The ASICS Gel Kayano 21 is a premium, daily running, support shoe designed for a moderate to severe overpronated foot motion.


Important Shipping Note: U.S. sales only.


The Asics Gel Kayano 21 celebrates it's 21st birthday in style.  Continuing it's legacy of providing maximum support and a plush ride, this premium daily trainer is ready to hit the roads. With a new lighter Fluid Ride midsole and the most gel cushioning to date, this shoe is built for high mileage training. Along with top  of the line upper technologies to ensure a fit customized to your foot, the Kayano 21 provides a luxurious stable ride from start to finish.

Model Number:

Weight: 11.4 oz (size 9)

Stack Height: Heel (30mm), Forefoot (20mm)

Available Widths: D=Medium, 4E=Extra Wide

How It Fits (based on width D) 

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



  • Rearfoot Gel cushioning system uses a silicone-based gel for responsive shock absorption on impact.
  • Forefoot Gel cushioning system uses a silicone-based gel for responsive shock absorption on impact.
  • Discrete Heel unit is a component of IGS that provides excellent shock absorption in the heel.
  • FluidRide provides responsive cushioning with reduced weight and increased durability.
  • Guidance Line is a vertical flex groove in the forefoot for improved gait efficiency.
  • Dynamic DuoMax Support System reduces over pronation by controlling the movement of the foot, leading to a smoother heel to toe transition.
  • Guidance Trusstic System is a lightweight support system that provides additional torsional rigidity.
  • Impact Guidance System (IGS) design creates a smooth and balanced heel-to-toe transition.


  • ASICS High Abrasion Rubber (AHAR)  in the heel is made of carbon rubber for exceptional durability.
  • DuraSponge Outsole in the forefoot is made from a blown AHAR compound, for responsive cushioning and flexibility.
  • Rear Foot Crash Pad slows the rate of pronation, providing a smoother transition from heel-to-toe.


  • Open mesh on the upper provides breathable coverage.
  • FluidFit consists of multi-directional stretch mesh that provides a personalized, glove-like fit.
  • Personal Heel Fit (PHF) uses a two layer memory foam lining in the heel collar to provide a individualized fit.
  • Discrete Eyelets are independently placed to disperse lace tension and enhance comfort.
  • Reinforced Vamp increases durability through the addition of a thin and seamless mesh overlay.
  • Heel Clutching System uses an exoskeletal structure that wraps the heel for a secure fit.
  • ComforDry Sockliner is made with anti-bacterial material to reduce odor and moisture and provide additional cushioning.
  • Strobel Last with the upper stitched to SpEVA 55 Foam, for enhanced cushioning and a moderately soft underfoot feel.

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: The Gel Kayano 21 is the best athletic shoes I've ever worn. Ever. And at the great sale price here, I bought 5 more pairs! Asics, you've over delivered on my expectations! Thank you!
From: Samson, Woodmere. September 12th 2015

Comments: I've been wearing Kayano's for some time and loved them all but why did Asics decide to make this version just a tad thinner? Now I can't wear them and will be moving to the Saucony Hurricane.
From: Craig, Newport News, VA, USA. May 20th 2015

Comments: This shoe has been designated my "long run" partner for sessions lasting more than 60 minutes. So far I've logged about 25 miles on this shoe, one 11-mile and another 14-mile run. Overall, I'm impressed with the Kayano 21 and think it provides good support when needed and quite comfortable. The first run I found that my heel was sliding a bit during the run, which may be due to a loose tie. The second time around I threaded the top most eyelets of the shoes and it kept my heel secure. I'm impressed with the tread wear so far. On my DS Trainer 20, after about 30 miles I can already notice a bit of wear (nothing to be disappointed about, just noticeable), but not so with the Kayano 21. Size 10.5 weighed in at 12.3 ounces.
From: Anonymous, NJ, USA. February 27th 2015

Comments: Finally got this, and I love it. I'm usually running in a much lighter shoe (Nike LunarGlide 6), but took this for 4mi while I was helping someone train and I didn't notice the weight nearly as much as I thought I would. Great support for my flat feet (still haven't put my Aetrex L420 in them, though) and cushion for my bad knees (thanks, genetics). Also, the all black par looks like a shoe Batman would wear, so bonus.
From: Joel, Estero, FL, USA. January 1st 2015

Comments: Love this latest version of the Kayano! Awesome and comfortable shoe.
From: Shawn, Aurora, CO, USA. November 4th 2014

Comments: Got these to rotate with my Hurricane 16's. On my first run I found that the heel was very soft and overall the feel of the shoe was really mushy. Guess I'm not used to such a super soft shoe. Returned for another pair of Hurricane 16's-great Running W/H exchange policy! The Hurricanes have a firmer heel, but still have great forefoot foot cushioning. Building my long runs up to 13-14 miles as I run half marathons. I am a moderate pronator with flat arches and weigh 160 lbs.
From: Mac, New Orleans, LA, USA. September 23rd 2014

Comments: Just tried these today for a run and wow; for me the best kayano since the 10. The shoe is better cushioned than the nimbus and it hugs the foot in a way that it hasn't in years. The posting isn't noticeable so it feels like a stable neutral shoe. Asics hit a grand slam and I say this being unhappy with many of the shoes during the last several years.
From: Fred, Burnaby, BC, Canada. September 6th 2014