ASICS GEL-Nimbus 20 vs. Adidas Ultra Boost review

ASICS GEL-Nimbus 20 delivers a soft but responsive ride to neutral runners. Adidas Ultra Boost provides lots of bounce and cushioning with a bit of support.

The ASICS GEL-Nimbus 20 and the Adidas Ultra Boost are neutral cushioning running shoes for runners who do not need much stability and support.

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The uppers of the ASICS GEL-Nimbus 20 The preceding link takes you to Amazon.com and the Adidas Ultra Boost differ somewhat, with the Adidas Ultra Boost having sturdy overlays around the midfoot.

The overlays on the ASICS GEL-Nimbus 20 are more discrete and run throughout the entire upper, with most of them being centered around the midfoot.

However, the overlays on the Adidas Ultra Boost The preceding link takes you to Amazon.com provide a much more secure fit around the midfoot.

The forefoot of the Adidas Ultra Boost is entirely open and free from overlays, while the ASICS GEL-Nimbus 20 has a couple of overlays running on the toe box and at the front of the running shoe.

In addition, the mesh of the ASICS GEL-Nimbus 20 might feel a bit tighter than the knitted upper of the Adidas Ultra Boost.

Both running shoes come with extra support at the back in the form of an external heel counter.

The heel counter of the Adidas Ultra Boost is more like a cage around the heel, while that of the ASICS GEL-Nimbus 20 cups the entire heel.

Both should help prevent heel rotation, but because the heel counter on the Adidas Ultra Boost extends more towards the midfoot than that on the ASICS GEL-Nimbus 20, it might do a better job of diminishing heel rotation.

Both the Adidas Ultra Boost and the ASICS GEL-Nimbus 20 are meant to deliver a soft ride.

The construction of their midsoles differ in that the ASICS GEL-Nimbus 20 comes with two layers of foam in its midsole and GEL cushioning between those two layers.

The Adidas Ultra Boost has just one layer of foam in its midsole.

Running shoe lab tests have found that the Adidas Ultra Boost delivers more forefoot cushioning than the ASICS GEL-Nimbus 20 to both men and women.

In addition, the amount of heel cushioning is almost to the max in the Adidas Ultra Boost for both men and women.

The ASICS GEL-Nimbus 20 delivers a large amount of heel cushioning to women, but still not as much as the Adidas Ultra Boost does, and men will get much more heel cushioning from the Adidas Ultra Boost than from the ASICS GEL-Nimbus 20.

The conclusion is that while the ASICS GEL-Nimbus 20 delivers an above average amount of cushioning so would give runners an overall soft ride, the Adidas Ultra Boost exceeds that amount so would give runners a very soft ride.

The Adidas Ultra Boost also seems to be a good running shoe for heel-strikers when you look at its cushioning profile.

While neither the ASICS GEL-Nimbus 20 nor the Adidas Ultra Boost is meant to deliver pronation control, they do come with midfoot shanks that add midfoot integrity and support.

The midfoot shank of the ASICS GEL-Nimbus 20 consists of two pieces that are not connected under the midfoot, while the midfoot shank of the Adidas Ultra Boost is centered right under the midfoot and has pieces that extend out to the medial side of the midsole.

This helps to increase the stability of the running shoes in addition to delivering midfoot stability and support.

According to running shoe lab tests, both the Adidas Ultra Boost and the ASICS GEL-Nimbus 20 deliver an above average amount of support, which is surprising for neutral cushioning running shoes, but the ASICS GEL-Nimbus 20 is rated slightly higher than the Adidas Ultra Boost.

The rubber outsoles of the two running shoes look quite different, with the Adidas Ultra Boost having a gridlike outsole and the ASICS GEL-Nimbus 20 large slabs of rubber.

While the outsole of the ASICS GEL-Nimbus 20 has more deep flex grooves than that of the Adidas Ultra Boost, running shoe lab tests have found that the Adidas Ultra Boost is still a bit more flexible than the ASICS GEL-Nimbus 20 for both men and women, with both running shoes delivering a below average amount of flexibility so can be seen as somewhat stiff to stiff.

The women's version of the ASICS GEL-Nimbus 20 weighs approximately 8.8 oz (249 grams) and the Adidas Ultra Boost for women weighs 9.3 oz (264 grams).

The men's versions of the shoes weigh 10.7 oz (303 grams) and 11.1 oz (315 grams), respectively.

If you are a neutral runner who is looking for a soft ride from a running shoe, you could go with either the ASICS GEL-Nimbus 20 or the Adidas Ultra Boost, thereby keeping in mind that you would get a slightly softer ride from the Adidas Ultra Boost.

Both running shoes deliver much of the same to runners and do not display very big differences between each other. The main difference is in the upper.

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 Amazon.com where you can read more about the running shoes.


This review falls under: ASICS

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