Best Running Shoes UK: Should You Size Up for Asics?

By Sahir, Founder of Soleistic

Quick answer: Asics — our most-stocked running-shoe brand — commonly gets sized up half a size by UK retailers, since feet swell during a run; Asics’ own guide also lists wide-width options on several models. Below are our current picks from Soleistic’s catalogue, with live UK pricing — try any of them on your own feet with our AI try-on before you buy.

Should I size up for Asics running shoes?

Many UK retailers recommend sizing up half a size for Asics running shoes, since feet swell during a run — Asics’ own guide also lists extended 2E and 4E wide-width options on styles like the Gel-Kayano, GT-2000 and Gel-Nimbus. See Asics’ official size and fit guide for the details.

How often should running shoes be replaced?

A common guideline is roughly 300-500 miles, since cushioning gradually compresses and stops absorbing impact as well — but this varies by shoe, running style and body weight.

Do I need a different shoe for flat feet?

Some runners with flat feet find more support and stability helpful, but the right shoe genuinely depends on your individual gait and comfort — there is no single shoe that suits every flat-footed runner.

Do these picks change over time?

Yes — this page pulls live stock and pricing from Soleistic’s catalogue each time it loads, so the picks and prices you see reflect what is actually available right now, not a fixed list from when this guide was written.