ASICS GEL-Foundation 12 vs. ASICS GEL-Fortify review

ASICS GEL-Foundation 12 provides a good amount of support and a smooth and stable ride. ASICS GEL-Fortify provides support, comfort, and stability in a heavy-duty package...

The ASICS GEL-Foundaton 12 and the ASICS GEL-Fortify are motion control running shoes that are geared towards runners who severely overpronate.


The uppers of the ASICS GEL-Foundation 12 The preceding link takes you to and the ASICS GEL-Fortify are similar in that both provide lots of support through the use of sturdy stitched-on overlays, especially on the medial side of the shoes.

The difference is that the ASICS GEL-Foundation 12 has additional no-sew overlays on the lateral side of the shoe to add structure, while the ASICS GEL-Fortify The preceding link takes you to continues implementing the more supportive stitched-on overlays.

Another difference is that the ASICS GEL-Fortify has an external heel counter at the back of the shoe to really lock down the heel, while the ASICS GEL-Foundation 12 does not have such an external heel counter.

Overall, the ASICS GEL-Fortify implements more overlays than the ASICS GEL-Foundation 12, which could perhaps make it a bit less breathable than the ASICS GEL-Foundation 12, but certainly more supportive.

The ASICS GEL-Foundation 12 has an SpEVA midsole to provide cushioning, while the ASICS GEL-Fortify implements the newer FluidRide midsole that provides heel-to-toe cushioning.

FluidRide is also used in for example the ASICS GEL-Kayano 21 and the ASICS GEL-Nimbus 17, which are both known to be very cushy running shoes.

The ASICS GEL-Fortify is very much like the ASICS GEL-Kayano 21, but then with more added support. And just like the ASICS GEL-Kayano 21, the ASICS GEL-Fortify has a softer layer of foam that is closest to the foot and a more responsive layer below.

Because the ASICS GEL-Foundation 12 and the ASICS GEL-Fortify are meant to provide you with pronation control, they both have a piece of firmer foam on the medial side of the midsole, and then along with that a midfoot shank that extends into the medial post to reinforce it.

In both running shoes, the midfoot shank extends from one side to the other under the midfoot. However, the midfoot shank is much larger in the ASICS GEL-Fortify as an indication that it provides a stronger degree of pronation control than the ASICS GEL-Foundation 12.

This is also evident from the fact that the supportive medial post in the ASICS GEL-Fortify extends higher up towards the foot than the one in the ASICS GEL-Foundation 12.

On the slowing down of motion side of things, both provide extra heel cushioning in the form of GEL cushioning. But while you can see GEL protruding from the back of the ASICS GEL-Fortify, you don't see any GEL coming out of the ASICS GEL-Foundation 12.


This might be an indication that the ASICS GEL-Fortify provides a softer running experience than the ASICS GEL-Foundation 12. Both also have forefoot GEL cushioning, but neither show it on the outside.

Another midsole similarity is that the midsole extends to the ground under the arch in both running shoe despite them having a midfoot shank. The midfoot shank has been protected with rubber under the shoes.

So both the ASICS GEL-Foundation 12 and the ASICS GEL-Fortify provide almost full ground contact, so should provide you with smooth transitions from heel-strike to toe-off.

Both also provide you with a fairly wide and stable base to stand on, which also accommodates runners who have somewhat larger feet.

The rubber outsoles of the two running shoes are also pretty similar with large rubber compartments that should take a while to wear down and good separation to help flexibility.

The only minor difference is that the ASICS GEL-Fortify has a bit more segmentation going on especially in its rearfoot area. Separation is good for shock dissipation, so that your stride is not affected that much.

Both the ASICS GEL-Foundation 12 and the ASICS GEL-Fortify implement the Guidance Line vertical flex groove to help you achieve an more efficient stride.

The ASICS GEL-Foundation 12 for women turns out to be about 2 oz (57 grams) lighter than the ASICS GEL-Fortify, while the difference is 2.1 oz (60 grams) in the men's versions of the running shoes, with the ASICS GEL-Foundation 12 being the lighter one.

Both the ASICS GEL-Fortify and the ASICS GEL-Foundation 12 are geared towards runners who need lots of support and stability.

Choosing one over the other will depend mainly on how much support you need. If you are of a larger build and are on the very severe side of overpronation, the logical choice would the to choose the ASICS GEL-Fortify.

On the other hand, if your overpronation is not that severe, but you still want a great deal of stability and support from a running shoe that is not too expensive, then the ASICS GEL-Foundation 12 could be an option.

You can see the ASICS GEL-Fortify as the ASICS GEL-Kayano 21, but then with boatloads of stabilty and support added to it. It also makes use of the more heavy-duty cushioning that is available from ASICS these days, so you can expect to get softness as well as comfort from this running shoe.

The ASICS GEL-Foundation 12 is more economically put together with less heavy-duty materials and by reducing the amount of pronation control provided.

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.

This review falls under: ASICS

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.