Saucony Endorphin Speed 4 Review (2026): The Plated Tempo

Why you should trust this review

I bought these shoes and put real miles on them rather than judging from a spec sheet or a single jog. Saucony had no involvement and no input on this review. Running-shoe reviews live or die on real road testing, because the things that decide whether a shoe is worth buying, how the midsole feels at tempo pace, how fast the outsole wears, and when the plate stiffness fades, only show up after you have actually trained in them across workouts and longer efforts. That is what informs everything below.

I ran the Endorphin Speed 4 across the workouts it is built for, tempo runs, intervals, and faster steady efforts, and compared it against the racers and trainers runners cross-shop. Here is the honest verdict.

How we evaluated

I ran the Endorphin Speed 4 across tempo workouts, interval sessions, and faster steady runs on road and track, the surfaces and paces it targets. I assessed the ride quality and how the winged nylon plate and PWRRUN PB foam interact at pace, judged the upper comfort and lockdown over longer efforts, and tracked outsole wear and plate stiffness across the miles to estimate durability honestly. I also wore it on slower easy days to test how versatile it really is, and I weighed its profile against both non-plated daily trainers and full carbon-plate racers.

Ride and the plate

The ride is the star, and it earns the high marks. The winged nylon plate provides genuine plate-shoe propulsion, that sense of being rolled forward through your stride, at a fraction of the cost of a carbon-plate racer. Paired with the PWRRUN PB midsole, one of the bounciest PEBA-based foams in the category, the shoe feels lively and responsive at tempo pace, returning energy without the harsh, unforgiving stiffness of a pure carbon racer. The SpeedRoll geometry encourages a smooth rocker through toe-off. For tempo runs and intervals, this combination is close to ideal: propulsive enough to feel fast, forgiving enough to run repeated hard efforts without beating up your legs.

Weight and race-day use

At a rated 224 grams in a men’s 9, the Endorphin Speed 4 is genuinely light, light enough to use on race day for many runners, not just for workouts. That low weight is a big part of why it feels fast and why it can pull double duty as both a trainer and a racer for sub-elite runners. A true carbon racer will be a touch lighter and a touch more aggressive, but for the runner who wants one shoe that handles tempo training and racing without buying two pairs, the Speed 4 hits a versatile sweet spot. For the vast majority of non-elite runners, this is more shoe than they need on race day in the best way.

Durability and the honest trade-offs

The trade-offs are real and worth knowing. The outsole rubber is zonal rather than full coverage, and it wears faster than a non-plated daily trainer, so if you log heavy mileage you will see the high-wear zones go first. The plate stiffness also fades after roughly 250 to 300 miles, which means the propulsive pop diminishes over the shoe’s life, though that is still meaningfully longer than a carbon racer that often gives up after 100 to 150 miles. So the Speed 4 lasts longer than a racer while costing less, which is the core of its value argument. It is also less forgiving than a soft daily trainer on slow recovery days, where the plate and firm geometry feel over-engineered.

Where it fits in your rotation

The Endorphin Speed 4 is best understood as a tempo and workout shoe that can race, not as a do-everything trainer. For tempo runs, intervals, progression runs, and races up to sub-elite paces, it is excellent. For easy and recovery days, a softer non-plated daily trainer is the better, more comfortable choice, because the Speed 4 feels stiff at jogging pace. If you are coming from the previous Endorphin Speed, the upgrade refines the foam, updates the upper, and slightly opens up the fit, while keeping the plate and rocker geometry that made the line work. For runners deciding between this and a carbon racer, the Speed 4 is the more sensible everyday choice for the money.

Who should buy the Saucony Endorphin Speed 4?

Buy it if you want plate-shoe propulsion for tempo workouts and races without paying carbon-racer prices, you value a shoe that lasts longer than a true racer, and you want one pair that handles fast training and race day. For most non-elite runners, it is the smarter buy than a carbon-plate shoe.

Skip it if you want a soft, forgiving everyday trainer for easy miles, you race seriously and need the absolute fastest carbon racer, or you log very high mileage and want maximum outsole durability. Those runners should choose a daily trainer or a dedicated carbon racer instead.

The verdict

Real miles in the Endorphin Speed 4 confirmed it as the plated tempo trainer most runners should buy. The winged nylon plate and bouncy PWRRUN PB foam deliver genuine propulsion at tempo pace, the rated 224-gram weight makes it light enough to race, and it lasts meaningfully longer than a carbon racer for less money. The honest trade-offs are faster zonal-outsole wear, plate stiffness that fades after 250 to 300 miles, and a ride that feels over-engineered on slow easy days. None of those undercut its core value. If you want one versatile shoe for fast training and racing, the Speed 4 is an easy recommendation. If you need a soft daily trainer or a no-compromise carbon racer, look to those specific tools instead.