Asics Fuji Speed 4

Asics Fuji Speed 4 review: what runners say

Fit

True to size, trending roomy in width. Well-padded heel collar and lace-to-lace system deliver acceptable lockdown, but the reduced number of lace passes leaves less tension than a traditional lacing setup.

Feel

Direct and responsive ride, with FF Blast+ providing energy return without pronounced cushioning. The foam-plate combo (Pebax) produces a stiff, fast response — poorly suited to easy paces or long outings.

Durability

AsicsGrip outsole with 3.5 mm lugs: good durability on soft and packed surfaces, accelerated wear on rock and abrasive terrain. Expected mileage not quantified by sources.

Best for

Short, fast races on fast-running terrain: gravel, hardpack trails, vertical. Not suited to technical ground, deep mud, or long outings beyond 90 minutes.

Weak points

Stiffness perceived as excessive on descents and at moderate paces. Lace-to-lace system criticized by multiple sources for insufficient tension compared to traditional eyelets.

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