Asics has three carbon-plated racing shoes in its Metaspeed lineup — the Sky, the Edge, and the Ray — and choosing between them is more nuanced than most shoe comparisons. These aren't just different versions of the same shoe. Each one is engineered for a different type of runner, a different race distance, and a different feel underfoot.

All three are in the Cadence database. Here's everything you need to know to pick the right one.

Quick Comparison

View Asics Metaspeed Sky specs on Cadence →

View Asics Metaspeed Edge specs on Cadence →

View Asics Metaspeed Ray specs on Cadence →

What They All Share

Before getting into the differences, it helps to understand what makes all three Metaspeed shoes special. The Sky and Edge both use a dual-layer midsole combining FF Turbo+ and FF Leap foam — two of the lightest and most responsive foams Asics has ever made. The Ray uses only FF Leap throughout, which is even lighter. All three feature carbon fiber plates and ASICSGRIP rubber outsoles for race-day traction.

The Sky and Edge both weigh around 5.5 oz and are priced at $270 — genuinely lightweight for a fully featured carbon racer. The Ray pushes further at just 4.5 oz, making it one of the lightest racing shoes on the market, at a premium price of $300.

Metaspeed Sky — For Stride Runners

The Metaspeed Sky is Asics' primary marathon racing shoe and the most popular of the three. Its defining characteristic is a full-length carbon plate positioned higher and flatter in the midsole, which creates more vertical bounce and a pronounced rocker geometry that promotes a longer, more propulsive stride. If you naturally speed up by covering more ground per step rather than turning your legs over faster, the Sky is designed for you.

The foam setup is FF Turbo+ on top and FF Leap on the bottom — a reverse of the Edge. The Sky gives a smooth, stable, slightly floating sensation underfoot — soft enough to stay comfortable over marathon distance, responsive enough to keep energy moving forward efficiently. At 5mm drop with a roomier toe box than the Edge, the Sky is more accessible for a wider range of foot shapes and running styles.

Reviewers consistently describe the Sky as the more forgiving and stable of the two traditional Metaspeed options — a shoe that rewards long-distance efficiency over pure short-distance aggression.

Best for: Runners targeting marathons and longer races who speed up by extending their stride length. Also the right pick if you want the most stable and forgiving option in the Metaspeed lineup.

Metaspeed Edge — For Cadence Runners

The Metaspeed Edge is the Sky's more aggressive, lower-to-the-ground sibling. The carbon plate is positioned lower and angled in the midsole — scooping down under the forefoot — which promotes quicker step turnover and a snappier, more aggressive toe-off. Where the Sky pushes you upward and forward with a floating sensation, the Edge pushes you forward with a sharper, more immediate feel.

Critically, the foam layers are reversed compared to the Sky: FF Leap sits on top closest to your foot, and FF Turbo+ sits on the bottom. This means you get a thicker layer of the softer, bouncier FF Leap foam between your forefoot and the plate — creating a surprisingly comfortable and cushioned experience despite the aggressive geometry.

At 8mm drop — compared to the Sky's 5mm — the Edge sits higher at the heel, which makes it more comfortable for heel strikers and easier on the calves and Achilles. It also feels more stable laterally because your foot sits closer to the ground. The tradeoff is a slightly more technical ride that suits shorter distances better than full marathons.

Best for: Runners targeting half marathons and 10Ks who speed up by increasing cadence rather than stride length. Also worth considering if you're a heel striker or find the Sky's 5mm drop too aggressive.

Metaspeed Ray — For Elite Forefoot Runners

The Metaspeed Ray is in a different league. Where the Sky and Edge are premium racing shoes built for serious competitive runners, the Ray is built for elite runners chasing maximum speed with no compromises. At just 4.5 oz it is one of the lightest racing shoes ever made, and it achieves that weight by stripping everything back to the bare essentials.

The Ray uses only FF Leap foam throughout — no FF Turbo+ layer — which makes the ride lighter and bouncier but less stable than the Sky or Edge. The carbon plate is a shorter, 3/4-length design rather than full-length, saving weight while still delivering forward propulsion in the forefoot where it matters most on race day. The MATRYX upper is ultra-lightweight but less structured than the Motion Wrap upper on the Sky and Edge.

Running Warehouse reviewers called it a near-perfect shoe — "bonkers," "class-leading," and one of the best racing shoes ever tested. But it rewards perfect form and penalizes anything less. If you overstride or heel