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RX8 Wide Mountain Bike Shoe - Men's

5 out of 5 stars
1 Review

Out of Stock

Don't worry though, we have a lot more Mountain Bike Shoes in stock than that.

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Why We Like The RX8 Wide Mountain Bike Shoe

Because gravel is still an emerging segment, some riders find themselves struggling with footwear choices—especially for racing. Mountain bike shoes offer great walkability, but are often too heavy and overbuilt. This leads many riders opting for lightweight road shoes with ultra-stiff soles that boost pedaling efficiency, but the lack of tread is not ideal for the inevitable hike-a-bike sections found in gravel race events and adventurous rides. Shimano addresses these problems by combining the best characteristics of their high-end road and mountain footwear into one shoe that's specifically designed for gravel racing. Lightweight and stiff, but with grippy outsoles and just enough toe flex to be comfortable to walk in, the RX8 might just be the best option out there for dedicated gravel enthusiasts. This wide version provides an alternate fit to best suit your feet.


  • Featherweight shoes designed for gravel bike racing
  • Carbon composite sole ensures maximum pedaling efficiency
  • Wide last provides an alternate fit
  • Lugged rubber outsole adds grip for hike-a-bike
  • Reinforced heel cup for stability under hard pedaling
  • Boa dial and toe strap make it easy to get the right fit
  • Perforations in the upper let your feet breathe
  • Wider cleat-to-pedal interface is optimized for XTR M9100 pedals
  • Item #SHI00OO
Upper Material
synthetic leather, mesh
Boa IP1
high-density insole with adaptable arch pads
[sole] carbon fiber composite, [outsole] abrasion-resistant TPU lugs
Cleat Compatibility
Claimed Weight
Manufacturer Warranty
1 year

Overall Rating

5 based on 1 ratings

Review Summary

1 Stars - 0 reviews
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5 Stars - 1 reviews

Fits Small

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5 out of 5 stars

August 19, 2021

Great shoe, inaccurate size chart

I've put it through the wringer
Size Bought:
6' 3"

Just ordered my 2nd pair of these shoes after 1.5 years on the first pair which are still very useable after extensive use but showing wear on toes. Regarding size chart, I use footwear in the 11.5 to 12.0 range (US). I wear size 46 for my Sidi road shoes and Specialized MTB shoes. No way my foot fits into a 46 for the Shimano RX8. But the 48 is great! Pros: Great comfortable fit (these shoes feel great!), excellent power transfer, feet never fatigue or get too hot (e.g., 90+ degree rides in the Sonoran desert). The shoe is a perfect interface between my foot and the pedal. Cons: On occasion when having to hike my gravel bike through deep, soft sand (like this morning), said sand readily infiltrates through the ventilation holes! I can deal with this (empty the shoe!) better than hot feet! I am a bit disappointed with (what I perceive as premature) wear at the base of the toe but these shoes are not used on a road bike where they would never see a rock!

Bill Z