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RC903 S-PHYRE Wide Cycling Shoe - Men's

4.6 out of 5 stars
5 Reviews


Size Chart


Why We Like The Shimano RC903 S-PHYRE Wide Cycling Shoe

The race-engineered Shimano RC903 S-PHYRE Wide Cycling Shoes feature the same high-performance technology as its regular width version, but with a wider fit for riders who seek a bit of extra space. Using DYNALAST technology, a proprietary last built specifically for wide-width shoes, you are provided with a fit that conforms to the natural contours of your foot to allow for a smooth, efficient upstroke. An anti-twist heel cup in the shoe's footbed stabilizes your heel when you put down max watts, while its optimum stiffness levels maximize your power transfer and reduce energy loss.


  • Wide width cycling shoe engineered for race day
  • Wrapped in a 360º micro-fiber leather upper
  • DYNALAST wide-width technology provides natural fit
  • Dual BOA Li2 dials offer secure fit with zero hot spots
  • Anti-twist heel cup locks foot in optimal position
  • A refined toe box reduces tension in the lower legs
  • 3-bolt, SPD-SL pedal platform efficiently transfers power
  • Item runs small, so we recommend sizing up for best fit
  • Item #SHIU1GN
Upper Material
reinforced micro-fiber leather upper, perforated venting
dual BOA Li2 dials
anti-twist heel cup
seamless structure
TPU (cover)
Cleat Compatibility
SPD-SL, 3-bolt
Claimed Weight
[size 42] 8oz (225g)
Manufacturer Warranty
1 year
road cycling

Overall Rating

4.5 based on 3 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 0 reviews
3 Stars - 0 reviews
4 Stars - 2 reviews
5 Stars - 1 reviews

Fits Slightly Small

Screen reader users: the following list provides a visual scale to illustrate the product fit. Please refer to the heading above for the fit type in text.
Runs smallTrue to sizeRuns large

What do you think about this product?


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5 out of 5 stars

June 7, 2024

Shimana S-Phyre

I've used it several times
Size Bought:

Great cycling shoes and quick shipping from Backcouontry!

Jeff L.
4 out of 5 stars

May 16, 2024

Shoes run Narrow

I've used it once or twice and have initial impressions
Size Bought:
44 Wide
5' 11"

I wear a 44 in almost all Shimano shoes but went with 44 Wide and they fit well. Also tried a 45 but they were too long. Hope this helps.

kco4805912 k
4 out of 5 stars

May 4, 2023

Disappointing - Wides only in full size

I returned this product before using it
Size Bought:
5' 7"

These seem to be nice shoes and well made. For $450 they should be! Also for $450 I would expect the wide version to be available in half sizes. I tried the shoes on and walked around on the carpet. They felt a little large (long) with a little extra toe room but even this wide version was a bit narrow for me. No amount of tightening would stop the heel slip - a sign that the size is too large. If I went down a full size I know even the wide version would be too narrow. Maybe a half size smaller would fit, but it isn’t offered. I purchased a size 41W, my street shoe size is 7.5. I don’t feel that the Shimano size table is off, just too much of a compromise to offer only full sizes in cycling shoes that demand a precision fit. They do feel comfortable when cinched tight, a good sign of a well made shoe. I can’t comment on ride feel since I’m sending these back and not taking a chance on the full size smaller. Going back to a more familiar brand. My experience - cycling for 34 years. I’ve gone through quite a few high end shoes but these were my first try for Shimano.

powhoundus285974 p