The Adidas Ultraboost 21 Review & Lab Test: Shop Men’S & Women’S Models of 2026

The Adidas Ultraboost 21 is a versatile running shoe that offers notable durability and comfort. It is particularly suitable for runners seeking a stable and cushioned experience on urban surfaces.

Lab tests show that the shoe excels in absorbing impact, effectively handling extensive mileage during wear tests. Its construction provides a secure fit, translating to a reliable performance over long distances.

While it may not be the lightest option available, its design focuses on delivering a responsive feel, making it an ideal choice for those looking for a balance between comfort and support.


Pros

  • Sock-like fit
  • Fantastic peppy ride
  • Really durable
  • Heel stays put
  • Great midfoot lockdown
  • Good grip
  • Stretchy upper for wide feet
  • Fun daily trainer

Cons

  • Loose on sharp turns & faster runs
  • Sweaty on hot summer days
  • Heavy

Key Features

  • BOOST midsole for excellent energy return
  • GORE-TEX textile upper to ensure waterproof protection
  • Regular fit for a comfortable wear
  • Suitable for various levels of athletes, from professionals to casual runners
  • Continental WinterGrip Rubber outsole for enhanced traction on snow-covered surfaces

Specifications

  • Sole material: Rubber
  • Outer material: Cotton
  • Closure type: Lace-Up
  • Rating: 4.2 out of 5 based on 102 reviews

Adidas Ultraboost 21 Review & Lab Test: Shop Men’S & Women’S Models – Price, Ratings, Reviews & Sales Insights

Adidas Ultraboost 21 Adidas Ultraboost 5 Adidas Ultrabounce Adidas Racer TR21
Price $180 $180 $80 $75
Pace Daily running Daily running Daily running Daily running
Arch support Neutral Neutral Neutral Neutral
Weight lab Weight brand 12.5 oz / 355g 10.3 oz / 292g 11.5 oz / 326g 11.2 oz / 318g
Drop lab Drop brand 12.1 mm 10.6 mm 11.3 mm 12.9 mm
Strike pattern Heel Heel Heel Heel
Size True to size True to size True to size True to size
Midsole softness - Soft Balanced Balanced
Difference in midsole softness in cold - Small Normal Normal
Toebox durability - Decent Decent Bad
Heel padding durability - Good Decent Bad
Outsole durability - Good Decent Decent
Breathability - Breathable Breathable Moderate
Width / fit Medium Wide Medium Medium
Toebox width - Wide Medium Medium
Stiffness - Stiff Moderate Moderate
Torsional rigidity Moderate Stiff Moderate Moderate
Heel counter stiffness - Moderate Flexible Flexible
Heel lab Heel brand 32.8 mm 35.2 mm 30.3 mm 31.9 mm
Forefoot lab Forefoot brand 20.7 mm 24.6 mm 19.0 mm 19.0 mm
Widths available Normal Narrow Normal Normal
Orthotic friendly
Season - Summer Summer All seasons
Removable insole
Ranking Top 27% Top 14% Bottom 23% Bottom 36%
Popularity Bottom 28% Top 47% Bottom 44% Bottom 14%