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Nike ZoomX Streakfly: Light and Fast – a 5K PB Shoe for 2022
Lighter running shoes really do make you faster.
If you carry a bag and then reduce its weight by 100g, it will make just about zero difference to how fast you run. However, if you make your shoes 100g lighter then you will save 1% or 12 seconds for a 20-minute 5K runner. That’s because the 100g is swung on the end of a pendulum, your leg, many times as you run. Your physicist friends will tell you the equation 😉
Nike Streakfly comes in at 170g which is about a 50g saving over a typical mens’ shoe of 230g.
How much faster does Streakfly’s carbon plate make you? Errr. It hasn’t got one. Not to worry as I’m not entirely convinced that the carbon tech makes most of us ‘normal’ runners any faster.
I am, however, convinced that Nike’s PEBAX foam adds most of the speed for me with some Nike shoe models. Streakfly has PEBAX on the midsole to aid transition (heel-to-toe…not T1 😉 ). I reckon that the PEBAX foam on the AirFly makes me between 2% and 4% faster at any endurance speed. So Streakfly or VaporFly or AirFly really could knock 30 seconds off your 5K PB literally overnight.
Running flats tend to be light because they totally minimise material and that includes the sole material. Consequently, in the past, they tend to be much less cushioned than your ‘trainers’. Not so with the Streakfly. With a race-legal 32mm stack it has similar cushioning to the VaporFly Next%2, which I highly rate. I have some similar AirFlys next to me now but I’ve not run with them yet, they have PEBAX too.
Other 5K contender shoes for 2022 are Adios Pro 2 (again I have some that I’ve not used yet) and Takumi Sen 8, which I won’t try.
Streakfly is available now as of: 28 Jan 2022:
That price is significantly cheaper than for the AirFly/VaporFly models. Although over Christmas 2021, nike did reduce the AirFly temporarily to about £135 and I snuck in a pair at that price.
I don’t get freebies from Nike and this post isn’t sponsored.
Check out some of the new colours on other models…hmmm.
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