The Inov-8 Trailroc 255 is a versatile trail running shoe designed for a neutral foot motion, ideal for racing and daily training.



The Inov8 Trailroc 255 packs just enough foam underfoot for long miles on rugged trails, yet keeps a low and nimble feel. With a 6mm drop from heel-to-toe, this shoe promotes a mid to forefoot landing for a smooth and stable ride. The durable outsole uses 3 types of sticky rubber for excellent hold on dry and rocky trails.

Model Number:

Weight: 9.9 oz (size 9)

Stack Height: Heel (22mm), Forefoot (16mm) 

Available Widths: D=Medium

How It Fits (based on width D)

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


  • 2 Arrow Shoc-Zone provides moderate underfoot cushioning and a 6 mm heel-to-toe drop. This is Inov8's medium level of cushioning on their 0-4 arrow scale.
  • Injected EVA Foam for resilient cushioning with maximum memory retention.
  • Meta-Shank extends from the midfoot to the forefoot in a 5-finger fashion, for flexible underfoot impact protection.
  • Trailroc is a trail outsole built with a moderately aggressive lug pattern. It is intended for use on hard packed trails and mixed terrain.
  • Tri-C Compound combines three different outsole rubbers for excellent grip and decreased wear.
  • Soft Sticky Rubber for optimal performance and maximized grip in wet conditions.
  • Hard Sticky Rubber for optimal performance, grip in wet conditions, and increased endurance.
  • Endurance Rubber for increased durability and grip on mixed terrain.
  • Synthetic Mesh covers the upper for lightweight, breathable coverage
  • TPU Lacing System uses TPU lacing supports for a strong, lightweight and secure fit.
  • Met-Cradle is a synthetic webbing upper that supports the forefoot and provide a secure fit.
  • 6mm Footbed for additional underfoot comfort.
  • Anatomic Last follows the natural shape of the human foot for a close and comfortable fit.

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: Great grip on wet and dry ground and all kind of surfaces. Not that comfortable on asphalt - but that's not what they were designed for. Not much of a chance of bruising because of the substantial rock plate (but the shoes are not very flexible as a result - at least compared to others). Heel cutout is very, very low - at least on my foot, that leads to heel slippage even if I lace lock. Haven't found that to be a problem though. The one real negative in my book: they run HOT! So much so that I don't want to wear them if the temperature is above 50. And once they are soaked with sweat, they don't drain well...and as a result, end up being much heavier 10 miles in than they were at the start. Might not be an issue for you if you don't sweat much... 
From: Bernie, Round Rock, TX

Comments: I bought these shoes 10 days before running the Firetrails 50 (my first ultra). I was concerned about wearing a new shoe on a long run like that. Not only did I finish, but my feet were feeling great. I had no blisters and no black toe nails. I think these are an awesome pair of shoes. The shoes do not have any support, but I cinch down the the laces.  This held my feet in the shoe very nicely. I had no problems with bruises because of rocks or anything. I could recommend these shoes to anyone interested. 
From: Blake, Clovis, CA, USA

Comments: I took the 255 Trailroc to a 20 mile run in Joshua Tree national park by the mojave desert and I was amazed how it performed on rugged terrain. Despite I am used to the 4mm drop of the Salomon Sense and its light weight, the trailroc likes to go fast as well. Its very forgiving towards sharp rocks and I just breeze thru them with ease. I love the phenomenal grip the outsole exhibits towards very loose,sandy and muddy trail. The MetaFLEX actually makes the shoes very flexible and easy to run on midfoot/forefoot despite being smoked during uphill and through fatigue by the miles my legs were in. I bought this as training shoe for the Salomon Sense and surprisingly it amazed me even at the first time I ran with it. It seemed to me that I dont need to break it in and my feet just readily adapt to them.  INOV8 really stresses out on its workmanship and I would take their shoes any day even sundays than the new balance minimus. The uppermesh is designed so well that I never felt any debris inside my shoes. No hot spots felt despite the gnarly downhill. It feels a little heavy but since it promotes natural running, it still feels fast.I would definitely recommend this shoes.
From: ED, California, USA