The Brooks Glycerin line has become a benchmark for runners seeking premium cushioning and maximum comfort.

But today, Brooks offers several versions in this line:

• Glycerin 23

• Glycerin 23 GTS

• Glycerin Max 2

• Glycerin Flex

Each model has a different philosophy: classic comfort, stability, maximum cushioning, or natural stride.

So, which Brooks Glycerin should you choose based on your runner profile? Here's our complete guide.

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Brooks Glycerin 23: the versatile comfort shoe

The Brooks Glycerin 23 is the classic and most versatile version in the line.

It is designed for runners looking for a comfortable and reliable shoe for daily training. Its cushioning is based on DNA Tuned foam, which offers effective shock absorption while maintaining good stability.

Main features

• Cushioning: DNA Tuned

• Drop: 8 mm

• Stack: 38 mm heel / 30 mm forefoot

• Weight: approximately 300 g

For whom?

The Glycerin 23 is ideal for:

• runners with a neutral stride

• daily runs

• long runs

• marathon training

It's a comfortable shoe that prioritizes protection and durability over pure performance.

👉 Ideal profile: runner looking for a versatile shoe to log miles.

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Brooks Glycerin 23 GTS: the stability version

The Glycerin 23 GTS uses the same base as the Glycerin 23 but adds GuideRails technology.

This system acts as a guide rail for the foot to limit excessive knee or ankle movement during the stride.

Unlike older stability shoes, assistance only kicks in when the foot moves out of its natural alignment, which avoids overly rigid sensations.

For whom?

The Glycerin GTS 23 is ideal for:

• pronating runners

• runners looking for more stability

• runners prone to knee or ankle pain

👉 Ideal profile: runner needing a bit of support without sacrificing the comfort of the Glycerin.

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Brooks Glycerin Max 2: maximum cushioning

The Glycerin Max 2 is the most cushioned version in the line.

It stands out with a very thick sole (up to approx. 45 mm) which offers an exceptional level of protection for the legs.

Its geometry also promotes a fluid transition and an assisted forward stride.

For whom?

The Glycerin Max 2 is perfect for:

• long runs

• marathon training

• runners seeking maximum cushioning

• runners who want to protect their joints

👉 Ideal profile: runner who prioritizes comfort and maximum protection.

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Brooks Glycerin Flex: the new, more natural approach

The Glycerin Flex is Brooks' latest innovation in the line.

Contrary to the trend of very rigid or very thick shoes, it focuses on flexibility and freedom of movement.

It has a segmented sole allowing different areas of the foot to move independently, offering a more natural running sensation.

Main features

• Drop: 6 mm

• Stack: approx. 36 mm heel

• Flexible sole with central cutout

For whom?

The Glycerin Flex will suit runners who:

• like flexible shoes

• want a more natural feel

• prioritize foot mobility

👉 Ideal profile: runner seeking a natural and flexible stride.

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Quick comparison table

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Which Brooks Glycerin to choose?

Here's a quick guide:

• You want a comfortable and versatile shoe → Glycerin 23

• You need stability → Glycerin 23 GTS

• You want maximum cushioning → Glycerin Max 2

• You prefer a natural and flexible stride → Glycerin Flex

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Our advice at Triathlon Store

The Brooks Glycerin line now covers almost all runners' needs.

If you had to remember one key point:

• Glycerin 23: versatility

• Glycerin GTS 23: stability

• Glycerin Max 2: maximum protection

• Glycerin Flex: flexibility and natural feel

The choice therefore mainly depends on your stride and your running style.

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Frequently asked questions about the Brooks Glycerin range

What's the difference between Brooks Glycerin 23 and Glycerin 23 GTS?

The Glycerin 23 is a versatile neutral shoe. The GTS adds GuideRails technology to stabilize the stride of pronating runners without stiffening the shoe.

Is the Brooks Glycerin Max 2 suitable for triathlon?

Yes, its maximum cushioning (45mm) makes it an excellent shoe for the running leg of an Ironman or a 70.3, especially to protect already fatigued legs.

Which Brooks Glycerin for a marathon?

The Glycerin Max 2 for maximum long-distance comfort, or the Glycerin 23 for a good balance between cushioning and responsiveness.

Is the Brooks Glycerin Flex suitable for beginners?

It suits runners who want a natural stride, but it's not the most suitable for beginners who often need more support. The Glycerin 23 remains more versatile for starting out.