Sale: $ MSRP: $

Sitting in between traditional and minimal, the Inov-8 Road-X-Treme 188 is a low profile trainer featuring minimal cushioning and a firm ride.



The Inov-8 Road-X-Treme 188 offers a low profile running experience while retaining underfoot protection from the ground. A 6mm offset promotes a forward footstrike, and an injected EVA midsole provides responsive and resilient cushioning. The upper consists of a lightweight and breathable mesh and offers an roomier, anatomical fit to allow for natural toe splay.

Model Number:

Weight: 7.3 oz (size 8)

Stack Height: Heel (20mm), Forefoot (14mm)

Available Widths: B=Medium

How It Fits (based on width B)

  • Sizing: Standard running shoe length
  • Heel: Medium
  • Midfoot: Medium to high volume
  • Forefoot: Medium
  • Toebox Height: High
  • Arch Structure: Low
  • Shoe Shape: Semi-Curved


The Road-Xtreme 188 is the women's version of the Road-Xtreme 208 men's shoe. It is a minimum feature, minimum neutral shoe intended for training and racing.


  • 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.


  • 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.
  • Anatomic Last follows the natural shape of the human foot for a close and comfortable fit.


  • Road-X-Treme is a lightweight outsole intended for road racing, speedwork, and everyday training.
  • Sticky Fusion Compound is a mix of synthetic rubber and EVA foam for a smooth ride and grip on the road.
  • Meta-Flex groove is located at the forefoot to encourage natural forefoot flex during toe-off.

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 purchased the Inov-8 Road X-Treme 188s about three weeks ago and have used them for runs from 3 to 15 miles. I really enjoy this shoe. About me/my feet: I have a narrow foot w/a high arch. I have been slowly transitioning over the past two years to more minimal shoes (drop and features). I run about 40 miles a week. The Shoes: This will sound weird but these shoes feel better when you run in them than when you are just wearing them around. Hard to explain but when I got them and first tried them on I wasn't too exited but I am impulsive so I took them out for 5 miles... and I really, really liked how they rode. They are firm but not jarring; it was easy to make adjustments in the shoe and after my first run there were no blisters, hot spots, nothing. If you like a cushioned ride/shoe this is probably not the shoe for you -- even though it offers the most cushion of the Inov-8 Road line. The sole is interesting as there is no real individual treads or pattern. It's basically smooth and flat. Not sure how that affects the ride, if at all, but thought I would mention it. The shoe fits great in the heel and has ample room in the toe-box. Again, I have a narrow foot but despite the wide toe-box the shoes have a snug fit parts that count. The lacing system on the shoes works well and helps keep them comfortable around my foot and they stay tied. Also, the shoes seem well constructed. While they are pretty light, they are far from flimsy. It is probably my gait (which isn't the most efficient) but if I could make one change, I think I might like a bit more cushion in the forefoot. Not sure I have my design concepts correct but could this be done with a lower drop? Overall: Again, I really, really like this shoe. It might not be my "go to shoe" for long runs (15+) but I really like it for anything from 3-12 miles. Smooth and comfortable. I am surprised more people aren't getting on-board with Invo-8!
From: Meghan, Boston, MA