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Shimano S-Phyre RC9 (RC902) SPD-SL Shoes



Comfy and stiff with great heel retention – what more could you ask of a flashy set of race shoes?
Heel retention is excellent
Revised shape might not suit fans of the old S-Phyre RC9s
497g Recommends

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At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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Shimano's S-Phyre RC902 shoes are stiff, comfortable and hold the foot securely during big power efforts. There are changes over the previous model, the RC9, but the basics stay the same. This is a comfortable, well-thought-out pair of race shoes.

Just like saddles, shoes are highly individual pieces of kit. What works for me might not work for you and when you find your Cinderella glass shoe, you're likely to stick with the design. That's why I was a little miffed when I read that Shimano was set to alter the fit on its flagship road race shoe. I'd become rather comfortable in the first generation of the S-Phyre RC9 shoe.

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I won't spend too much time on things like stiffness and the Boa dials. Both were good before and both are still exactly what you want from a race shoe. Shimano gives the S-Phyre RC902 sole a rating of 12 out of 12, suggesting that it's a fan of WeRateDogs, but the rating is well earned. These are very stiff soles that are easily a match for my biggest sprints.

It is also a very thin sole and that results in a low stack height for better connection to the pedal.

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - in step.jpg

On longer days, an overly rigid sole can cause foot pain from the constant vibrations being transferred to the foot. Thankfully, just as my original RC9s were comfortable all day, the new sole is still great at isolating the foot from that horrible road buzz and I had no issues with discomfort.

Boa's Li2 dials are new and they do what Boa dials have done for years now. The tension adjustment is great, and once set they hold that tension perfectly. The micro-adjustability goes both ways, allowing you to crank the dials down tight for town sign sprints and then release them a bit once you've beaten your mates.

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - BOA dials.jpg

The upper dial pulls on a wide strap which I found to spread pressure very well. While the lower dial relies on a criss-cross pattern to spread the retention pressure, I found it perfectly comfortable, even when over-tightened for those all-important sprints.

Okay, that's the basics, but what about the things that deviate from the old design? We've got a new heel cup that gives a tighter fit. There is a less-aggressive taper at the toe box, and the midfoot area feels a lot more snug. While the shoes might look similar to the old models, the fit has changed and it is really noticeable if you head out in one of the new shoes and one of the old...

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - heels.jpg

First up, the 'improved' heel cup. As a keen have-a-go bike racer, I think the move from a cat's tongue material to two rubberised pads sitting on either side of the Achilles tendon is a brilliant one. This system absolutely clamps the heel in place. I don't know if this actually improves power transfer, but psychologically, knowing that my foot isn't slipping one bit is great when riding hard or doing sprints. In fact, I like this heel cup design so much that I'm really hoping that Shimano transfers it over to the mountain bike version of this shoe.

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - sole heel.jpg

I'm also a fan of the new toe box design, and while I didn't have any toe discomfort when using the old shoes, there is a bit more wiggleability in the new toe box.

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - toe.jpg

It's when we get to the redesigned midfoot area that I think Shimano will either gain or lose your business. The fit is noticeably more snug on my foot, which did feel weird at first. I went out in one of my old shoes and one of the new shoes and the difference is definitely noticeable. After a few rides in the new model, the shoes feel perfectly comfortable, but if you loved the old ones for the fit around the midfoot then you might not like the new design so much.

2021 Shimano S-PHYRE RC9 (RC902) SPD-SL Shoes - side.jpg

Thankfully, those of you with wider feet still have Shimano's wide-fit shoes to turn to. The key takeaway from the changes will be that it's really important to try these shoes on before you commit to buying them – or check the returns policy if buying online.

In terms of price, this is a high-end race shoe and you are paying about the going rate for what you're getting. In fact, these aren't awfully expensive in comparison to the competition. The S-Works Ares shoes are £375, Sidi's Shot 2s are £375, and Lake's CX403 CFCs are £425, though the Lakes are custom mouldable at home.

> Buyer’s Guide: 24 of the best high performance road cycling shoes

So, there are changes to the Shimano S-Phyre RC902 that will mean they might not fit fans of the older S-Phyre RC9 shoes. But for a race shoe, they deliver on the stiffness front and the heel retention is brilliant. Comfort is good for long rides and I have to say that I'm still a big fan of the S-Phyres.


Comfy and stiff with great heel retention – what more could you ask of a flashy set of race shoes? test report

Make and model: Shimano S-Phyre RC9 (RC902) SPD-SL Shoes

Size tested: 42

Tell us what the product is for

Shimano says, 'Light, stiff, supportive and comfortable, the latest generation of S-Phyres, Shimano's flagship road cycling shoes, have been updated once again. The reinforced upper, constructed from microfibre leather and mesh with perforations for enhanced breathability, utilises a 360° surround wrapping that stabilises the foot and is secured using dual BOA® Li2 dials for micro-adjustment and quick release.

'The toe box has undergone refinement to comfortably accommodate more foot shapes and the anti-twist heel cup increases pedalling efficiency and reduces movement within the shoe. Application of a Silvadur treatment prevents the build-up of bacteria over time, keeping your shoes feeling and smelling fresh ride after ride.

'The Dynalast™ carbon outsole is Shimano's stiffest to date, so no watts are lost when you're putting down the power. It's compatible with three-bolt cleats, and the expanded range of adjustment makes it easier to dial in an optimised position. A replaceable heel pad means you'll be able to preserve your carbon sole and take advantage of the benefits of these shoes to your performance season after season.'

Tell us some more about the technical aspects of the product?

Shimano lists:


360° surround upper provides enhanced instep rigidity and achieves a true glove-like fit

Brand new dual BOA® Li2 dials featuring a lower profile and two way micro-adjustability for aerodynamic tuning

Refined Dynalast™ to expand fit and comfort

Toe box shape refinement to accommodate a wider range of foot shapes


Combination of non-stretch Kuraray Rovenica, Teijin Nanofront and PU laminated mesh ensures optimal foot stabilisation to minimise energy loss


Anti-twist heel cup construction optimises efficiency by enhancing heel torsional rigidity, coupled with glass-fibre reinforced heel stabiliser designed to handle high intensity riding

Deeper cup-shaped carbon mid-sole provides closer pedal feel and riding efficiency

Weight: 235g (size 42)

Stiffness rating: 12

Rate the product for quality of construction:
Rate the product for performance:
Rate the product for durability:
Rate the product for fit:

The volume has been reduced around the midfoot, but then it feels like there is more space in the toe box.

Rate the product for sizing:

Come up a little smaller than in the past.

Rate the product for weight:
Rate the product for comfort:
Rate the product for value:

How easy is the product to care for? How did it respond to being washed?

They're white, so get the wet wipes ready, but with fewer mesh sections, they're easy to keep looking fresh.

Tell us how the product performed overall when used for its designed purpose

Perfectly. These are stiff for those big efforts, but they're also comfortable for training and general riding.

Tell us what you particularly liked about the product

The heel retention is a tangible improvement over the old design. It really locks you into the shoe.

Tell us what you particularly disliked about the product

I'm yet to find something.

How does the price compare to that of similar products in the market, including ones recently tested on

High, yes, but decent compared to the competition.

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Yes

Use this box to explain your overall score

These are excellent road race shoes – as stiff and comfortable as the previous model, but with better heel retention. They're even relatively well priced compared with the competition.

Overall rating: 9/10

About the tester

Age: 24  Height: 177cm  Weight: 62kg

I usually ride: Cannondale Supersix Di2  My best bike is:

I've been riding for: 5-10 years  I ride: Most days  I would class myself as: Expert

I regularly do the following types of riding: road racing, time trialling, cyclo cross, commuting, club rides, general fitness riding, I specialise in the Cafe Ride!

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