Step 02 — The lineup

Matched to
Brooks Glycerin GTS 21

6 shoes scored across eleven metrics · Any purpose

6 matched, side by side

Click any shoe for sizing & durability
The match
Weight
Drop
Stack
Plate
Pace
Price

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Sizing note

Everything here fits true to size. Leave a thumbnail of space at the toe.

Durability

Expect roughly 500 miles before the midsole flattens out.

Step 03 — Every metric

The full comparison

MetricBrooks Glycerin GTS 21Brooks Glycerin GTS 23Nike Structure 26(2024)Asics GT-4000 4Brooks Adrenaline GTS 25(2025)Asics Gel-Kayano 31(2024)Asics Gel-Kayano 32(2025)
Weight303 g / 10.7 oz295 g / 10.4 oz298 g / 10.5 oz310 g / 10.9 oz300 g / 10.6 oz311 g / 11.0 oz304 g / 10.7 oz
Drop10 mm10 mm10 mm10 mm10 mm10 mm8 mm
Stack (heel)39 mm42 mm38 mm36 mm37 mm40 mm40 mm
Cushioning
Flexibility
Stability (5 = most guidance)
Rocker geometry
Energy return
Responsiveness
Toe-boxStandardStandardStandardStandardStandardStandardStandard
Plate———————
Intended pace8:30–11:30 /mi8:30–11:30 /mi8:30–11:30 /mi9:00–12:30 /mi8:30–11:30 /mi9:00–12:00 /mi9:00–12:00 /mi
PurposeDaily, Long run, RecoveryDaily, Long run, RecoveryDaily, Long runDaily, Long runDaily, Long runDaily, Long run, RecoveryDaily, Long run, Recovery
SizingTrue to sizeTrue to sizeTrue to sizeTrue to sizeTrue to sizeTrue to sizeTrue to size
Durability~500 mi~500 mi~500 mi~500 mi~500 mi~500 mi~500 mi
Price$155$175$140$140$145$165$180

Your reference shoe is shown first for context. Cushioning, flexibility and stability are rated 1–5, where 5 stability means the most guidance and 1 means fully neutral.