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The Endorphin Speed 4 is Saucony's neutral training and racing shoe, built around a PWRRUN PB foam midsole with a winged nylon plate. The nylon plate is more forgiving than the carbon plates in racing shoes, so the shoe works for daily tempo runs as well as race day. It sits lighter and more flexible than the Endorphin Pro and is a more versatile pick than stiff carbon racers. Reviewers like the smooth roll and the foam's energy return; some find the upper thin and the fit narrow.
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Lowest price we've seen: $80.00 on Nov 4 at A Snails Pace Running Shop; highest $114.95 on Nov 10. Tracked across 19 stores since Nov 4.
Runners rate the Speed 4 highly, praising the foam's bounce and the plate's smooth transition. Complaints center on a snug, thin upper and reduced stability at easy paces.





