Nike Zoom Fly 6 vs Saucony Endorphin Speed 6

Two plated trainers for faster running. The Zoom Fly 6 uses a full carbon plate and is firmer, more durable and £15 cheaper, so it doubles as a budget race shoe. The Endorphin Speed 6 has a more flexible nylon plate, is about 20 g lighter and bouncier, and it's more fun day to day.

By the RunShoeRotation team. Written October 2026; specs, scores and prices updated October 2026. How we compare shoes.

Which should you buy?

Choose the Zoom Fly 6 if you want a durable, carbon-plated shoe for tempo runs and races on a budget.

Choose the Endorphin Speed 6 if you want a bouncier, lighter shoe for workouts and long runs with some pace.

The Zoom Fly 6 is 18 g heavier than the Endorphin Speed 6. It has 2 mm more foam under the heel. It costs £15 less at full price.

Side by side

SpecZoom Fly 6NikeEndorphin Speed 6Saucony
Review score93/100 (2 reviews)Not enough reviews yet
TypeSuper trainerSuper trainer
Weight (men's UK 8.5)248 g230 g
Heel stack40 mm38 mm
Drop8 mm8 mm
CushioningBalancedBalanced
BounceBouncySpringy
PlateCarbon plateNylon plate
SupportNeutralNeutral
FitTrue to sizeTrue to size
Widthsstandardstandard
Waterproof versionNoNo
UK RRP£155£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

Zoom Fly 6

  • Versatile super trainer that handles tempo and marathon sessions
  • Excellent durability for the price
  • Secure, comfortable upper
  • Firm, muted ride lacks bounce
  • Narrow, low toe box

Scores from RunRepeat, Road Trail Run.

Endorphin Speed 6

  • Springier PWRRUN PBX foam
  • More cushioning but lighter
  • Secure heel lock
  • Less grounded at easy paces
  • Little rubber at the heel

Paraphrased from published reviews.

What's new in each

Nike Zoom Fly 6: Lighter than the Zoom Fly 5, with softer cushioning and a more flexible carbon plate that feels less aggressive underfoot.

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.

Prices for the Zoom Fly 6 Prices for the Endorphin Speed 6

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