Why I'm Choosing the ASICS Megablast Over Carbon for My Next Race
The ASICS Megablast is the fastest plate-free racing shoe available right now, delivering 73% energy return through FF TURBO2 foam without a carbon plate in the stack. After 20 years of endurance racing in performance trainers, this was my first step into super shoe foam, and I chose the one without the plate.
What Is the ASICS Megablast and What Makes It Different From Carbon-Plated Shoes?
The ASICS Megablast uses FF TURBO2 foam, an aliphatic TPU that ASICS claims is 33% more responsive than their previous FF Turbo compound and approximately 10% softer at contact, without any carbon plate. Lab testing confirmed 73% energy return at the heel and 73.8% at the forefoot. Standard EVA trainers return roughly 55 to 60%. The Megablast closes most of that gap without asking you to adapt to plate mechanics.
Carbon-plated shoes, like the Saucony Endorphin Pro 4, embed a rigid plate in the midsole to create a propulsive snap at toe-off. That plate creates a specific load on your calves, achilles, and forefoot that is different from what your body has adapted to in standard trainers. Transition time matters. Going from zero miles in a plated shoe to racing in one, with no training adaptation, is a variable you do not want to introduce on race day.
The Megablast was built for ASICS's Tokyo Collection for the World Athletics Championships in 2025. This is not a daily trainer dressed up as a race shoe. ASICS built it to compete. The 45mm heel and 37mm forefoot stack at 8mm drop, combined with the 7.9-ounce weight, is a remarkable package for a plate-free shoe.
How Does the ASICS Megablast Compare to the Saucony Endorphin Pro 4?
The ASICS Megablast weighs 7.9 ounces with a 45mm heel and 37mm forefoot stack at an 8mm drop and costs $225. The Saucony Endorphin Pro 4 weighs 7.7 ounces with a 39.5mm heel and 31.5mm forefoot stack at an 8mm drop and costs $220. On paper, the Endorphin Pro 4 is marginally lighter. In practice, the Megablast carries 5.5mm more heel cushion, which translates to meaningful impact protection over the back half of a marathon.
The Endorphin Pro 4 is a legitimate race shoe. It uses a dual midsole system, PWRRUN HG on top and PWRRUN PB underneath, with an S-shaped carbon plate embedded in between. Saucony's Speedroll technology creates a rolling sensation at toe-off that favors heel strikers. The issue for most runners is not whether it is fast. It is whether you have prepared your body for what a stiff carbon plate does to your gait.
For me, 20 years of mileage in standard and performance trainers but zero miles in carbon, the choice was straightforward. The Endorphin Pro 4 is an unknown variable. The Megablast gives me the foam upgrade with a familiar ride profile.
Is the ASICS Megablast Fast Enough to Race a Marathon?
Yes. Reviewers describe the Megablast as excelling at uptempo running and extended efforts, which aligns exactly with marathon and ultra-distance conditions. The 73% energy return rate is competitive with plated shoes in the category. At a 5K or track race, you would want something more mechanically aggressive. At 26.2 miles, a shoe that delivers consistent energy return and cumulative impact protection across every single footstrike is what wins.
The key metric is not just energy return but energy return over time. Carbon plates perform optimally in a specific window that depends on your stride mechanics and pace. If your pace drops in miles 20 through 26, the plate advantage narrows. The Megablast's foam-driven energy return is more consistent across a broader pace range, which is where most marathon runners actually live in the back half of a race.
| Shoe | Weight (M) | Heel Stack | Fore Stack | Drop | Plate | Foam | Price |
|---|---|---|---|---|---|---|---|
| ASICS Megablast | 7.9 oz | 45mm | 37mm | 8mm | None | FF TURBO2 | $225 |
| Saucony Endorphin Pro 4 | 7.7 oz | 39.5mm | 31.5mm | 8mm | S-Carbon | PWRRUN HG + PB | $220 |
Why ASICS Has Always Worked for My Feet and Why the Megablast Is a Natural Next Step
I have flat feet and overpronate. I have been running with that combination for over 20 years. Across all those miles and dozens of shoe models, ASICS has consistently been the most reliable fit for my mechanics. The ASICS geometry accommodates the way my foot loads and unloads. Their stability shoes, like the Kayano line, manage my pronation without overcorrection. Their performance trainers provide the fit consistency I need to trust a shoe in a race situation.
The Megablast is a different category, a true super shoe foam experience, but it still fits the way ASICS fits. Predictable heel geometry, reliable midfoot structure, and a forefoot that does not fight your toe-off. That consistency is what 20 years with a brand earns you. You know how the shoe will behave in the back half of a hard effort because you have felt their foam under your feet enough to trust the progression.
Stepping into the Megablast was not a leap. It was a natural next step in a long line of equipment decisions that have always pointed back to ASICS.
If you are building toward a goal race, the Salt trucker from Salt Outfitters goes on before the first rep and comes off when the work is done. That is the whole vibe.
Who Should Choose the Megablast Over a Carbon-Plated Shoe?
Runners who have never trained in carbon, runners who want a higher stack for impact protection at long distances, and runners who land at midfoot or heel rather than forefoot will get more out of the Megablast than a standard carbon shoe. Carbon plates reward a particular stride geometry and become inefficient when your form breaks down late in a race.
If your training has been in standard performance trainers and you want to step up to super shoe foam without introducing new mechanical demands on race day, the Megablast is the rational bridge. You get competition-level cushion, 73% energy return, and a shoe ASICS built for the World Athletics Championships, without asking your achilles and calves to adapt overnight to a completely different force profile.
Your race is earned long before the start line. Gear up for it. Earn Your Salt.
Frequently Asked Questions
Does the ASICS Megablast have a carbon plate?
No. The ASICS Megablast does not have a carbon plate. It uses FF TURBO2 foam, an aliphatic TPU midsole that delivers 73% energy return without any embedded plate. ASICS positioned the Megablast as a plate-free alternative that competes with carbon shoes on energy return and race-day performance through foam technology alone.
How does the ASICS Megablast compare to carbon-plated racing shoes?
The ASICS Megablast weighs 7.9 ounces with a 45mm heel stack and returns 73% of energy through FF TURBO2 foam. Carbon-plated shoes like the Saucony Endorphin Pro 4 use a rigid plate in a dual-layer midsole to create a propulsive snap at toe-off. The Megablast carries more cushion and delivers its energy return through foam rather than plate mechanics, making it more forgiving for runners without plate training experience.
Is the ASICS Megablast good for marathons and ultras?
Yes. The Megablast was built for competition at distance, released as part of ASICS's Tokyo Collection for the World Athletics Championships. Its 45mm heel stack provides significant impact protection, and FF TURBO2 foam maintains energy return throughout a full race distance. Multiple reviewers note it excels at uptempo efforts and longer distances.
Why choose the ASICS Megablast over the Saucony Endorphin Pro 4?
The Megablast is the better choice for runners who have not trained in carbon-plated shoes and do not want to introduce plate mechanics on race day. The Endorphin Pro 4 is a legitimate race shoe, but its S-carbon plate and Speedroll geometry create a specific mechanical demand without prior adaptation. The Megablast gives you the foam performance upgrade without that unknown variable on race day.
What is FF TURBO2 foam and how does it work?
FF TURBO2 is ASICS's latest aliphatic TPU foam, engineered to be 33% more responsive than their previous FF Turbo compound and approximately 10% softer at initial contact. The molecular structure stores energy during heel and midfoot compression and releases it at toe-off, similar to how carbon plate shoes create propulsion. The result is 73% energy return at the heel and 73.8% at the forefoot.
Is the ASICS Megablast worth $225?
For runners who want super shoe foam performance without committing to a carbon plate, yes. The Megablast at $225 sits at the same price point as the Saucony Endorphin Pro 4 at $220 and well below the Nike Vaporfly 3 at $260. ASICS built it as a competition shoe for the World Athletics Championships, and the price reflects the performance category you are buying into.