best shoe in 44 years distance running.
tim · Jul 2, 2023
5/5
Overall
The 19s and 20s were amazing, feel faster maybe, these bring back the structure a fair bit.Both amazing shoes.
- Comfort
- 5/5
- Cushioning
- 5/5
- Durability
- 5/5
- Appearance
- 4/5
- Value
- 5/5
adidas
UltraBOOST 21
Daily trainer
· Neutral
· Road
Good
(76/100)
- Weight
- 12 oz
- Release
- 2021 Q1
- MSRP
- $190
Good
(76/100)
overall
Shoe details
- Weight
- 12 oz
- Release
- 2021 Q1
- MSRP
- $190
Ratings & Reviews
Good (76/100)
Based on product-line history, external ratings, and runner reviews.
?
Scores better than 50% of all shoes.
Our ratings use detailed reviews from knowledgeable runners, ratings for shoes in the same product line, and reliable product information from trusted retailers.
Rating breakdown
Better Shoes Rating. Shading shows the expected rating range.
?
Rankings combine runner ratings, whether reviewers say they'd buy a shoe again, direct comparisons to other shoes, related product-line performance, and trusted external ratings.
The darker band shows the central rating range. The lighter band shows a wider range of reasonable outcomes. More reviews for this shoe usually narrow both bands.
Overall
Good (76/100)
Overall rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Good (76/100)
Compared To Other Shoes
Scores better than 50% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
Durability
Exceptional (96/100)
Durability rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Exceptional (96/100)
Compared To Other Shoes
Scores better than 94% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
Cushioning
Excellent (92/100)
Cushioning rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Excellent (92/100)
Compared To Other Shoes
Scores better than 89% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
Comfort
Very good (84/100)
Comfort rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Very good (84/100)
Compared To Other Shoes
Scores better than 74% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
Appearance
Very good (85/100)
Appearance rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Very good (85/100)
Compared To Other Shoes
Scores better than 69% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
Value
Average (64/100)
Value rating
We estimate how this shoe ranks by combining runner ratings, whether reviewers say they'd buy a shoe again, and direct comparisons to other shoes they've run in. We also consider related product-line performance and trusted external ratings. More review data helps narrow the likely rating range.
Better Shoes Rating
Average (64/100)
Compared To Other Shoes
Scores better than 17% of shoes
Compared with all shoes
The shaded band shows the rating range we think is most likely.
0%
0/3
Prefer this shoe over another.
Reviewers said this shoe was better than another shoe they ran in.
Comparison set
Rating
All Running Shoes
Scores better than 50% of 2,617 running shoes.
Good
Daily Trainers
Scores better than 51% of 1,872 daily trainers.
51%
adidas
Scores better than 65% of 202 adidas shoes.
65%
Compared to other shoes
See how this shoe compares to others like it.
Current shoe
Reference shoe
Lightest
Newest
/
Best overall
/
Best comfort
Shoe properties
Type
Daily trainer
Daily trainer
Daily trainer
Pronation
Neutral
Neutral
Neutral
Weight
12 oz M
1 oz M
Lightest
—
Stack
—
—
—
Drop
—
—
7mm
Release
2021 Q1
2021 Q4
2024 Q2
Newest
MSRP
$190
$190
$200
Best price
—
—
$149.99
Ratings
Overall
Average (50%)
Very good (85%)
Exceptional (>99%)
Best overall
Comfort
Good (74%)
Excellent (90%)
Exceptional (99%)
Best comfort
Cushioning
Very good (89%)
Excellent (93%)
Exceptional (99%)
Best cushioning
Durability
Excellent (94%)
Excellent (97%)
Exceptional (99%)
Best durability
Appearance
Above average (69%)
Excellent (96%)
Exceptional (98%)
Best appearance
Value
Bottom tier (17%)
Average (48%)
Very good (86%)
Best value
Where to buy
No offers available
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Reader Ratings
4 reader ratings
Showing 1–1 of 1 written review