ASICS Metaspeed Sky Tokyo vs Nike Vaporfly 4 — Which Racing Shoe Should You Choose?

The ASICS Metaspeed Sky Tokyo and Nike Vaporfly 4 are two lightweight carbon-plated racing shoes designed for personal-best attempts, but they reach that goal through noticeably different constructions.

The ASICS Metaspeed Sky Tokyo combines FF LEAP and FF TURBO PLUS foam around a high, relatively flat carbon plate. ASICS specifically positions it for stride-style runners who tend to increase their speed by lengthening their stride.

The Nike Vaporfly 4 uses full-length ZoomX foam with a curved carbon Flyplate. Nike positions it as a broadly versatile road racer for distances from the 10K through the marathon.

Both cost the same at standard list price and both are built for speed, but their foam arrangements, plate geometry, stack heights, and intended running mechanics create a meaningful decision for race day.

Testing disclosure: Cadence has not personally tested both shoes in this comparison. This guide evaluates their manufacturer-listed specifications, construction, and intended use. Weight, fit, stack measurements, and ride characteristics can vary by shoe size and measurement method.

Quick Verdict

• Choose the Metaspeed Sky Tokyo if you naturally lengthen your stride at faster speeds and want a taller platform with ASICS’s dual-foam racing construction.
• Choose the Vaporfly 4 if you want a lower-profile and broadly positioned racing shoe for distances ranging from the 10K through the marathon.

Cadence’s verdict: There is no universal winner. The Vaporfly 4 is the simpler general recommendation because Nike does not divide runners into a specific stride-style category. The Metaspeed Sky Tokyo is the more targeted choice for runners who understand ASICS’s stride-style concept and know that its plate geometry suits how they accelerate.

Metaspeed Sky Tokyo vs Vaporfly 4: Specs

*Vaporfly stack measurements reflect the current Cadence database because Nike does not list stack height on its current U.S. product page. The official weight figures are not directly comparable because ASICS and Nike use different reference sizes.

The Main Difference: Targeted Geometry vs Broad Versatility

The most important distinction is not the one-millimeter difference in drop. It is how each brand approaches plate geometry and runner mechanics.

ASICS created the Metaspeed Sky Tokyo for runners who tend to increase speed by taking longer strides. Its carbon plate sits relatively high in the midsole and uses a flatter shape than the plate in the Metaspeed Edge Tokyo. ASICS says this design is intended to create more vertical propulsion and help extend stride length.

Nike does not separate the Vaporfly 4 into stride-style and cadence-style versions. Instead, the shoe uses one curved Flyplate geometry intended to provide leverage through toe-off across a broad range of runners and road-racing distances.

That makes the Sky Tokyo more mechanically specific. The Vaporfly is presented as the more universal product, while ASICS asks runners to decide whether the Sky’s geometry matches the way they increase speed.

Metaspeed Sky Tokyo: Dual Foam and a Higher Plate

The Sky Tokyo’s midsole contains two different ASICS foams.

FF TURBO PLUS forms the upper portion of the midsole, closer to the foot. FF LEAP sits underneath the carbon plate. ASICS describes FF LEAP as a lightweight, soft, and highly responsive foam developed for its newest racing products.

The high plate position and thicker forefoot construction distinguish the Sky from the Metaspeed Edge Tokyo. The goal is to create more upward propulsion that a stride-style runner can convert into additional stride length.

The Sky Tokyo carries an official 39.5 mm heel and 34.5 mm forefoot stack. That puts it close to the typical legal limit for road-racing shoes while maintaining a 5 mm drop.

ASICS also uses its lightweight MOTION WRAP 3.0 upper and ASICSGRIP outsole rubber. The upper is designed to provide race-focused containment without substantial added structure, while the outsole places grip in targeted areas rather than covering the entire bottom of the shoe.

Best for: Runners who tend to increase speed through longer strides, prefer a taller racing platform, and already know that ASICS’s Sky geometry works with their mechanics.

View the full ASICS Metaspeed Sky Tokyo specifications on Cadence →

Vaporfly 4: Lighter, Lower, and More Streamlined

Nike redesigned the Vaporfly 4 by reducing material throughout the upper, midsole, and outsole compared with the Vaporfly 3.

The midsole continues to use full-length ZoomX, Nike’s PEBA-based racing foam. A curved carbon Flyplate runs through the shoe, with a higher plate angle than the previous version. Nike also reduced the heel-to-toe drop to 6 mm.

The current Cadence database lists the Vaporfly at 36 mm in the heel and 30 mm in the forefoot. That makes it a lower-profile racing shoe than the Sky Tokyo, at least according to the currently available measurements.

Nike’s official listed weight is approximately 6.7 oz in a men’s US 10. The engineered-mesh upper, reduced tongue and heel construction, and thinner outsole rubber all contribute to the weight reduction from the previous model.

Nike positions the Vaporfly 4 as an all-around road racer for the 10K, half marathon, and marathon. Some product descriptions extend that range down to the mile, but the shoe’s primary role remains longer road racing.

Best for: Runners seeking one lightweight carbon racer for several road-race distances without selecting between separate stride-style and cadence-style models.

View the full Nike Vaporfly 4 specifications on Cadence →

Which Shoe Is Lighter?

ASICS lists the Metaspeed Sky Tokyo at 170 g, or approximately 5.9 oz, in a men’s US size 9. Nike lists the Vaporfly 4 at 190 g, or approximately 6.7 oz, in a men’s US size 10.

Those official figures make the Sky appear lighter, but the comparison is not perfectly equal because the brands use different sample sizes. A size 10 shoe will normally weigh more than the same model in a size 9.

The safest conclusion is that both are exceptionally lightweight racing shoes. The available manufacturer figures should not be used to claim an exact 0.8 oz advantage without matching the shoe sizes first.

Which Shoe Has More Cushioning?

The Metaspeed Sky Tokyo has the taller listed platform.

Its official measurements are 39.5 mm in the heel and 34.5 mm in the forefoot. Cadence currently lists the Vaporfly 4 at 36 mm and 30 mm.

More stack does not automatically mean that a shoe will feel softer or more comfortable. Foam density, plate placement, platform width, and runner mechanics also influence the experience. However, the Sky clearly places more total material between the runner and the road based on the available measurements.

Higher-stack pick: Metaspeed Sky Tokyo.

Which Shoe Is Better for a 5K or 10K?

The Vaporfly 4 is the easier default recommendation for shorter road races because Nike explicitly positions it as a versatile racing shoe and reduced its stack and total material from the Vaporfly 3.

The Sky Tokyo can also be used for shorter races, particularly by runners who respond well to its stride-oriented plate geometry. Its low official weight may make it attractive for fast 5K and 10K running despite the taller platform.

The decision comes down to geometry more than distance alone. A runner who feels efficient in the Sky should not reject it merely because it has more cushioning. A runner uncertain about the ASICS stride-style concept may find the Vaporfly’s broader positioning easier to understand.

5K–10K pick: Vaporfly 4 as the general recommendation; Sky Tokyo when its geometry is already known to suit the runner.

Which Shoe Is Better for the Half Marathon?

Both shoes fit naturally into the half-marathon category.

The Vaporfly 4 combines relatively low weight, full-length ZoomX, and a carbon plate in a design Nike explicitly markets for the distance. Its lower stack may appeal to runners who prefer a more compact racing platform.

The Sky Tokyo provides more listed foam underfoot and uses its FF LEAP layer beneath the plate to support sustained propulsion. Runners who lengthen their stride as the pace increases may prefer its targeted geometry over a long race.

Half-marathon pick: A true personal-preference decision. Fit and race-pace testing should determine the winner.

Which Shoe Is Better for the Marathon?

The marathon is where the Sky Tokyo’s additional stack and specific stride-style design may become most valuable. ASICS describes the high plate position and thicker toe area as features intended to help runners maintain stride length later in a race.

The Vaporfly remains one of Nike’s principal marathon shoes, but the Vaporfly 4 is lighter and lower than the Vaporfly 3. Runners who want the tallest and most protective Nike option may instead consider the Alphafly 3.

The Vaporfly 4 should appeal to marathoners who prefer a lighter, less bulky platform. The Sky Tokyo should appeal to runners who want more underfoot material and respond well to its vertically oriented plate geometry.

Marathon pick: Sky Tokyo for runners who match its stride-style design; Vaporfly 4 for runners who favor a lower and broadly versatile race platform.

Which Shoe Is More Stable?

Neither model is a stability shoe, and both use lightweight racing uppers with narrow, performance-focused constructions.

The Sky Tokyo’s additional stack and soft FF LEAP layer may require more confidence from runners who are sensitive to lateral movement. ASICS places the firmer FF TURBO PLUS layer closer to the foot partly to add structure during landing.

Nike reshaped the Vaporfly 4’s heel, including an outward midsole bulge intended to save weight while improving the platform’s landing characteristics. Its lower listed stack may also appeal to runners who prefer less height underfoot.

These design differences do not establish a universal stability winner. Runners concerned about rearfoot movement should test both at race pace and through corners before choosing either for a long race.

Which Shoe Is the Better Value?

Both shoes carry a standard list price of $270.

Nike frequently discounts individual Vaporfly colorways, so the actual selling price can vary. ASICS pricing is generally more consistent across current Sky Tokyo colorways, though availability can also change.

At equal price, value depends on which geometry works better for the runner. A shoe that looks better on a specification table but does not work with a runner’s mechanics is not the better purchase.

Value pick: Whichever model can be tested before race day or purchased with the better current return policy and price.

Who Should Choose Each Shoe?

Choose the ASICS Metaspeed Sky Tokyo if:

• You tend to lengthen your stride as you accelerate.
• You have previously preferred the Metaspeed Sky over the Edge.
• You want a taller listed racing platform.
• You want ASICS’s FF LEAP and FF TURBO PLUS dual-foam system.
• You prefer a high, relatively flat carbon-plate position.

Choose the Nike Vaporfly 4 if:

• You want one racer for several road-race distances.
• You prefer a lower-profile racing platform.
• You do not identify clearly with ASICS’s stride-style category.
• You already know that ZoomX and the Vaporfly geometry work for you.
• You find a discounted colorway below the standard $270 price.

Final Verdict

The Metaspeed Sky Tokyo and Vaporfly 4 are both elite-level racing designs, but they are not trying to solve the same problem in exactly the same way.

The Metaspeed Sky Tokyo is the more specialized option. Its high, flat plate, dual-foam arrangement, 5 mm drop, and taller stack are specifically organized around runners who increase speed by lengthening their stride.

The Vaporfly 4 is the more general-purpose option. Its full-length ZoomX midsole and curved Flyplate are packaged in a lighter and lower design than the previous Vaporfly, with positioning that spans several road-racing distances.

For a runner who already knows that the Metaspeed Sky geometry works, the Sky Tokyo may be the stronger choice. For someone choosing without that experience, the Vaporfly 4 is the simpler starting point because it does not require selecting a specific stride category.

Neither should be purchased solely from a specification table. Fit, cornering confidence, and how the plate geometry behaves at actual race pace matter more than a small difference in weight or drop.

Compare the Metaspeed Sky Tokyo and Vaporfly 4 side by side on Cadence →

Related Comparisons

• ASICS Metaspeed Sky Tokyo vs Edge Tokyo vs Ray
• Nike Vaporfly 4 vs Adidas Adios Pro 4

Sources

• ASICS Metaspeed Sky Tokyo product page
• ASICS Metaspeed series comparison
• Nike Vaporfly 4 product page