Brooks Glycerin GTS 21: Complete Review & Comparison Guide

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Overview

The Brooks Glycerin GTS 21 combines the plush cushioning of the Glycerin with Brooks' GuideRails support system—creating a premium stability shoe for runners who need guidance without sacrificing softness. The "GTS" stands for "Go-To-Shoe," and for many overpronators, that's exactly what this is.

This is the shoe for runners who love the idea of the Glycerin's soft, premium ride but need stability support. The GuideRails provide light guidance without the heavy, intrusive feel of traditional medial posts.

Key Specifications

Spec	Value
Category	Daily Trainer, Long Run
Cushion Level	High
Heel-to-Toe Drop	10mm
Weight (Men's/Women's)	10.6oz / 9.5oz
Stack Height	38mm heel / 28mm forefoot
Pronation Support	Light Stability
Width Options	Narrow, Standard, Wide
MSRP	MSRP: $160
Surface	Road

What It's Known For

The Glycerin GTS 21's standout feature is its combination of maximum cushioning with subtle stability. The GuideRails system acts as bumpers that only engage when your form breaks down, allowing natural movement while preventing excessive pronation.

The DNA LOFT v3 foam delivers the same plush, soft ride found in the neutral Glycerin—meaning stability runners don't have to sacrifice cushioning comfort. This makes the Glycerin GTS ideal for long runs and high-mileage training.

Why Runners Love It

Pros

• Plush Cushioning: The same soft DNA LOFT v3 foam as the neutral Glycerin.

• Light Stability: GuideRails provide support without feeling intrusive or heavy.

• Premium Upper: Comfortable fit and materials match the neutral version.

• Good for Joint Issues: Helps runners with plantar fasciitis and knee pain.

What Some Runners Don't Like

Cons

• Heavy Construction: At 10.6oz, it's heavier than many daily trainers.

• Premium Price: The MSRP: $160 price point is higher than basic stability options.

Who Should Consider This Shoe

The Brooks Glycerin GTS 21 is ideal for:

• Overpronators who want cushioning and aren't satisfied with firmer stability shoes
• High-mileage runners (20-70 miles per week) who need stability support
• Runners with plantar fasciitis or knee pain related to gait issues
• Long run specialists who need guidance over distance

Who Might Want to Look Elsewhere

Consider other options if you:

• Need more substantial stability support
• Prefer lighter weight shoes
• Want a budget-friendly stability option
• Don't need stability support at all

How It Compares: Cross-Brand Comparison

Shoe	Cushion	Drop	Weight (M)	Price	Best For
Brooks Glycerin GTS 21	High	10mm	10.6oz	MSRP: $160	Cushioned stability
ASICS Gel-Kayano 31	High	10mm	10.9oz	MSRP: $160	Premium stability
Nike Vomero Plus	High	10mm	10.2oz	MSRP: $180	Cushioned stability
Saucony Guide 17	Moderate	8mm	9.5oz	MSRP: $140	Lightweight stability
HOKA Arahi 7	High	5mm	9.6oz	MSRP: $145	Cushioned stability

Brooks Lineup: Same-Brand Comparison

Shoe	Cushion	Drop	Weight (M)	Price	Best For
Brooks Glycerin GTS 21	High	10mm	10.6oz	MSRP: $160	Cushioned stability
Brooks Glycerin 21	High	10mm	10.1oz	MSRP: $160	Cushioned neutral
Brooks Adrenaline GTS 24	Moderate	12mm	10.2oz	MSRP: $140	Daily stability
Brooks Ghost 16	Moderate	12mm	9.9oz	MSRP: $140	Neutral daily
Brooks Ariel/Beast	Maximum	12mm	12.0oz	MSRP: $160	Motion control

Final Verdict

The Brooks Glycerin GTS 21 proves that stability runners don't have to sacrifice cushioning. It delivers the same plush ride as the neutral Glycerin while adding GuideRails support that helps without hindering.

For overpronators who've been disappointed by firmer stability shoes, the Glycerin GTS 21 offers a premium alternative. It's one of the best options for runners who need both maximum cushioning and stability guidance.

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As an Amazon Associate, we earn from qualifying purchases.

Check your local running store or online retailers for availability.