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The Karhu Flow3 Trainer Fulcrum is a nimble neutral shoe with a performance edge. Utilizing Fulcrum technology to promote an efficient ride, this lightweight yet durable shoe is a versatile option suitable for training, racing, and everything in between.

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Weight: 8.3 oz (size 9)

Stack Height: Heel (18mm), Forefoot (13mm)

Available Widths: D=Medium

How It Fits (based on width B)

  • Sizing: Standard shoe size
  • Heel: Medium
  • Midfoot: Medium volume
  • Forefoot: Medium
  • Toe-Box Height: low
  • Arch Structure: Medium
  • Shoe Shape: Semi-Curved


The Flow3 Trainer Fulcrum is a moderate featured, minimum neutral shoe designed for training and racing.


  • CMEVA is compression molded EVA which is an industry standard midsole material designed to offer durable cushioning.


  • Fulcrum is a high durometer EVA wedge located from the heel to the midfoot. It is engineered to promote an efficient heel to toe transition by converting heel strike energy into forward momentum.


  • Open Mesh is utilized throughout the entire upper and provides breathability.
  • Welded Overlays around the midfoot support the contours of the foot for a snug and supportive fit.
  • Reflective Details increase visibility in low-light conditions.
  • Traditional Sockliner provides contoured support and cushioning.
  • Strobel Last with the upper stitched to a full length EVA board for a comfortable underfoot feel.


  • Wearable EVA Outsole with Compression Molded Rubber in key areas for optimal durability and shock absorption.

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