ASICS
Fujispeed 4
ASICS' trail racer combines FF Blast Plus foam with a full-length Pebax plate and ASICSGRIP rubber. Testers found it light, propulsive and grippy on wet rock, but very firm and out of its depth in deep mud.
What's new: ASICS lists it about 15 g lighter than the Fujispeed 3, and Journal du Trail's tester found the upper more durable than the previous version's.
About the Fujispeed 4
ASICS' trail racer for runnable terrain, the Fujispeed 4 is aimed at competitive runners after speed and propulsion, with ASICS saying it is designed for fast movement over rough ground. It launched alongside the Fuji Lite 6, which targets more technical, control-focused running, and sits below the carbon-plated Metafuji Trail 2.
The midsole sandwiches a Pebax plate between two layers of FF Blast Plus foam, and ASICS says the plate redirects energy forward, especially on climbs. An ASICSGRIP outsole with shallower lugs than the Fuji Lite 6 is intended to support both uphill and downhill running, and ASICS states that the shoe was tested at its Institute of Sport Science in Japan. It weighs 240 g in a men's US 9 (UK 8.5), has a 5 mm drop and comes in a standard, unisex fitting, placing it among the brand's trail racing shoes.
Specs and features from asics.com, news-emea.asics.com and our own spec data. A factual overview, not a review.
Video reviews
Watch ASICS Fujispeed 4 reviewsOpens YouTubeWhat the critics say
86/100 review score
- Road Trail Run 8.9/10
The reviews in briefRoad Trail Run's Markus Zinkl rated the ASICS Fujispeed 4 a fast, direct trail racer with superb grip on wet rock and a propulsive plate, but found it very firm at first and poor in deep mud. Journal du Trail's Vincent Gaudin praised its grip too, though his foot slid inside on steep ground.
- Positive: Very light and breathable
- Positive: Excellent grip on wet rock, roots and dry trails
- Positive: Plate gives a lively, propulsive push-off
- Mixed: Wide instep lets the foot slide on steep climbs and descents for some testers
- Negative: Very firm ride that takes time to get used to
- Negative: Flat lugs struggle in deep mud
Paraphrased from published reviews. Read them in full:
The numbers
- Trail
- Type
- 240 g
- Weight
- 34 mm
- Heel stack
- 5 mm
- Drop
- Plate / rods
- Plate
- Neutral
- Support
Weight for a men's US 9 / UK 8.5.
What it feels like
Fit
True to size
Testers found it true to size with a roomy toe box, but the wide instep needs firm lacing to stop the foot sliding on steep ground.
What Reddit runners say
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On TikTok
Fujispeed 4 on TikTokShort reviews and wear tests from runnersWhere to buy the Fujispeed 4
RRP around £160. Tap through for today's price.
ASICS Fujispeed 4
In short
Choose this for trail races up to marathon distance and fast sessions on forest trails and rock. Testers found it very firm and poor in deep mud, so it suits active, efficient runners best.
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