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40Race Shoe FinderEst. 2023 · London

Head to head

ASICS Magic Speed 5vs
Nike Streakfly 2

Magic Speed 5

£130

Typical street price · £150 RRP

38mm — road legal
Streakfly 2

£105

Typical street price · £155 RRP

32mm — road legal

Choose the Magic Speed 5 if…

  • You want more shoe underneath you late on: 38mm against 32mm, which is protection over a long race rather than speed over a short one.
  • You want something more forgiving. This is the steadier platform — useful if your form goes late, or if you are on your feet longer.
  • You want a conventional fit rather than a narrow or wide last.
  • You want more races out of one pair: about 500km of competitive life against 300km.
  • You are racing Half marathon or Marathon — built for it, where the Streakfly 2 is not.

Choose the Streakfly 2 if…

  • You want the lighter shoe: 170g against 218g, a 48g difference you will feel late in a race.
  • You race off a strong, repeatable stride and want the more aggressive ride rather than the safer one.
  • You have a narrow foot and want to be locked in.
  • Money matters: it is selling around £105 against £130, and the time difference between them is smaller than the price difference suggests.
  • You are racing 5K — built for it, where the Magic Speed 5 is not.

What does this
mean for you?

Every figure below is recalculated from your race and your current time. The gap between two shoes is not fixed — it grows with how long you are on your feet.

Over 10k from 45:00

Time back
Magic Speed 5: 19s–37sStreakfly 2: 16s–33s
Cost per second saved
Magic Speed 5: £0.14Streakfly 2: £0.21

Ranges, not promises. Both figures are against a standard trainer, and the honest answer for most runners is that the difference between two shoes of this class is smaller than the difference a month of decent training makes.

Every number.

010203040503831
Magic Speed 5
010203040503226
Streakfly 2

What you pay

Street price
Magic Speed 5£130
Streakfly 2£105■

What the shoe is actually selling for across the shops we read, not its RRP.

RRP
Magic Speed 5£150
Streakfly 2£155

List price. Almost nobody pays it for a race shoe.

Cost per race
Magic Speed 5£3.90■
Streakfly 2£5.25

Street price divided by the races the foam stays fast for.

Cost per second saved
Magic Speed 5£0.14■
Streakfly 2£0.21

The whole-life question: what each second of race time costs you.

What it does

Estimated saving
Magic Speed 519s–37s■
Streakfly 216s–33s

Against a standard trainer, over the distance and time set above.

Economy gain
Magic Speed 52–3.1%■
Streakfly 21.8–2.9%
Built for
Magic Speed 510K · Half · Marathon
Streakfly 25K · 10K
Best use case
Magic Speed 5The best entry point to carbon. Real plate, real super foam, durable enough to train in, and about half the price of the flagships.
Streakfly 2A proper short-distance racer for people who find full super shoes unwieldy at 5K pace. Lower, firmer, more connected to the ground.

How it is built

Weight
Magic Speed 5218 g
Streakfly 2170 g■

Manufacturer figure at men's US 9.

Stack (heel)
Magic Speed 538 mm
Streakfly 232 mm
Stack (forefoot)
Magic Speed 531 mm
Streakfly 226 mm
Drop
Magic Speed 57 mm
Streakfly 26 mm
Foam
Magic Speed 5FF Blast Turbo
Streakfly 2ZoomX
Plate
Magic Speed 5carbon fibre
Streakfly 2nylon

Rules and fit

Road legal
Magic Speed 5Yes (38 mm)
Streakfly 2Yes (32 mm)

World Athletics caps road racing shoes at 40 mm of stack.

Fit
Magic Speed 5standard
Streakfly 2narrow
Stability
Magic Speed 5stable
Streakfly 2balanced

Neither is better in the abstract — it depends on your stride.

Race life
Magic Speed 5~500 km■
Streakfly 2~300 km

How long the foam stays fast, not how long the shoe survives.

Data confidence
Magic Speed 5estimated
Streakfly 2estimated

■ marks the better figure where one is genuinely better. Fit, foam, drop and stability carry no mark — they depend on your foot and your stride, not on which shoe is superior.

In your size.

Where to buy

Your UK size

Best price today — some sizes£119at Startfitness — £31 under RRP

9 retailer checks failed on the last run, so their prices are missing rather than wrong.

Prices are captured when the site is built and stamped with the time of that check. We never rank a retailer by what it pays us; where a link earns a commission it is marked sponsored and the price you pay is unchanged.

Where to buy

Your UK size

Best price today — some sizes£104.99at Run North West — £50 under RRP

9 retailer checks failed on the last run, so their prices are missing rather than wrong.

Prices are captured when the site is built and stamped with the time of that check. We never rank a retailer by what it pays us; where a link earns a commission it is marked sponsored and the price you pay is unchanged.