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40Race Shoe FinderEst. 2023 · London

Head to head

adidas Adizero Adios Pro 4vs
On Cloudboom Strike

Adizero Adios Pro 4

£176

Typical street price · £230 RRP

39mm — road legal
Cloudboom Strike

£175

Typical street price · £270 RRP

39mm — road legal

Choose the Adizero Adios Pro 4 if…

  • You want a conventional fit rather than a narrow or wide last.
  • You are racing 10K — built for it, where the Cloudboom Strike is not.
  • You would rather buy on measured numbers: this shoe's specs are manufacturer-confirmed, the Cloudboom Strike's are estimated.

Choose the Cloudboom Strike if…

  • You want the lighter shoe: 195g against 210g, a 15g difference you will feel late in a race.
  • You have a narrow foot and want to be locked in.

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 marathon from 3:45:00

Time back
Adizero Adios Pro 4: 165s–240sCloudboom Strike: 152s–233s
Cost per second saved
Adizero Adios Pro 4: £0.21Cloudboom Strike: £0.23

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.

010203040503933
Adizero Adios Pro 4
010203040503933
Cloudboom Strike

What you pay

Street price
Adizero Adios Pro 4£176
Cloudboom Strike£175■

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

RRP
Adizero Adios Pro 4£230
Cloudboom Strike£270

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

Cost per race
Adizero Adios Pro 4£43■
Cloudboom Strike£44

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

Cost per second saved
Adizero Adios Pro 4£0.21■
Cloudboom Strike£0.23

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

What it does

Estimated saving
Adizero Adios Pro 4165s–240s■
Cloudboom Strike152s–233s

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

Economy gain
Adizero Adios Pro 43.2–4.3%■
Cloudboom Strike3–4.2%
Built for
Adizero Adios Pro 410K · Half · Marathon
Cloudboom StrikeHalf · Marathon
Best use case
Adizero Adios Pro 4The best value at the very top of the market. Within touching distance of the Evo 2 for performance at half the price and twice the life.
Cloudboom StrikeA genuinely competitive marathon racer and the first On shoe that belongs in this conversation on merit.

How it is built

Weight
Adizero Adios Pro 4210 g
Cloudboom Strike195 g■

Manufacturer figure at men's US 9.

Stack (heel)
Adizero Adios Pro 439 mm
Cloudboom Strike39 mm
Stack (forefoot)
Adizero Adios Pro 433 mm
Cloudboom Strike33 mm
Drop
Adizero Adios Pro 46 mm
Cloudboom Strike6 mm
Foam
Adizero Adios Pro 4Lightstrike Pro
Cloudboom StrikeHelion HF
Plate
Adizero Adios Pro 4carbon fibre
Cloudboom Strikecarbon fibre

Rules and fit

Road legal
Adizero Adios Pro 4Yes (39 mm)
Cloudboom StrikeYes (39 mm)

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

Fit
Adizero Adios Pro 4standard
Cloudboom Strikenarrow
Stability
Adizero Adios Pro 4balanced
Cloudboom Strikebalanced

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

Race life
Adizero Adios Pro 4~260 km■
Cloudboom Strike~250 km

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

Data confidence
Adizero Adios Pro 4verified■
Cloudboom Strikeestimated

■ 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£150at Runningbear — £80 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£175at Fitstuff — £95 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.