Run So Fly Flare Elite Review: A Featherweight Carbon Racer at a Bargain Price

Introduction

The Run So Fly Flare Elite, sold as the Gunfire in China where it is manufactured, is a surprise package: a carbon-plated super shoe with a 42mm heel stack, a PEBAX midsole and a measured weight of just 177g in the largest available size, all for £143 in the UK. It is a shoe that punches far above its price, and one that makes you wonder what more expensive racers are actually charging for.

Who This Product Is For

This is a shoe for runners who love the classic carbon plate recipe: a soft, compressive PEBAX foam, a prominent forefoot rocker and almost no weight on the foot. If you enjoy a fast turnover, land midfoot, and want a race-day weapon for 10K to half marathon efforts, the Flare Elite fits the brief remarkably well.

Upper: Bare-Minimum Purity

The upper is about as simple as a running shoe gets. It uses a thin C3 mesh, a very thin heel counter, no extra overlays, and minimal padding around the heel collar. There is a flexible knit tongue area similar to the Alphafly 3, serrated laces, and extra eyelets for a runner’s knot, which is practically required here given how flexible the upper is. Breathability is exceptional, so cold-weather runners will need their sock game on point.

It scores well for purists who have always wondered why brands pile extra materials onto race shoes. The only real limitation is toe box protection: apart from a small bumper, there is essentially nothing up front.

Midsole and Ride: Soft, Rockered and Fast

The PEBAX midsole measures Shore A 18, very soft, sitting somewhere between the original Vaporfly feel and the more compressive modern racers. The 42mm heel with roughly 34mm in the forefoot gives the classic 8mm drop, and the carbon plate produces a very prominent rocker: your foot rolls down and the toes lift upward, almost like you are falling off the edge of a stair.

At 177g, the shoe largely disappears on foot, and it genuinely lowers perceived effort at faster paces. There is even an ATTPU insole that appears to advertise 80% energy return. The softness does have consequences: the heel is not the most stable, midfoot landing with quicker cadence suits it far better, and for some runners it may be too soft for the marathon. Around 10K to half marathon effort is where it felt best.

Outsole: Light Traction, Road Only

The outsole is pared back in the same way as the upper. It uses a thin layer of what appears to be ground contact polyurethane, similar in thickness to Adidas’ Lighttraxion-style outsoles, which suggests good durability for road use. Two cutout areas in the midfoot and heel, however, are just the right size for collecting rocks.

Wet-road grip was acceptable for such a thin application, though not as sticky as the best in class. The shallow rubber depth and the exposed PEBAX midsole, which is easily punctured by glass, stones and thorns, mean this is strictly a road and pavement shoe. Keep it away from jagged terrain and it should hold up well.

Sizing: The One Big Catch

Here is the fly in the ointment. The largest version available is a men’s US 10, labelled UK 9 with a stated 28cm internal length, but it fits more like a UK 10 or 10.5. If you are a UK 11 like the tester, you will need to size down significantly, and there is very little toe room to spare. Anyone above roughly UK 10.5 is simply out of luck, since this is the biggest size the shoe comes in.

That sizing restriction is the single biggest risk with this shoe, especially when buying online from limited retailers. If your size falls within the range it caters for, you get a mega-light, super fun bargain. If it does not, there is no value at all, because the shoe simply will not fit.

Buying Advice

At £143, this is a lot of performance for the money. It is lighter and cheaper than many racers that offer less on the road. Treat it as a premium-session shoe rather than an everyday trainer: save it for tempo runs, races and fast efforts, avoid sharp debris and stairs, and double-check your size before ordering. For half marathon distances and shorter, it is a genuinely compelling race weapon.

Conclusion

The Run So Fly Flare Elite is an unexpected banger: shockingly light, fun, rockered and quick, with a bare-minimum build that puts every gram where it matters. The sizing runs restrictive and the exposed PEBAX needs careful handling, but if it fits, it might be the best value carbon racer around.