ASICS GEL-Kayano 25 vs. Saucony Guide ISO review

ASICS GEL-Kayano 25 provides comfort and stability to moderate overpronators. Saucony Guide ISO provides lots of stability and support to mild and moderate overpronators...

The Saucony Guide ISO and the ASICS GEL-Kayano 25 are stability running shoes for runners who moderately overpronate.

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The uppers of the Saucony Guide ISO The preceding link takes you to Amazon.com and the ASICS GEL-Kayano 25 differ quite a bit in construction.

While the ASICS GEL-Kayano 25 The preceding link takes you to Amazon.com is more geared towards delivering comfort through its upper, the Saucony Guide ISO is more focused on providing a customizable fit and a good amount of support.

The ASICS GEL-Kayano 25 is quite open from midfoot to forefoot and does not expose any overlays other than a few that run along the saddle and the collar.

All other overlays have been moved to the inside of the running shoe and have become underlays that provide lightweight support. The mesh of the ASICS GEL-Kayano 25 also delivers some structure and support, but all can be seen as lightweight.

The Saucony Guide ISO, on the other hand, comes with a couple of no-sew overlays that wrap around the midfoot and the sides of the toe box.

In addition, there are a few separate sections in the saddle that can be customized to fit the way you want them to, so the Saucony Guide ISO is more likely to deliver a more secure and personalized fit around the midfoot.

At the back, both running shoes are quite closed up and deliver a good amount of support, but the ASICS GEL-Kayano 25 is the one that comes with a sturdy external heel counter that locks the heel in and minimizes heel rotation.

When you consider all of the support delivered through the upper, the Saucony Guide ISO can be seen as delivering a more balanced amount of support throughout its entire upper, while the ASICS GEL-Kayano 25 is more focused on delivering lots of support around the heel and lightweight support elsewhere in the running shoe.

Note that because the toe box of the ASICS GEL-Kayano 25 does not have overlays running at its sides like that of the Saucony Guide ISO does, the ASICS GEL-Kayano 25 is likely to feel more comfortable than the Saucony Guide ISO, although the latter does have a bunion window that is somewhat open.

The midsoles of the ASICS GEL-Kayano 25 and the Saucony Guide ISO also differ in construction.

The ASICS GEL-Kayano 25 comes with two layers of foam from heel to midfoot, and then the softer layer closest to the foot continues to run into the forefoot to deliver a good amount of forefoot cushioning.

The ASICS GEL-Kayano 25 also has GEL cushioning in its heel to deliver shock absorption at heel-strike.

The Saucony Guide ISO is different in that it comes with one main layer of foam, and then it has a topsole construction of softer foam to provide heel-to-toe cushioning.

The Saucony Guide ISO is a running shoe that is meant to deliver plush cushioning but still feel responsive, according to Saucony.

Lab tests have found that the Saucony Guide ISO does deliver a good amount of forefoot cushioning, but its heel is more moderately cushioned and might even feel firm to some runners.

The ASICS GEL-Kayano 25 is more or less alike in that it also has a cushy forefoot, but its amount of heel cushioning is also on the moderate to firm side.

Therefore, the cushioning profiles of the Saucony Guide ISO and the ASICS GEL-Kayano 25 display some similarities.

The ASICS GEL-Kayano 25 has a higher heel-to-toe drop than the Saucony Guide ISO and sits higher off the ground so puts more foam between you and the road.

Women get 3 mm of extra height under their heels in the ASICS GEL-Kayano 25 to take stress off their Achilles. The Saucony Guide ISO does not offer such a feature to women, but women do get a somewhat thicker forefoot from the Saucony Guide ISO.

Both the ASICS GEL-Kayano 25 and the Saucony Guide ISO are meant to provide pronation control to overpronators and do so by having a support system on the medial side of the midsole.

The support system of the ASICS GEL-Kayano 25 consists of a midfoot shank that provides support right under the midfoot and foam that is meant to distribute pressure when your feet rolls inward.

The Saucony Guide ISO does not come with a midfoot shank but rather provides a good amount of ground contact under the midfoot to increase stability and give you smoother heel-to-toe transitions.

The Saucony Guide ISO also comes with a medial post to help stop your feet from rolling too far inward.

While this post is not very long like in other stability running shoes that deliver a stronger degree of pronation control, it does run high till under the foot, which the support system of the ASICS GEL-Kayano 25 does not do, because there is that softer layer of foam just under the heel to prevent it from going all the way up.

Therefore, the Saucony Guide ISO might deliver a somewhat stronger degree of pronation control.

However, because the ASICS GEL-Kayano 25 also comes with the external heel counter in the upper that starts the process of stopping your feet from rolling too far inward, when you combine this with the support offered by the midsole, the Saucony Guide ISO and the ASICS GEL-Kayano 25 come close to providing a similar amount of support.

The rubber outsoles of the two running shoes are also quite different in construction.

The outsole of the Saucony Guide ISO is well segmented on the lateral side, and it tends to have wide and lots of flex grooves in the forefoot.

The ASICS GEL-Kayano 25 is different in that it comes with large rubber compartments and displays less segmentation and separation than the outsole of the Saucony Guide ISO.

Segmentation and separation is good for absorbing and dissipating shock, which in turn will help you achieve a smoother ride.

They can also help with flexibility, but in the case of the Saucony Guide ISO, they do not do that, because the Saucony Guide ISO delivers quite a bit of forefoot cushioning, which in turn makes the running shoe feel stiff under your foot.

The ASICS GEL-Kayano 25 has also been found to be a stiff running shoe for both men and women, because it too has a cushy forefoot with just a couple of flex grooves.

Another difference between the outsoles is that the ASICS GEL-Kayano 25 comes with a vertical flex groove that is meant to help with gait efficiency.

The women's version of the ASICS GEL-Kayano 25 weighs approximately 9.8 oz (278 grams), and the Saucony Guide ISO for women weighs 8.9 oz (253 grams).

The men's version of the the ASICS GEL-Kayano 25 weighs about 11.9 oz (337 grams), and the Saucony Guide ISO for men weighs approximately 10.5 oz (298 grams).

The ASICS GEL-Kayano 25 and the Saucony Guide ISO differ a lot in construction but are capable of serving the same types of runners, that is, mild to moderate overpronators.

If you are looking for lots of comfort in a running shoe, the ASICS GEL-Kayano 25 might be the one to look into, and if you are looking for a more secure and customizable fit, the Saucony Guide ISO would be the one to consider.

Both the ASICS GEL-Kayano 25 and the Saucony Guide ISO are capable of delivering an overall soft ride, but their heels could feel firm to some runners.

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 | Saucony

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