unforgiving upper
  • Laces won't stay tied
  • Narrow forefoot causes blisters
Full owner report →

Adidas Ultraboost 5

35%of 34 owners recommend
35% recommend · 21% neutral · 44% don't
Full owner report →

What Adidas Adizero Boston 12 owners say

“la recomiendo ampliamente”
— @King_Therion on YouTube
“ya puedo decir que disfruto con la 12”
— @juanluiscalvo6838 on YouTube
“Adidas parece que sigue sin darse cuenta de las grandes mejoras y evoluciones que el resto de marcas hace”
— @davidbelmonte2305 on YouTube

What Adidas Ultraboost 5 owners say

“Say what you want about the design, these are insanely comfortable shoes. IMO look better in person.”
— ridukosennin on Reddit
“I have Allbirds and UB 3.0s and I can say definitively my UBs are far more comfortable for me. It’s a treat to wear them haha”
— SunriseMoon on Reddit
“Anyone have the issue of the footbed moving around in their Ultraboost 19s? It makes mine nearly unwearable. (It slides back constantly. No matter how tight or loose they are.)”
— Easy-Lucky-Free on Reddit