Brooks Glycerin 15 vs. ASICS GEL-Nimbus 20 review

Brooks Glycerin 15 is a premium cushioning shoe that offers a plush and soft running experience. ASICS GEL-Nimbus 20 delivers a soft but responsive ride to neutral runners...

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The Brooks Glycerin 15 and the ASICS GEL-Nimbus 20 are neutral cushioning running shoes that can be worn by neutral runners who do not need much stability and support.


The uppers of the Brooks Glycerin 15 The preceding link takes you to and the ASICS GEL-Nimbus 20 differ quite a bit.

While both come with 3D-printed overlays, the overlays on the ASICS GEL-Nimbus 20 The preceding link takes you to are more discrete and look like stitches throughout the upper, while those on the Brooks Glycerin 15 cover more of the upper and run across the midfoot as well as along the length of the upper.

The ASICS logo provides some degree of support on the lateral side of the ASICS GEL-Nimbus 20, but most of the support in the upper comes from engineered mesh and those discrete overlays.

Because the mesh of the ASICS GEL-Nimbus 20 tightens and loosens in areas to move with your foot, you would get a close-to-foot fit from it.

The Brooks Glycerin 15 also provides a good fit thanks to the overlays that run parallel to the midsole.

In addition to no-sew overlays, the Brooks Glycerin 15 also comes with durable stitched-on overlays at the back and at the front of the running shoe.

While the ASICS GEL-Nimbus 20 does not have a stitched-on toecap, it does come with a sturdy and durable external heel counter at the back for additional support.

All in all, you should be able to get a comfortable and somewhat snug fit from either running shoe, but the ASICS GEL-Nimbus 20 might provide a bit more support at the back, while the Brooks Glycerin provides durable support at the front.

Both the ASICS GEL-Nimbus 20 and the Brooks Glycerin 15 are meant to deliver soft rides to runners.

The ASICS GEL-Nimbus 20 does this through the use of two layers of foam in its midsole combined with GEL cushioning between these two layers.

The bottom layer is more responsive than the softer top layer so that you can still feel like you are going fast.

The Brooks Glycerin 15 provides cushioning through one main layer of foam that is well segmented and that provides full ground contact for stability and smoother heel-to-toe transitions.

The type of midsole material used by the Brooks Glycerin 15 delivers 20% more cushioning than Brooks' standard midsole material, which is why the Brooks Glycerin 15 tends to deliver lots of cushioning in both the heel and the forefoot.


According to running shoe lab tests, both the ASICS GEL-Nimbus 20 and the Brooks Glycerin 15 deliver an above average amount of forefoot cushioning, but the forefoot of the Brooks Glycerin 15 is just a tad softer than that of the ASICS GEL-Nimbus 20 for both men and women.

The same thing can be said of the amount of heel cushioning delivered by the two running shoes, but in this case, the amount of heel cushioning is almost the same in the two running shoes for women due to the fact that women get an extra 3 mm of height under the heel of the ASICS GEL-Nimbus 20.

The conclusion is that the Brooks Glycerin 15 delivers a bit more cushioning than the ASICS GEL-Nimbus 20 to both men and women, and the amount comes close to the max.

The ASICS GEL-Nimbus 20 also delivers a soft ride but less so compared to the Brooks Glycerin 15.

Neither the ASICS GEL-Nimbus 20 nor the Brooks Glycerin 15 is meant to provide stability and support, but they are still considered to be pretty stable running shoes.

The ASICS GEL-Nimbus 20 comes with a midfoot shank that consists of two pieces that are not connected under the midfoot but that still provide midfoot integrity and support, while the Brooks Glycerin 15 does not have a midfoot shank but rather provides a good amount of ground contact under the midfoot.

The rubber outsoles of the two running shoes differ somewhat, with the ASICS GEL-Nimbus 20 having larger areas of rubber than the Brooks Glycerin 15.

The outsole of the Brooks Glycerin 15 is more separated and has more flex grooves in the forefoot.

However, it misses the vertical flex groove that comes with the ASICS GEL-Nimbus 20 and that is meant to help with gait efficiency.

According to running shoe lab test results, the ASICS GEL-Nimbus 20 is stiffer than the Brooks Glycerin 15, although the difference in flexibility between the two running shoes is greater for women than it is for men.

The Brooks Glycerin 15 is somewhat flexible for women and somewhat stiff for men.

The women's version of the Brooks Glycerin 15 weighs approximately 8.8 oz (249 grams), and the ASICS GEL-Nimbus 20 for women also weighs about 8.8 oz (249 grams).

The men's versions of the shoes weigh about 10.7 oz (303 grams).

If you are a neutral runner who is looking for a soft ride from a running shoe, you could choose either the Brooks Glycerin 15 or the ASICS GEL-Nimbus 20, thereby keeping in mind that the Brooks Glycerin 15 delivers a somewhat softer ride than the ASICS GEL-Nimbus 20 and that the ASICS GEL-Nimbus 20 might be a bit more responsive than the Brooks Glycerin 15.

There aren't big differences to be noted between the two running shoes, other than in the construction of the upper and in the flexibility of the women's version of the running shoes.

Note: The weight of a running shoe depends on the size of the running shoe, so any weights mentioned in this review may differ from the weight of the running shoe you choose to wear. Running shoes of the same size were compared for this review.

The two links above will take you to where you can read more about the running shoes.

Disclaimer: This running shoe review on is based on personal research and analysis of data that has been made publicly available by running shoe manufacturers and other companies that are dedicated to serving runners, and is not claimed to be accurate, complete, or up to date. While the information presented in this review is intended to help you better understand the differences between running shoes, we shall not be held liable for any purchasing decisions you make based on this information. Please use your own good judgment before making a purchase. The owner of this website receives a small compensation whenever you buy a product after clicking a product link on this website. Read our full disclaimer and privacy policy.