Which should you buy?
Choose the Endorphin Speed 5 if you find it at a good discount and it already suits you.
Choose the Endorphin Speed 6 if you want the latest version and its updates.
It has 2 mm less foam under the heel. It costs £10 less at full price.
Side by side
| Spec | Endorphin Speed 5Saucony | Endorphin Speed 6Saucony |
|---|---|---|
| Review score | Not enough reviews yet | Not enough reviews yet |
| Type | Super trainer | Super trainer |
| Weight (men's UK 8.5) | 230 g | 230 g |
| Heel stack | 36 mm | 38 mm |
| Drop | 8 mm | 8 mm |
| Cushioning | Balanced | Balanced |
| Bounce | Springy | Springy |
| Plate | Nylon plate | Nylon plate |
| Support | Neutral | Neutral |
| Fit | True to size | True to size |
| Widths | standard | standard |
| Waterproof version | No | No |
| UK RRP | £160 | £170 |
Weights are for a men's US 9 / UK 8.5. Prices are UK RRPs; shops often sell for less.
What the critics say
The reviews comparedReviews of the Saucony Endorphin Speed 6 measure it against the Saucony Endorphin Speed 5. Alastair Running's Alastair Dixon found the new version lighter and springier, with a secure heel, though less relaxed at easy paces. Marathon Sports' Abby agreed it suits workouts and racing but found it firm for easy long runs, and both flagged sparse rubber at the heel.
Endorphin Speed 5
- Versatile
- Discounts as stock clears
- Being replaced
Endorphin Speed 6
- Springier PWRRUN PBX foam
- More cushioning but lighter
- Secure heel lock
- Roomier toe box than the Speed 5, though some testers found the length a little short
- Less grounded at easy paces
- Little rubber at the heel
Paraphrased from published reviews.
What's new in each
Saucony Endorphin Speed 6: New PWRRUN PBX foam, 2 mm more stack and a redesigned nylon plate, while dropping about 17 g compared with the Endorphin Speed 5.
About each shoe
About the Endorphin Speed 6
Saucony calls the Endorphin Speed its fast-day trainer and racer, aimed at tempo runs, speed sessions, track workouts and race days. It slots between the plate-free Endorphin Azura and the carbon-plated Endorphin Pro 5, using nylon rather than carbon, which places it in the super trainer class.
Version 6 is a major redesign. The midsole moves to PWRRUN PBX, a beaded PEBA-based superfoam that Saucony describes as lighter and softer while keeping its energy return, with 2 mm more of it underfoot than before. A redesigned nylon plate is claimed to give a smoother, faster transition, and the brand's SpeedRoll rocker geometry has been enhanced. A breathable, lightweight mesh upper is paired with a secure heel fit. Drop stays at 8 mm. It replaces the Endorphin Speed 5 and went on sale in October 2026.
Specs and features from saucony.com and our own spec data. A factual overview, not a review.
Endorphin Speed 5 vs Endorphin Speed 6
In short
The Saucony Endorphin Speed 6 replaced the Saucony Endorphin Speed 5 in October 2026. What's new: New PWRRUN PBX foam, 2 mm more stack and a redesigned nylon plate, while dropping about 17 g compared with the Endorphin Speed 5.
- CheaperEndorphin Speed 5
- More foamEndorphin Speed 6
Get the full story
SauconyEverything on the Endorphin Speed 5What critics loved and didn't, fit and sizing advice, full specs and today's prices.Explore the Endorphin Speed 5
SauconyEverything on the Endorphin Speed 63 video reviews, what critics loved and didn't, fit and sizing advice, full specs and today's prices.Explore the Endorphin Speed 6More comparisons
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