New Balance FuelCell Rebel V5: A 90km Race Test at the Comrades Marathon

Introduction

Some shoes are tested in labs. The New Balance FuelCell Rebel V5 was tested the hard way: over 90 kilometres of the Comrades Marathon down run, a road ultra that packs the elevation profile of a trail race into the intensity of a city marathon. Picking the right shoe for that course is mission critical, and after plenty of deliberation, the Rebel V5 got the nod. Here is how it held up.

Why Shoe Choice Matters for a 90km Road Ultra

The Comrades down run is unforgiving. Long stretches of downhill pound the legs with impact, the big four-lane dual carriageways throw relentless camber at you, and there is still plenty of uphill to climb. Almost nobody runs the whole thing, so at some point you will be walking, and your shoe needs to look after you when you are not moving efficiently anymore.

The thinking behind choosing the Rebel V5 was simple: it is light, stable, and offers a good balance of cushioning and energy return. For most runners further back in the field, that balance matters more than the small efficiency gains a carbon plate might offer. Once you hit 50, 60, or 70 kilometres and things get ragged, you want protection, cushioning, and comfort first. Speed can be worked on from there.

How It Performed Over 90km

In short: the shoe did exactly what it needed to do, which is the best compliment a race shoe can earn. The cushioning underfoot was excellent, with no foot fatigue by the end. The ride felt light and energetic, not too soft and not sinky, with a nice roll through the stride.

Stability was a genuine highlight. Even on steep cambered sections where you feel almost lopsided on one leg, the shoe stayed controlled and balanced. Grip was good throughout, and comfort on the foot was strong thanks to a relatively roomy toe box, a well-padded heel collar, and an ample padded tongue. Nothing extreme, just dependable coverage that looks after you for hours on end.

The Rebel V5 can also move at pace when you ask it to, which makes it more versatile than a pure comfort shoe. That ability to handle both fast marathon-effort miles and slow, shuffling recovery sections is exactly what a race like this demands.

Things to Consider Before Buying

There was one small fit issue worth noting: a bit of lace pinch on the top of the big toe knuckle on the right shoe, which did not appear on the left. It may have been down to how the laces were tensioned, but it required a mid-race stop to adjust and left a red spot afterwards. Worth experimenting with your lacing before a long race day.

It is also worth being honest about shoe strategy for ultras. A stripped-back racing shoe chosen purely for efficiency may not pay off late in a race when form falls apart. If you own a genuinely comfortable carbon shoe that ticks all the protection and comfort boxes, that is fine too. But for most runners, a well-cushioned, stable, energetic shoe like this one is the safer bet.

Buying Advice

Beyond racing, the Rebel V5 looks well suited to long training runs where you mix up the paces: slowing down, moving into faster marathon-pace miles, and easing back again. That versatility is what makes it a genuinely good all-round shoe rather than a one-race specialist.

If you are targeting a road ultra, or simply want a lightweight daily trainer with real cushioning and stability for long days on your feet, this is a shoe that earns its place. For a race of this nature, the verdict was a clear thumbs up.

Conclusion

The New Balance FuelCell Rebel V5 delivered over 90 kilometres of one of the toughest road races in the world: cushioned enough to protect tired legs, stable enough to handle brutal camber, and energetic enough to move fast when it counted. Add in strong everyday comfort and a versatile ride, and it stands out as a smart choice for road ultras and long mixed-pace training alike.