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40Race Shoe FinderThe independent race lab

New Balance FuelCell SC Elite v5 v. Nike Alphafly 3

The wide-foot answer to the Alphafly: a broader platform, a 4mm drop, and £35 less.

The short answer

The New Balance FuelCell SC Elite v5 is 36g lighter (182g against 218g), the New Balance FuelCell SC Elite v5 is £35 cheaper at RRP (£250 against £285), and both hold their foam for roughly 250km of racing. Both are inside the World Athletics 40mm road limit.

Weight · men's US 9

FuelCell SC Elite v5182g
Alphafly 3218g

Price · UK RRP

FuelCell SC Elite v5£250
Alphafly 3£285

Competitive life · km before the foam fades

FuelCell SC Elite v5250km
Alphafly 3250km

marks the better figure, where better is not a matter of taste

010203040504036

FuelCell SC Elite v540mm — on the limit

010203040504032

Alphafly 340mm — on the limit

Midsoles to the same scale · mm · red dashes mark the 40mm road limit

The tape

SpecificationFuelCell SC Elite v5Alphafly 3
RRP£250 (advantage)£285
Weight182g (advantage)218g
Stack40 / 36mm40 / 32mm
Drop4mm8mm
Road legalyesyes
Platecarbon fibrecarbon fibre
FoamPEBA FuelCellZoomX with Air Zoom pods
Competitive life~250km~250km
Price per km of life£1.00 (advantage)£1.14
Fitwidestandard
Underfootstablebalanced
Built forHalf · MarathonHalf · Marathon
Economy gain3.3–4.5%3.4–4.6%

Reading — both shoes, your race

= 5:20/km

FuelCell SC Elite v5

Projected
3:40:473:42:08
Saving
2:52 … −4:13
Per second
£0.30
Per race
£63
Races in the foam
~3.9

Alphafly 3

Projected
3:40:403:42:01
Saving
2:59 … −4:20
Per second
£0.33
Per race
£72
Races in the foam
~3.9

Modelled economy gain adjusted for pace and your current shoes; ranges reflect the spread published between individual runners. Full method.

Which we would choose

RaceFor the timeFor the money
Half marathonat a reference 1:45:00Alphafly 3−1m 30s to −2m 10sFuelCell SC Elite v5cheaper per second saved
Marathonat a reference 3:45:00Alphafly 3−2m 59s to −4m 20sFuelCell SC Elite v5cheaper per second saved

Reference times, trainer baseline, whole-life economics. Your own time changes the answer — use the reading above.

The case for each

Nike Alphafly 3

Still the reference marathon shoe. The Air pods give a propulsive forefoot that nothing else quite replicates, and the wider platform makes it manageable late in a race when your form has gone.

■ Caution Sits at exactly 40mm — legal, but with no margin. It is a lot of shoe for anyone racing slower than about 4:30/km, and the forefoot pods reward a genuine forefoot strike.

Straight answers

Which is lighter, the New Balance FuelCell SC Elite v5 or the Nike Alphafly 3?
The New Balance FuelCell SC Elite v5, at 182g against 218g — a difference of 36g per shoe (men's US 9).
Which is cheaper, the New Balance FuelCell SC Elite v5 or the Nike Alphafly 3?
The New Balance FuelCell SC Elite v5, at £250 UK RRP against £285 — £35 less. Street prices move, so check the retailer for the live figure.
Are the New Balance FuelCell SC Elite v5 and Nike Alphafly 3 legal for road racing?
Yes. Both measure inside the World Athletics 40mm road limit — the FuelCell SC Elite v5 at 40mm and the Alphafly 3 at 40mm.

Manufacturer-stated specs unless marked estimated on the shoe sheet · last reviewed 2026-08-13 · prices are UK RRP.