Inov-8 RoadFly Review: A Low-Stack Throwback in a Big-Stack World

Introduction

Inov-8 is better known for its off-road credentials, with shoes like the TrailFly popular among regular trail and ultra runners. The RoadFly is the brand’s first road shoe in a while, and the first of a suite of new road models. By Inov-8’s own admission, it is essentially a trail shoe with the technology you do not need stripped out.

That means this is not another daily trainer chasing the trend for big, soft stacks. It sits at a conservative 27mm in the heel and 21mm under the forefoot, with a 6mm drop matching the TrailFly. At 9.5oz / 268g in a UK men’s 8.5 wide fit, it is at the lighter end, though perhaps a shade heavy for the stack on offer. Pricing sits at the cheaper end for daily trainers at £100 in the UK or $130 in the US, alongside value picks like the Puma Velocity Nitro 3, Hoka Rincon and Adidas Adizero SL.

After close to 50km of testing across paces from easy efforts to 5K pace, here is how it holds up.

Who the Inov-8 RoadFly Is For

This is a shoe for runners who have been quietly longing for a more traditional, natural ride with a lower stack. In a world of mega-soft, super-springy, big-stack plated monsters, the RoadFly is definitely a throwback, and it will not suit everyone because of that.

If you want reliable landings you control, a snappy responsive feel, and a shoe that rewards good form, this is worth a serious look. Runners coming from hulking great shoes like the Brooks Glycerin Max or New Balance SC Trainer V3 will instantly notice the more traditional feel of the midsole.

Fit and Sizing

The RoadFly comes in a standard and a wide fit, the latter designed to give wider-footed runners more room in the toe box and a wider platform under the heel. Testing in a UK 8.5, the regular size in Inov-8 running shoes, the wide fit was recommended and proved wonderfully roomy.

The upper is cut from a single piece of quite thick engineered mesh that is nicely flexible with a slipper-like comfort, paired with gusseted tongues, a plush medium-padded heel collar, and support from a flexible internal heel counter. There is a sweeping anatomical toe box with oodles of room to splay and wiggle your toes.

Heel hold was good, midfoot lockdown was solid with no slipping or hot spots. Go true to size, and if you like a roomy fit, absolutely go for the wide.

Ride and Performance

The midsole uses a firmer-tuned, more responsive PowerFlow Pro foam, with a TPU Boomerang insole adding cushioning on landing and a boost of energy return, something also seen in Inov-8’s trail shoes. The smaller stack is on the firmer side but still soaks up the road well for a low-stack shoe, with some of the softness coming from that TPU footbed.

Step-in comfort is excellent, with an accommodating, unfussy fit right from the first lace-up. Once moving, the RoadFly is nimble, agile and responsive, but it works best with a faster foot turnover. It gave back more when moving with good form and light feet; on fatigued, heavier-legs days, more cushion protection was sometimes wanted.

The longest run logged was 10 miles. Runners used to minimal shoes will find enough comfort to go longer, but many runners will want more underfoot for efforts beyond 90 minutes. For the fastest sessions, you may also want more energy from livelier midsole and plate combos; this is not a shoe to trouble the Saucony Endorphin Speed 4 or Hoka Mach X2 class of super trainers. It is more of a casual, everyday running shoe, but the natural ride has real appeal: unlike bigger, bouncier shoes, it does not run you.

Grip, Durability and Value

The outsole features a full covering of durability-boosting Inov-8 rubber with 2mm lugs, plus a MetaFlex groove cut in for extra flex and a more natural ride feel. Grip was great in the wet, and durability looks solid. These are qualities long enjoyed in Inov-8’s trail shoes, and they carry over here.

At £100 / $130, it is genuinely competitive. You get a roomy fit, just enough road-softening cushioning, bucket loads of responsiveness, and a ride that keeps you connected to the road, all at a price well below most big-stack alternatives.

Buying Advice

Buy the RoadFly if you want a versatile daily trainer that handles a range of paces and distances with a traditional, lower-stack feel. Skip it if you have moved on with the cushioning you want, or if you need maximum protection for long runs. It is hard to draw direct comparisons with the mainstream shoes now on offer, but the closest vibe is something like an older Hoka Clifton-era ride: firm, snappy and honest.

Conclusion

The Inov-8 RoadFly will not suit every runner, and that is exactly the point. It is a very capable shoe for those looking to buck the big-stack trend and tread a more traditional path, combining a roomy comfortable fit, a snappy reliable ride and excellent wet-weather grip at a really competitive price.