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Buyer's Guide

ASICS Megablast Review & Sizing Guide

Published Updated

Buy the ASICS Megablast at retail only if you need a 600-1000 mile super trainer for marathon training and you can absorb the $225 price; skip it for a fun bouncy tempo shoe and consider the Superblast 3 or Adidas Evo SL instead at lower price tiers the price, $225. For the price and hype I was expecting a lot and it hasn't met those high expectations.

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Key facts

Weight & stack
8.1 oz / 230g at M9; high-stack super trainer; no plate.
Foam
ATPU-based midsole compound; dense rather than bouncy by owner consensus.
Use case
Marathon training, daily mileage at 8:30-6:50/mile range, long runs.
Durability
Owners report 600-1000+ miles before the foam goes dead.
Fit
True to size length; upper is the line's weak point with frequent blister reports.
Caveat
$225 retail is the highest in the ASICS super-trainer line; not a wide-pace shoe.

Full breakdown

ASICS Megablast is the heavier, taller super trainer above the Superblast: 8.1 oz at men's 9, ATPU-based foam, high stack, no plate, and a dense feel that splits owners between fun and muted. The 211-comment 200-mile review documents an outstanding outsole that resists midfoot wear past 200 miles but flags an abrasive upper and a $225 price that is hard to justify against the Evo SL durability is absurd so far. At 200 miles there's no major wear and the section that I normally chew through (left shoe lateral midfoot) is untouched. Buy it for long marathon training blocks; skip it if you want a fun, bouncy tempo shoe.

FAQ

Megablast or Superblast — which should I choose?

Choose the Megablast for marathon training mileage where comfort and durability matter more than versatility; choose the Superblast 3 for a lighter, more versatile shoe at $200 instead of $225. The 211-comment Megablast review explicitly says the shoe is a goldilocks-pace tool in an 8:30-6:50/mile window and a master of none, which is the trade-off the price asks you to accept it works best in (wider) goldilocks range of like 8:30-6:50 mile pace. Wait for sale on either if you already own a comparable super trainer; the gap between them is narrower than the price suggests.

Does the Megablast really last 600-1000 miles?

Yes, multiple owners report 600-1000km before foam death, with no significant outsole wear at 200 miles. The 99-comment 1000km review documents the ride staying coherent past the typical 400-500 mile super-trainer cutoff, and the 53-comment 440-mile review echoes the same durability arc Asics Megablast - 1000km review. Buy it if your goal is a single shoe for a 16-20 week marathon block; rotate with a softer daily past 600 miles to extend the foam, and treat the outsole as the line's strongest selling point.

How is the Megablast upper, and will it cause blisters?

The upper is the Megablast's weakest part; it is described as abrasive and several owners report blisters and pinky-toe rubbing across long runs. The 200-mile review specifically calls it the only shoe where the owner has needed bodyglide on long runs to prevent rubbing, and another commenter reports needing to tape the pinky toe to avoid hot spots this is the only shoe where I've actively gotten blisters multiple times. I've started using bodyglide on my feet with the megablast. Try in store before committing at $225; sock choice and pre-run lubrication help, and runners with sensitive pinky toes should skip.

Is the Megablast bouncy and fun, or muted and dense?

Owners split — some love the ATPU bounce, others find it dense and muted relative to the marketing. The 200-mile review describes it as a higher-stack amalgam of the Novablast 5, Mach 6, and Glycerin Max rather than a true bouncy super trainer, and a top commenter calls the ride genuinely fun and bouncy to me it feels like a solid, dense, somewhat firm daily trainer. Try the shoe in person if you can; the polarizing ride means the only safe online buy is one that returns easily.

Should I wait for the next-gen Megablast or buy now?

Buy the current Megablast if you have a marathon block starting and need the durability now; wait if you can train through the next 6 months in something else and watch for ASICS's response to the Dynafish Xiaonian and Adidas Evo SL price pressure. The 200-mile review thread is explicit that the Megablast feels expensive relative to competitors, and a top commenter calls out the Dynafish as a better-built alternative The Dynafish Xioanian is everything it should be, given the resources ASICS have. Sale windows are short on the Megablast; if you wait, set a price alert on retailers.