ASICS Magic Speed 4 Review: Corrected Specs and Plate Caveat

ASICS Magic Speed 4 Review: Corrected Specs and Plate Caveat

Disclosure: TrainingPlan has not hands-on tested this exact model. This research-based review uses exact-model ASICS material and independent testing. As an Amazon Associate, we earn from qualifying purchases.

Check the verified Magic Speed 4 listing on Amazon →

Quick Verdict

The ASICS Magic Speed 4 is a superseded high-stack performance trainer released in July 2024. ASICS specifies an 8mm drop and a men's reference weight of 8.6 ounces, while its regional technical sheet lists 245g for men and 205g, or about 7.2 ounces, for women. Those figures replace the materially wrong 5mm and 7.9/6.7-ounce values previously published here.

Its best role is faster road training, uptempo long runs, and longer races for neutral runners who tolerate a stiff rocker. It is less persuasive for relaxed daily miles. The MSRP: $170 launch price remains lower than many flagship racers, but Magic Speed 5 now supplies the current-generation comparison.

Key Specifications

What Changed

This audit changed more than rounding. The catalog had described a lighter, lower-drop, moderately cushioned shoe. ASICS's US page instead specifies 8mm and 242g/8.6oz, while the regional technical sheet supports the women's weight and the FF BLAST PLUS/FF TURBO construction.

Stack requires context. Doctors of Running reports 43.5/35.5mm as full-shoe geometry, coherent with the 8mm drop. ASICS New Zealand prints 36/29mm, apparently under a different construction convention. The catalog uses the full-shoe pair and records both. ASICS US calls the plate “sculpted carbon,” while the New Zealand sheet says “carbon-infused TPU.” We therefore describe it as plated and do not silently upgrade the material to pure carbon fiber.

Ride and Intended Use

The tall foam package is protective, but independent testers characterize it as firmer and stiffer than its height suggests. The plate, forefoot FF TURBO insert, pronounced rocker, and ASICSGRIP outsole make most sense when turnover rises. Tempo runs, marathon-pace work, intervals longer than short track repetitions, and race efforts from roughly 10K through marathon are its credible range.

At easy pace the rigid forefoot and narrow midfoot can feel clunky. It is not automatically a safe everyday choice just because ASICS calls it a trainer. Use choosing running shoes to prioritize comfortable mechanics over the presence of advanced foam or a plate.

Fit and Sizing

Doctors of Running found true-to-size length with a tapered distal forefoot and secure midfoot. The upper has useful volume, but standard width is the only documented US option. A runner with a broad forefoot should not assume that extra length will solve lateral pressure.

The thin heel structure and nontraditional stiffness also deserve a short trial before a key workout. Compare the fit directly with the lighter ASICS Magic Speed 5 rather than assuming adjacent generations feel alike.

What Works Well

Magic Speed 4 combines substantial underfoot protection with credible pace range and a lower launch price than most elite racers. Doctors of Running also reported strong outsole wear after its test mileage, which supports the catalog's high durability classification more than the former unsupported “less durable” warning.

For a runner who prefers firm rather than marshmallow-soft super shoes, its controlled rocker can be a feature. It can preserve a flagship racer for competition while still rehearsing a stiff plated sensation in training.

Tradeoffs

The tall, relatively narrow neutral platform is less stable than the stack number alone implies. Tight turns, uneven shoulders, and slow running can expose that geometry. The tapered toe and stiff forefoot are also meaningful fit and preference constraints.

No review can promise a mileage lifespan. Inspect rubber, upper hold, and changes in ride; when to replace running shoes explains the practical signals.

Who Should Consider This Shoe

Consider it if you want a firm plated workout shoe, plan longer tempo or race-specific sessions, and can buy exact version 4 stock at a real discount. It particularly suits runners who find very soft racers unstable or vague.

Who Should Look Elsewhere

Look elsewhere for a flexible daily trainer, wide sizing, a low platform, or a very soft race feel. The unplated New Balance FuelCell Rebel v4 is more flexible, while the Saucony Endorphin Speed 4 uses a less rigid nylon plate.

Cross-Brand Comparison

Endorphin Speed 4 is lighter-feeling and more adaptable at ordinary pace. Magic Speed 4 offers a taller, firmer platform and more explicitly race-oriented stiffness. Neither is universally faster; fit, pace, and rocker preference decide.

Same-Brand Comparison

The ASICS Superblast 2 is unplated, broader in purpose, and more expensive. Magic Speed 5 reduces stack and mass, shifting back toward shorter, sharper work. Version 4 is the more protective long-workout option.

Value

At MSRP: $170 launch MSRP, it undercut flagship racing shoes. As superseded stock, it should now cost meaningfully less than Magic Speed 5. The linked Amazon ASIN and title were exact-model verified on August 25, 2026, but price and availability remain dynamic; confirm version, size, seller, and returns at checkout.

Final Verdict

Magic Speed 4 is accurately a 43.5/35.5mm, 8mm-drop plated performance trainer weighing 8.6/7.2 ounces by the catalog references. It is durable and capable at faster paces, yet firm, tall, and fit-sensitive. The correction turns it from a generic lightweight carbon shoe into the specific long-workout tool it actually is.