Inov-8 Trailfly Zero First Run Review: A Zero Drop Trail Shoe Done Right

Introduction

Zero drop trail shoes have been a long time coming. Following a road shoe from another zero drop brand, Inov-8’s latest trail release arrives as the third version of the Trailfly line, and the one many riders of the G270 have been waiting for: the Trailfly Zero.

It follows the standard Trailfly from about a year ago and the more deeply cushioned Trailfly Max, and it is expected to feel and perform similarly to both, just with a level midsole. This article breaks down the construction, then covers how it handled a genuinely demanding first run across tarmac, mud, wet rock, roots, stones, and soft sand.

First Impressions

The Trailfly Zero retails for £140 on the Inov-8 website in the UK and is currently offered in two colorways: a navy, light blue and orange scheme, and a white and black option. Bright shoe fans will likely prefer the first.

In a UK 10, the pair weighs 304g. The midsole stack sits at 12mm at the heel and 12mm under the forefoot, which is the whole point of a zero drop shoe. Two fit options are available. Even the standard fit gets a fairly roomy toe box thanks to Inov-8’s new anatomical foot shape design, and there is a wider fit for anyone who wants extra wiggle room up front.

The upper is a lightweight, soft, breathable engineered mesh, closely related to the other two Trailfly versions. Inov-8’s MET cradle protection locks in the heel and midfoot for a secure foothold. Padding around the ankle collar and heel sits at an average level, and the biggest change from the previous shoes is the tongue: still gusseted, but noticeably thinner, with a small area of zonal padding down the center. Anyone who found the G270’s thin tongue uncomfortable on longer runs will want to read the on-trail notes below. A standard lace system, toe box overlays for durability, a heel pull tab, and a substantial toe bumper round things off.

Outsole and Grip

The midsole uses the same Fly Speed Pro foam found in the Trailfly Max, just less of it, paired with Inov-8’s Boomerang footbeds. Those insoles are worth a mention on their own: they add a real level of plushness and bounce underfoot. A meta plate rock plate is worked into the midsole for extra protection on rocky, technical ground.

Down below sits a full graphene grip rubber outsole with a 4mm multidirectional lug pattern. The rubber is infused with graphene, one of the toughest materials in the world, which makes it extremely durable over the miles. Inov-8 also claims an improved rubber blend that grips better in wet conditions, and that claim held up on the first run.

The test route delivered a big mix: hard standing, wet grass, boggy muddy sections, wet tree roots, wet rock, and stony trails. There was no loss of traction anywhere. Grip on wet rocks and roots felt strong, and even with only 4mm lugs, the shoe performed well in heavy mud. On certain wet rock types, some older outsoles could feel sketchy; this one did not.

Fit, Feel and Comfort on the Run

The first run covered 9.67 miles around the Penrose Estate in Cornwall, including a long tarmac stretch back to the car park. The upper delivered a secure lockdown around the midfoot and a good hold in the heel with no foot movement or slippage. Ankle collar padding felt just right: comfortable without being overpadded.

Sizing matters here. The tester went up half a size, and has gone up half a size in every Trailfly, and the fit in length is identical across the family. If you are considering any Trailfly, go up at least half a size.

The thin tongue caused real concern before the run, given past discomfort issues with the G270, but it was comfortable across the top of the foot and the zonal padding did its job. No ankle collar digging, and no lace pressure through the tongue.

As for the ride, zero drop naturally feels a bit more minimal than the other two Trailfly models, but the Fly Speed Pro foam was comfortable on every terrain, including tarmac. Much of that comfort likely comes from the plush, bouncy Boomerang footbeds; without them, this would be a very different feeling shoe. Midsole flexibility is good with plenty of flex at the midfoot and forefoot flex grooves, and underfoot protection on rocky sections actually felt slightly better than in the standard Trailfly. Even the laces performed: easy midfoot lockdown at the start that stayed locked down throughout, where overly stretchy laces often work loose.

Buying Advice

Compared to the Trailfly G270, this feels like a better trail shoe overall. The new upper design suits the tester’s foot shape better, and the added toe box room from the anatomical foot shape design makes a real difference. Anyone who enjoyed the G270 will very likely enjoy these too.

Practical checklist before buying: budget £140 on the Inov-8 website in the UK, pick between the two current colorways, size up at least half a size, and choose the wider fit only if you genuinely want extra room up front.

Conclusion

The Trailfly Zero caps off the Trailfly trilogy with a convincing zero drop option. Wet grip is genuinely improved, the upper is comfortable and secure, the Boomerang footbeds add meaningful cushioning, and the fit refinements over the G270 are real. For anyone wanting a low, flexible, zero drop trail shoe that still protects and grips on mixed terrain, this belongs on the shortlist.