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Supple, roomy and light describe the upper of the K-Ruuz. Miminal, fast and quick-drying describe the function of the K-Ruuz. Thus, the K-Ruuz is best suited for racers with wider or high volume feet that are running any road distance in hot conditions. Is also suitable for neutral pronation or mild over-pronation.

Model Number:

Weight: 7.1 oz (size 9)

Stack Height: Heel (21mm), Forefoot (11mm)

How It Fits (based on width D) Width D=Medium

  • Sizing: Fits large; purchase 1/2 size smaller than standard running shoe size
  • Heel: Medium
  • Midfoot: Full to medium volume
  • Forefoot: Medium width
  • Toe-Box height: High
  • Arch Structure: Low height

Product Lifecycle

  • Release date: July 2010
  • Model discontinued: Unknown

INTRODUCTION

The K-Swiss K-Ruuz is a minimum feature, minimum support shoe designed for speedwork and racing. It is built with a semi-curved shape.

CUSHIONING

  • K-EVA is a blend of EVA engineered to enhance cushioning and durability of the midsole.
MIDSOLE
  • K-EVA is a blend of EVA engineered to enhance cushioning and durability of the midsole.
  • Dual Density Post is located at the medial midfoot and is a higher density foam intended to reduce the rate of pronation.
  • TPU Insert is located at the bottom of the midfoot and is a thermoplastic unit designed for a smooth heel to toe transition.
UPPER
  • Open Mesh covers the entire upper and allows moisture and heat to escape from within the shoe.
  • Flow Cool is located at the heel and toe and are perforations in the synthetic material designed for moisture management.
  • Five Stripe Overlays are used at the medial and lateral sides of the upper and are designed to keep the upper snug to the foot.
  • Drainage holes are located along the center of the midsole and are intended for water drainage.
  • Traditional Sockliner
  • Traditional Last
OUTSOLE
  • Aosta II is utilized at the heel and is a high density rubber designed for outsole longevity.
  • Blown Rubber is positioned at the forefoot and is a lightweight rubber intended for flexibility.

Comments: Great shoe, light, responsive and generally comfortable.  The only issue is that the shoe rubs uncomfortably near the bottom of the laces.  A little body glide and it's fine, but definitely pulled a blister the first time out (not since with precautions).
From: Terry, Richmond, VA, USA

Comments: I think this offering from K-Swiss is remarkable.  I normally train in racing flats (my last training shoe what the Asics Hyperspeed) and have been eagerly awaiting the release of this shoe since seeing it at the K-Swiss booth at the Denver Marathon Expo.  What I like most about this flat is the one piece midsole/ outsole, i.e., it remains in constant contact with the ground and, as a midfoot striker; I rarely find shoes like this.  It seems most companies adhere to what has largely become an industry standard of cutting away the outsole and distinctly separating both the forefoot and heel.  Why shoe companies remove the very portion where most people strike the ground naturally is beyond me.  The upper is extremely breathable and I find the heel and midfoot to be rather snug and form-fitting while a slightly wider forefoot allows for a very natural foot plant.  The shoe is very flexible and offers a surprising amount of cushion given its weight˜a result on the strobel piece, I believe, which features a layer of K-Swiss‚ Superfoam.  Looking forward to the late season 2010 releases like the Blade-Light series.
From: Darren, CO, USA

Footwear Performance Characteristics

Pronation Control: What's This?

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

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

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