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Shimano S-Phyre RC902 road shoes get new mixed stiffness, wrap-around design

shiny red shimano s-phyre rc902 road racing bike shoes
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Among high-end road cycling shoes, the new Shimano S-Phyre RC902 shoes check the boxes for light weight and stiffness. It’s the unique new 360º wrap-around upper, optimized heel cup stability, and segmented stiffness that set it apart. Those, and the shiny new red option that’s…(wait for it)…on Phyre!

2021 Shimano S-Phyre road shoe specs

shiny black shimano s-phyre rc902 road racing bike shoes

Designed for top level road racing, the new S-Phyre RC902 uses the latest BOA Li2 closures with a snaking wire path. This, along with the Li2’s micro adjustments and a new toe-box shape new Dynalast shape, helps the shoes fit a wider range of foot shapes.

Out back, their Bikefitting.com pedal analysis led them to rework the heel cup to better stabilize the foot. It’s “anti-twist stabilizer heel cup technology”, and it’s designed to resist the intense twisting forces created during all-out sprint efforts.

But it’s not just a massively stiff heel cup. It’s a mix of rigid and flexible sections that better stabilizes the top of the heel cup to reduce overall foot movement, but other parts of the shoe earn a bit more give.

shiny blue shimano s-phyre rc902 road racing bike shoes

The upper uses different layers of material to add flex and ventilation where it can, but prevent stretch where needed. And it wraps all the way around the bottom, which they say gives it a slipper-like comfort. But also a very secure fit.

Hidden underneath, it carries over the level-12 stiffness sole to maximize power transfer.

2021 Shimano S-Phyre road shoe sizes & pricing

shiny white shimano s-phyre rc902 road racing bike shoes

The S-Phyre RC902 bike shoes will retail for $425 USD and have a claimed weight of 235g (likely for a 42 men’s size), available October 2020. They come in red, white, blue and black for men’s sizing 36-48 (half sizes 37-47), and in white in women’s sizing 36-44 (full sizes only).

Bike.Shimano.com

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Onrhodes
2 years ago

Dang it! I just bought some S-works last month after 7 years on my old shoes. I really dig those red shoes though. “There’s no place like home”.

Tom
Tom
2 years ago

Looks like pretty minor detail changes compared to last year. I have a pair, and the problem is the insole – it’s just not up to the standard of the R321 insole. Maybe that one is too heavy or something, but I really wish the stock RC901 insole had more contour/arch support.

Joenomad
Joenomad
2 years ago
Reply to  Tom

If you are able to invest in $425 shoes, I am sure you can spare some cash for custom insoles. Just saying. PS, I would love to have these in 46 wide if anyone is feeling generous.

Tom
Tom
2 years ago
Reply to  Joenomad

fortunately for me, I got them for quite a bit less. But my point about inferiority compared to the 321 insole stands, especially at $425. On the other hand, Spec still makes you buy new insoles if you have anything other than flat feet.

Hexsense
Hexsense
2 years ago
Reply to  Tom

Not sure about insole of RC901 as I only have RC900. But insole of 900 is pretty good. it has adjustable arch support. I tried 4 pair insoles so far and I just stick with Shimano one (with high arch setting on one foot, medium arch for the another) for the balance combination of comfort, weight and thin stack height.

Tom
Tom
2 years ago
Reply to  Hexsense

I’m sure its the same insole. Tried a pair for another pair of shoes, and again, found them lacking. Now running old R321 insoles in the other shoes. The stock RC901 insoles are def thinning than the 321s, which might be part of my problem. I know the Spec Blues won’t work in the RC901s, too thick.

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