ASICS GEL-Kayano 23 vs. Adidas Ultra Boost review

ASICS GEL-Kayano 23 provides softness, comfort, and a touch of stability to overpronators. Adidas Ultra Boost provides lots of bounce and cushioning and is quite flexible...

The ASICS GEL-Kayano 23 and the Adidas Ultra Boost fall in two different categories with the ASICS GEL-Kayano 23 being a stability running shoe and the Adidas Ultra Boost a neutral cushioning running shoe although the ASICS GEL-Kayano 23 can also be worn by neutral runners, according to ASICS.

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The uppers of the ASICS GEL-Kayano 23 The preceding link takes you to Amazon.com and the Adidas Ultra Boost are similar in that both provide a comfortable fit with a minimum amount of stitches.

The Adidas Ultra Boost The preceding link takes you to Amazon.com has stitches in the sturdy overlays that wrap the midfoot and at the back of the running shoe.

The ASICS GEL-Kayano 23 has stitches at the back of the shoe but keeps the forefoot and midfoot clear.

The Adidas Ultra Boost has a knitted upper, while the ASICS GEL-Kayano 23 comes with mesh that provides structure and a bit of a hold in addition to no-sew overlays around the midfoot. So both running shoes should feel quite comfortable in the toe box.

Because the midfoot overlays are thicker and sturdier in the Adidas Ultra Boost than the no-sew overlays in the ASICS GEL-Kayano 23, the Adidas Ultra Boost is expected to provide a good amount of support around the midfoot, where runners tend to need it most.

At the back, both the ASICS GEL-Kayano 23 and the Adidas Ultra Boost come with a heel counter that cups the heel well and adds additional support behind the heel.

Because both running shoes are meant to provide a cushy ride to runners, they should match up well against each other.

Their midsoles differ in that the Adidas Ultra Boost has one layer of foam, while the ASICS GEL-Kayano 23 comes with two with GEL cushioning between them.

But despite the latter, running shoe lab tests show that the Adidas Ultra Boost is the more cushy running shoe of the two for both men and women.

For women, the two running shoes come close to each other in the amount of cushioning they provide in the heel and in the forefoot, but the Adidas Ultra Boost offers just a tad more and has an extremely cushy heel for women.

The difference in cushioning between the Adidas Ultra Boost and the ASICS GEL-Kayano 23 is a bit larger for men.

In this case, the Adidas Ultra Boost offers almost a maximum amount of cushioning in both the heel and the forefoot to men, while the ASICS GEL-Kayano 23 offers an above average amount.

By looking at the results of the tests, one could conclude that the Adidas Ultra Boost is a good running shoe for heel-strikers.

The ASICS GEL-Kayano 23 is a stability running shoe so comes with a support system on the medial side of its midsole to help stop your foot from rolling too far inward.

This support system includes a midfoot shank that connects the medial side to the lateral side under the midfoot to add stability but also increase midfoot integrity.

The Adidas Ultra Boost is a neutral cushioning running shoe so does not explicitly offer support. However, it comes with a midfoot shank that hooks into the foam at the back on the medial side.

It also provides a good amount of ground contact, which not only increases the stability of the running shoe but also provides you with smooth transitions from heel to toe.

According to running shoe lab tests, the Adidas Ultra Boost and the ASICS GEL-Kayano 23 are almost equally stable, with the ASICS GEL-Kayano 23 providing just a tiny bit more stability than the Adidas Ultra Boost.

The outsoles of the two running shoes look quite different with the ASICS GEL-Kayano 23 having separate slabs of rubber and the Adidas Ultra Boost coming with an all-in-one outsole that looks like a net with small rubber pods.

The outsole setup of both running shoes make them quite flexible running shoes for both men and women, according to running shoe lab tests.

However, it is the ASICS GEL-Kayano 23 that turns out to be more flexible than the Adidas Ultra Boost for both genders.

The women's version of the ASICS GEL-Kayano 23 weighs approximately 9.4 oz (266 grams), and the Adidas Ultra Boost for women weighs 9.3 oz (264 grams).

The men's versions of the shoes weigh 11.5 oz (326 grams) and 11.1 oz (315 grams), respectively, with the Adidas Ultra Boost being the lighter one.

The Adidas Ultra Boost and the ASICS GEL-Kayano 23 look very much alike in what they have got to offer to runners, so if you are a neutral runner, you could go either way.

Because the ASICS GEL-Kayano 23 does not seem to offer a whole lot more stability than the Adidas Ultra Boost, mild overpronators could consider looking into both running shoes too.

However, if you want a super cushy ride or one that is at least more cushy than what the ASICS GEL-Kayano 23 would offer, the Adidas Ultra Boost might be able to offer that.

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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