Which is lighter, the Brooks Glycerin 19 or the Glycerin 20?

The Brooks Glycerin 19, by 0.3 oz in a men's US 9 (10.2 oz vs 10.5 oz).

Did the price change between the Brooks Glycerin 19 and the Glycerin 20?

Yes. List price went up $10, from $150 to $160. Street prices differ: the older shoe usually sells under list once its successor ships.

Do the Brooks Glycerin 19 and Glycerin 20 come in the same widths?

Yes. Both run in D, 2E for men's sizes, so a width that fit in the Glycerin 19 carries over to the Glycerin 20.

How do the stack heights compare?

31 mm heel and 21 mm forefoot on the Brooks Glycerin 19, against 34 mm and 24 mm on the Glycerin 20. That is 3 mm more under the heel and 3 mm more under the forefoot. See the stack height note in the table above: the published figures changed convention mid-lineage.

Is the Glycerin 20 still the newest Glycerin?

No. The Glycerin 21 replaced it in 2023, so the Glycerin 20 now sells as an older model and usually below its $160 list price.

Brooks Glycerin 19 vs Glycerin 20

Updated August 3, 2026. Specs are men's US 9.

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THE SHORT ANSWER

Whichever your size still exists in. The Glycerin 19 is discontinued at retail, so remaining pairs sell against a thinning size run, while the Glycerin 20 has a full one. The Glycerin 19 also lists $10 lower.

Brooks Glycerin 19Sizes running outMen's at Amazon Women's
Brooks Glycerin 20Sizes running outMen's at Amazon Women's

Availability last checked Aug 3, 2026. Prices and stock change without notice.

Glycerin 19 · 2021

Glycerin 20 · 2022

Every spec, side by side

Spec	Glycerin 19	Glycerin 20
FIT AND WEIGHT
Weight	10.2 oz	10.5 oz
	The stored figure is RunRepeat's scale. Brooks claimed 10.1 oz and called it the lightest Glycerin to date; no independent scale agreed.
Widths	D, 2E	D, 2E
Upper	Engineered mesh	Engineered mesh (StealthFit knit variant also offered)
	The 20 launched in standard, GTS, and new knit StealthFit variants of both. The StealthFit ran about half an ounce lighter.
CUSHIONING GEOMETRY
Heel stack	31 mm	34 mm
	Handle with care: Brooks never published stack figures for the 18 or 19, so the from-side is an unverified catalog number. What is certain is that the 20 sits taller and wider than any Glycerin before it.
Forefoot stack	21 mm	24 mm
Drop	10 mm	10 mm
MATERIALS
Midsole	DNA Loft, softer density	Nitrogen-infused DNA Loft v3
	The re-platform. Reviewers said the new foam has a lot more energy and does not feel as dead as the 19 did. This is where the modern Glycerin starts.
VALUE
List price at launch	$150	$160

Weighing whether to switch at all, rather than which of these two to buy? What replaced the Brooks Glycerin 19 covers the verdict on the update, what loyalists made of it, and the closest alternatives from other brands.

Buy the Glycerin 19

Sizes running out

Discontinued at retail. Amazon carries what remains, so treat an in-stock size as a closing window, and expect prices to swing.

Men's: Check remaining stock Women's: Check remaining stock

Availability last checked Aug 3, 2026.

Buy the Glycerin 20

Sizes running out

Discontinued at retail. Amazon carries what remains, so treat an in-stock size as a closing window, and expect prices to swing.

Men's: Check remaining stock Women's: Check remaining stock

Availability last checked Aug 3, 2026.

Questions runners ask

Which is lighter, the Brooks Glycerin 19 or the Glycerin 20?: The Brooks Glycerin 19, by 0.3 oz in a men's US 9 (10.2 oz vs 10.5 oz).
Did the price change between the Brooks Glycerin 19 and the Glycerin 20?: Yes. List price went up $10, from $150 to $160. Street prices differ: the older shoe usually sells under list once its successor ships.
Do the Brooks Glycerin 19 and Glycerin 20 come in the same widths?: Yes. Both run in D, 2E for men's sizes, so a width that fit in the Glycerin 19 carries over to the Glycerin 20.
How do the stack heights compare?: 31 mm heel and 21 mm forefoot on the Brooks Glycerin 19, against 34 mm and 24 mm on the Glycerin 20. That is 3 mm more under the heel and 3 mm more under the forefoot. See the stack height note in the table above: the published figures changed convention mid-lineage.
Is the Glycerin 20 still the newest Glycerin?: No. The Glycerin 21 replaced it in 2023, so the Glycerin 20 now sells as an older model and usually below its $160 list price.