Running shoes · owner-verdict comparison

Adidas Adizero Boston 12 vs Saucony Endorphin Speed 5: what real owners say

Real owners lean toward the Saucony Endorphin Speed 5: 62% of 60 owners recommend it, vs 56% of 230 for the Adidas Adizero Boston 12.

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 →

Saucony Endorphin Speed 5

62%of 60 owners recommend
62% recommend · 13% neutral · 25% don't
Owners praise
  • More stable and planted than past versions and rivals like the Evo SL
  • Versatile do-everything trainer that handles tempo, speed work, and longer runs
  • Improved fit with roomier toe box and more secure upper than the 4
Owners complain about
  • Firmer, more muted ride that lost some of the bounce and punch of earlier Speeds
  • Outsole and midsole wear early, going flat by roughly 230-350 km
  • Happiest at shorter, faster efforts; feet ache past the half marathon
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 Saucony Endorphin Speed 5 owners say

“find it good for pretty much everything”
— @TimGrose on YouTube
“More pep, more bounce, more comfort, very pleasant overall”
— @destrucciondeldiablo on YouTube
“I wanted so badly to love the ES4 but the toe box taper made it unbearable just crushing my pinky toe.”
— @nate_collins on YouTube