MEN'S GLYCERIN GTS 21

When comparing the Brooks Glycerin GTS 21 to the Glycerin GTS 20, there are a few key updates and differences that reflect Brooks' efforts to enhance comfort, support, and overall performance. Here’s a detailed comparison between the two models:

Cushioning and Midsole

• Glycerin GTS 20: The Glycerin GTS 20 featured DNA LOFT cushioning throughout the midsole, providing a plush and comfortable ride. The cushioning in the GTS 20 was soft and designed to absorb impact well, making it a great choice for long-distance runners who needed both cushioning and support. It delivered a smooth ride, although it leaned slightly more towards comfort than responsiveness.

• Glycerin GTS 21: The GTS 21 continues with DNA LOFT cushioning but uses an updated version, known as DNA LOFT v2. This iteration is slightly lighter and more responsive while maintaining the soft, luxurious feel that the Glycerin line is known for. The GTS 21 offers a smoother, more cushioned experience with improved shock absorption and a softer overall ride compared to the GTS 20. This update makes the GTS 21 feel a bit more agile while still providing excellent cushioning for long runs.

Stability and Support

• Glycerin GTS 20: The GTS 20 incorporated Brooks’ GuideRails® support system, which provided holistic support to keep the runner’s stride aligned. The GuideRails® system in the GTS 20 was effective at managing excess movement and was especially beneficial for runners who overpronate. The support was noticeable but not intrusive, allowing for a stable and controlled running experience.

• Glycerin GTS 21: The GuideRails® system remains in the GTS 21, offering the same level of stability and support as in the GTS 20. However, the system in the GTS 21 has been slightly refined to work more seamlessly with the updated midsole and upper. The support feels more integrated, offering a smoother and more natural running experience while still providing the necessary stability for overpronators. This refinement makes the GTS 21 feel less bulky while maintaining the same level of support.

Upper Design and Fit

• Glycerin GTS 20: The upper of the GTS 20 was made of an engineered mesh that provided a secure and comfortable fit. It was breathable and adaptable, with enough structure to keep the foot well-supported. The 3D Fit Print technology in the upper helped to offer a snug fit, but some runners found the fit to be slightly too tight in certain areas, particularly in the midfoot.

• Glycerin GTS 21: The GTS 21 features an updated engineered mesh upper that enhances breathability and support. The fit in the GTS 21 is slightly more refined, offering a better balance between snugness and comfort. The upper in the GTS 21 is more adaptive, accommodating a wider range of foot shapes and providing a more personalized fit. The internal bootie construction and 3D Fit Print technology remain, but with tweaks that make the upper feel more comfortable and secure, especially over longer distances.

Ride and Performance

• Glycerin GTS 20: The ride of the GTS 20 was smooth and cushioned, making it ideal for long runs and daily training. The shoe offered consistent performance, with enough cushioning to protect the joints and reduce fatigue. However, the ride leaned more towards a plush, comfortable feel, which some runners found to be a bit too soft for faster-paced runs.

• Glycerin GTS 21: The GTS 21 offers a slightly more refined ride, with the DNA LOFT v2 cushioning providing a softer and more responsive experience. The shoe remains smooth and stable, but the updated cushioning makes the GTS 21 feel a bit more versatile, capable of handling a broader range of paces. The improved cushioning and fit make the GTS 21 more comfortable for longer runs and recovery days, while still offering enough responsiveness for moderate-paced runs.

Outsole and Durability

• Glycerin GTS 20: The outsole of the GTS 20 was durable, with rubber placed strategically to enhance traction and extend the shoe’s lifespan. The tread pattern offered good grip on various surfaces, making the GTS 20 reliable for road running and light trails. The durability of the GTS 20 was generally excellent, holding up well over many miles.

• Glycerin GTS 21: The outsole in the GTS 21 is similar to the GTS 20 but with slight improvements in rubber placement and tread design. These updates provide better grip and enhance the overall flexibility of the shoe. The durability remains strong, with the GTS 21 capable of handling high mileage without significant wear. The refined outsole contributes to a smoother ride, especially during transitions from heel to toe.

Weight

• Glycerin GTS 20: The GTS 20 was relatively lightweight for a stability shoe with such plush cushioning, making it versatile for various types of runs.

• Glycerin GTS 21: The GTS 21 is slightly lighter than the GTS 20, thanks to the updated DNA LOFT v2 cushioning and refined upper. This reduction in weight enhances the shoe’s overall responsiveness and makes it feel more agile, particularly on longer runs.

Aesthetics and Style

• Glycerin GTS 20: The GTS 20 had a sleek and modern design with a range of color options. The aesthetic was clean and appealing, with a focus on function.

• Glycerin GTS 21: The GTS 21 continues with a similar aesthetic but offers a more streamlined and polished look. The colorways are vibrant and contemporary, giving the shoe a fresh appearance that reflects its refined performance.

Summary:

The Brooks Glycerin GTS 21 builds on the strengths of the GTS 20 with several key updates that enhance comfort, fit, and overall ride quality.

• Choose the GTS 20 if you’re satisfied with a plush, supportive shoe and prefer the feel of a slightly firmer ride.
• Opt for the GTS 21 if you’re looking for a softer, more responsive ride with improved fit and a slightly lighter feel.

Both models offer excellent cushioning and support, but the GTS 21 provides a more refined and comfortable running experience, making it a worthwhile upgrade for many runners.