Glycerin 21
Glycerin 21 is a neutral max-cushion shoe for daily road miles, long runs and walking. It adds 2mm more nitrogen-infused DNA LOFT v3 than the Glycerin 20 while keeping a 10mm offset. A broad platform supports smooth, stable transitions, and a new warp-knit upper balances breathability with a flexible, secure fit. It is the first Glycerin to use lightweight RoadTack rubber with recycled silica.
- Intended uses:
- Daily, Long run
Specs
- Weight
- 278g
- Of 948 known values: 503 lower, 8 equal, 437 higher. The marker uses the midpoint of equal values.
- Standard53.5th percentile (tie midpoint) / average +10g
- Drop
- 10mm
- Of 961 known values: 786 lower, 126 equal, 49 higher. The marker uses the midpoint of equal values.
- higherUpper 18.2%, including ties / average +3.2mm
- Stack (heel/forefoot)
- -
- Not registered
- Carbon plate
- No
- 83% of 866 known models have no carbon plates
- Midsole
- DNA LOFT v3
- Outsole
- RoadTack rubber
- Reference price
- $160
- US price
Weight measurement and plate details
- Weight note
- Official Brooks product page lists 277.8g for men; Japanese launch coverage states approx. 280g at 27.0cm.
- Plate note
- Brooks' exact product page describes the DNA LOFT v3 midsole, broad platform and engineered warp-knit upper, while its official comparison identifies the RoadTack rubber outsole. No carbon structure is identified, and Fleet Feet's exact product page corroborates the same major construction, supporting a false carbon-plate classification.
Prices and release dates by market
2 markets are registered. Values are shown as published for each market: no currency conversion and no guessed days or months. Reference prices are not current shop prices.
| Market | Reference price | Release |
|---|---|---|
| United StatesUS | $160Shown above | Not registered |
| JapanJP | ¥25,300 | 2024-01Shown above |
Changes from the previous model
A comparison with the registered values for Brooks Glycerin 20.
In the registered data, weight is 8g lighter at 278g.
These are differences between registered values, not a controlled comparison at the same size and measurement conditions. See the notes below the specs for weight conditions.
Compare within the database
See where these specs sit in the overall distribution. You can also compare within the same category.
Spec distributions
There is not enough data to show the scatter plot for this comparison.
Weight
This shoe 278gregistered average 268g (948 shoes)
Drop
This shoe 10mmregistered average 6.8mm (961 shoes)
Items with missing numeric values are excluded. Sample sizes and measurement conditions vary between models; this distribution is not a performance ranking.