Brooks Adrenaline GTS 21 Men’s Low-Top Support Marathon Running Shoe — 1104191D102

Brooks Adrenaline GTS 21 Men’s Running Shoe

Style No.: 1104191D102

The Adrenaline GTS 21 is Brooks’ most trusted support trainer — a go-to for runners who want reliable guidance without sacrificing cushion or comfort. GTS stands for Go-To Support, and the 21st iteration delivers exactly that: a nitrogen-infused foam midsole for plush, responsive cushioning paired with GuideRails® holistic support technology that keeps excess movement in check, protecting knees and joints mile after mile. Built for marathon training and long-distance daily runs, the Adrenaline GTS 21 is the shoe that serious runners return to season after season.

Key Features

• Upper: Engineered mesh with 3D Fit Print overlays — lightweight, breathable, and adaptive to foot shape without added bulk
• Support System: GuideRails® holistic support technology — limits excess movement at the heel and guides the foot through a natural gait cycle; protects knees by addressing biomechanical imbalances
• Midsole: Nitrogen-infused DNA LOFT foam — ultra-soft, lightweight cushioning that maintains its shape and responsiveness across high mileage
• Outsole: Segmented crash pad with blown rubber forefoot — smooth heel-to-toe transitions and durable grip on road surfaces
• Fit: Standard (D) width; also available in 2E (wide) and 4E (extra wide)
• Drop: 12mm heel-to-toe offset for a supportive, stable ride
• Gender: Men’s
• Style No.: 1104191D102

Performance Highlights

• GuideRails® support — addresses overpronation holistically without rigid medial posts; keeps the whole body aligned, not just the foot
• Nitrogen-infused DNA LOFT foam — lighter and more resilient than standard EVA; retains cushion integrity over hundreds of miles
• Segmented crash pad outsole — smooth, adaptive transitions from heel strike to toe-off on varied road surfaces
• 3D Fit Print upper — precision-bonded overlays provide structure and support without stitched seams or added weight

Fit & Sizing

• True to size; available in D (standard), 2E (wide), and 4E (extra wide)
• Available in US Men’s sizing — refer to the size chart for EU conversions
• Recommended for mild to moderate overpronators and neutral runners seeking extra support

Care Instructions

• Remove insoles and air dry after each run — avoid direct heat sources
• Machine wash on gentle cycle in a mesh laundry bag; air dry only
• Clean outsole with a damp brush to maintain grip performance

About Brooks Adrenaline GTS

For over two decades, the Adrenaline GTS has been one of the best-selling support running shoes in the world — trusted by everyday runners and marathon athletes alike. The GTS line pioneered the GuideRails® support system, moving beyond traditional motion control to offer a more natural, holistic approach to gait correction. The result is a shoe that supports without restricting — letting runners run their way, protected.