ASICS Gel Quantum 90 are officially recommended for runners that tend to supinate and have naturally higher arches. After testing from my side, they came up as a truly casual model of sports shoes. As a real model for running, actually, these shoes cannot be recommended.
Too narrow, too tight
Both the upper, the same as the midsole are proposed for very tiny feet. In the size 8.5 which I normally use, I felt my feet squeezed in the toe box. The length is fine. They fit as they should. So taking a higher size also doesn’t solve the narrowness because then you get the shoes too long and when you solve one problem, another one appears. If you take ASICS Gel-Quantum 90 for running, you might break into them after a few runs.
But because the upper is from a synthetic material, the same as the midsole and outsole, they don’t really stretch a lot even after some time. I had it for a few runs and it remained narrow the same way.
How is the midsole?
ASICS Gel-Quantum 90 is given gel cushioning just in the heel. It is really awesome! It feels responsive and bouncy especially when you tend to run over heels. Any heel striker will love this shoe as it is nicely padded with the gel and protective at the same time. It helps to attenuate the shocks that get transmitted into your spine when you run over heels. So as for this cushioning part, I cannot say anything against. Moreover, EVA midsole that is inserted in the rest of the shoe is very lightweight so that you will barely feel these shoes when exercising. As for this aspect, the shoe is pretty good.
Arch support
It should be better, no doubt. I haven’t felt my joints thanks to pretty good cushioning but felt lacking arch support. You can improve it by exchanging the original insoles of ASICS Gel-Quantum 90, and putting something better. But still, because of this, the model feels a bit cheap and I wouldn’t take it for any hard exercise.
All in all, ASICS Gel-Quantum 90 is a low quality sports model. It is priced lower and it perfectly makes sense. If I were to make a decision about the purchase, I would rather go by two classes higher and get something proper like ASICS Gel-Nimbus 21 or ASICS Gel-Cumulus 21. ASICS Gel-Quantum 90 is maybe good for short walks and going out with friends not running itself.