The Asics Megablast and the Asics Superblast 3 are two premium super trainers from the Japanese brand: max cushion, no plate, and a new-generation A-TPU foam. Two very close models, built for training as much as racing, close enough that choosing between them is genuinely hard.
Dimensions are XXL on both sides. The Superblast 3 tops out at 46.5 / 38.5 mm of stack, barely more than the 45 / 37 mm of the Megablast. Both share an 8 mm drop and go without a plate. On weight, the Megablast is the lighter one, at 218 g / 7.7 oz versus 227 g / 8.0 oz for the Superblast 3.
The difference mostly plays out in the midsole. The Megablast bets on a single foam, FlyteFoam Turbo², an A-TPU that Asics presents as its bounciest. The Superblast 3 stacks two foams: FF Leap (the brand’s fastest, the one in the Metaspeed racers) on top, and FF Blast+ underneath for firmness and stability.
The result is similar: a very well balanced feel, leaning plush, with impressive shock absorption and a very fun ride. The Superblast 3 wins on comfort (we score it 10/10 on that criterion), while the Megablast is a hair lighter and more responsive. Both can go the distance up to the marathon — they have their place on race day if you’re chasing a PB.
Both engineered mesh uppers are excellent, comfortable and breathable, though the Megablast is a bit more finicky when it comes to fit. Lastly, the ASICSGRIP rubber outsole delivers very good traction for both shoes.
Megablast or Superblast 3: which should you choose?
We awarded a 9.5/10 to both models, so there is no wrong pick.
For the majority of runners, the Superblast 3 remains our reference: maximum comfort, huge versatility and the dual-foam setup make it ready for any distance. It’s simply one of the best super trainers on the market.
The Megablast is the choice for those who want the lighter, more responsive model of the two. A bit more responsive when you accelerate, it clearly has a place in racing, as long as you accept a higher price and a fit that doesn’t suit everyone.
That leaves price: the Superblast 3 costs about $15 less, is more comfortable and at least as versatile. It offers the better value. The Megablast is for those who value lightweightness and responsiveness first.
