Shimano announces fourth generation S-Phyre shoes

Shimano tells us that if we keep our eyes on the field at the UCI Road World Championships this week, we’ll see some new kicks at the feet of Mathieu van der Poel, Lorena Wiebes and Romain Bardet (to name a few). some ). The RC903 is the latest iteration of the high-end S-Phyre line of shoes, and it offers a relatively modest fit over the not-so-old RC902.

The stiff carbon sole – with its adjustable fore-aft cleat position and replaceable heel clip – continues unchanged. Likewise, the last (shape of the stem) is said to remain the same. However, switching to a premium microfiber perforated synthetic leather would be more flexible and elastic than the laminated mesh of the previous model. Meanwhile, a revised layout of the material pieces (pattern) is said to provide a more rounded and curved toe box as well.

Shimano replaced the previous “Power Zone” cable guides with a simpler cross-lacing pattern for the Boa Li2 wires. It’s a change that was made due to reports of small, stiff pieces of plastic causing pressure points in some riders. Meanwhile, the heel cup is all new and offers a more integrated look with what’s supposed to be an even more stable fit.

Boa cable guides have been completely revised for a simpler design.
The heel cup now offers a more integrated look and boasts better support.

Shimano quotes a size EU42 pair as weighing 450 grams, a saving of 20g over the RC902. Availability of specific sizes varies by region. Those in the US will have access to a range of sizes from EU40 to EU48, with half sizes available from EU40.5 to 46.5.

Shimano also delivers all of these updates in the RC903W, a women’s specific version of the shoe that’s built around a lower volume and tighter fit. And while the men’s version comes in white, black, blue, or red options, the women’s shoe is only available in pearl white. This women’s version is available in all sizes from EU36 to EU44.

The modest changes are apparently pretty much all done in the name of comfort and perhaps to be a little less polarizing in fit as James Huang noted in his review of the RC902. We haven’t tried this new shoe yet, but given that the older S-Phyres (RC9 and RC901) were favorites of some staff – myself included – there’s a desire to find out how the fourth gen performs. feels.

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