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40Race Shoe FinderEst. 2023 · London

Head to head

adidas Adizero Takumi Sen 11vs
Nike Streakfly 2

Adizero Takumi Sen 11

£95

Typical street price · £180 RRP

33mm — road legal
Streakfly 2

£105

Typical street price · £155 RRP

32mm — road legal

Choose the Adizero Takumi Sen 11 if…

  • You want the bigger return: 2.6–3.6% economy gain against 1.8–2.9%, and that gap widens the longer you are out there.
  • You race off a strong, repeatable stride and want the more aggressive ride rather than the safer one.

Choose the Streakfly 2 if…

  • 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 more races out of one pair: about 300km of competitive life against 250km.

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 5k from 22:00

Time back
Adizero Takumi Sen 11: 14s–22sStreakfly 2: 8s–17s
Cost per second saved
Adizero Takumi Sen 11: £0.16Streakfly 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.

010203040503327
Adizero Takumi Sen 11
010203040503226
Streakfly 2

What you pay

Street price
Adizero Takumi Sen 11£95■
Streakfly 2£105

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

RRP
Adizero Takumi Sen 11£180
Streakfly 2£155

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

Cost per race
Adizero Takumi Sen 11£2.85
Streakfly 2£2.62■

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

Cost per second saved
Adizero Takumi Sen 11£0.16■
Streakfly 2£0.21

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

What it does

Estimated saving
Adizero Takumi Sen 1114s–22s■
Streakfly 28s–17s

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

Economy gain
Adizero Takumi Sen 112.6–3.6%■
Streakfly 21.8–2.9%
Built for
Adizero Takumi Sen 115K · 10K
Streakfly 25K · 10K
Best use case
Adizero Takumi Sen 11A short-distance specialist with real carbon underneath. Firm, aggressive and brilliant for 5K and 10K where a marathon shoe feels like too much.
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
Adizero Takumi Sen 11160 g■
Streakfly 2170 g

Manufacturer figure at men's US 9.

Stack (heel)
Adizero Takumi Sen 1133 mm
Streakfly 232 mm
Stack (forefoot)
Adizero Takumi Sen 1127 mm
Streakfly 226 mm
Drop
Adizero Takumi Sen 116 mm
Streakfly 26 mm
Foam
Adizero Takumi Sen 11Lightstrike Pro
Streakfly 2ZoomX
Plate
Adizero Takumi Sen 11carbon fibre
Streakfly 2nylon

Rules and fit

Road legal
Adizero Takumi Sen 11Yes (33 mm)
Streakfly 2Yes (32 mm)

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

Fit
Adizero Takumi Sen 11narrow
Streakfly 2narrow
Stability
Adizero Takumi Sen 11demanding
Streakfly 2balanced

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

Race life
Adizero Takumi Sen 11~250 km
Streakfly 2~300 km■

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

Data confidence
Adizero Takumi Sen 11estimated
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£95at Runningbear — £85 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.