Sale: $ MSRP: $

A smooth-riding and nimble trainer with a performance edge, the Karhu Flow3 Trainer Fulcrum features minimal cushioning and a firm ride.



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.

Model Number:

Weight: 7.3 oz (size 8)

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

Available Widths: B=Medium

How It Fits (based on width B)

  • Sizing: Standard running shoe length
  • Heel: Medium
  • Midfoot: Medium volume
  • Forefoot: Medium
  • Toe-Box Height: Medium
  • 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.

Footwear Performance Characteristics

Pronation Control: What's This?

  • Neutral
    • Min
    • Mod
  • Support
    • Min
    • Mod
    • Max
  • Motion Control
    • Mod
    • Max

Heel-Toe Offset (mm): What's This?

  • 0
  • 1-2
  • 3-4
  • 5-6
  • 7-8
  • 9-10
  • 11+

Stack Height:

  • Barefoot
  • Minimal
  • Low
  • Medium
  • High
  • Maximal


  • Road
  • Road-Trail
  • Hard Trail
  • Varied Trail
  • Soft Trail

Shoe Type:

  • Premium
  • Standard
  • Performance
  • Racing

Customer Reviews

Comments: I love the Karhu Flow3 Trainers. I've been using this shoe for the past year for the majority of my training miles. I've found it to be comfortable and durable. When I first started running in these shoes, I definitely noticed the fulcrum technology helping me shift my foot strike forward. Now it's just been ingrained in my running style. The shoe itself is extremely durable and after hundreds of miles, the shoe doesn't show any wear in the upper. (Other than accumulated dirt). Plus it was nice that the size in the tongue didn't instantly wear away. So no need to stress about what size I've been wearing. I know. Also, for the first time ever, I also managed to be injury free the whole season. Definitely an awesome shoe! Plus I love all the colors.
From: Meredith, Austin, TX, USA. 2/12/14