Let's talk about a unique shoe design that's causing quite a stir in the cycling world! The Shimano RX 910 S-Phyre Gravel Shoes are a game-changer, but are they truly revolutionary, or just a clever marketing ploy?
Gravel shoes, an intriguing concept, aim to bridge the gap between XC and road shoes. While XC shoes offer protection, they can be overkill for gravel riding. Road shoes, on the other hand, are lightweight but lack the practicality for walking or hiking. So, the question arises: why not just stick with XC shoes?
Enter Shimano with their innovative Pontoon Cleat System, a feature that promises to revolutionize the connection between your shoe and the pedal.
The Pontoon Cleat System is the star of the RX 910 S-Phyre. Unlike traditional two-bolt cleat systems, Shimano has integrated the cleat with the surrounding lugs, creating a solid and stable connection. This design ensures maximum contact between the pedal and the shoe, providing an exceptional level of stability.
But here's where it gets controversial: is this Pontoon Cleat just a clever gimmick, or does it genuinely enhance the riding experience? Let's explore further.
The RX 910 S-Phyre gravel shoes, at first glance, resemble their XC counterparts, the XC 903 S-Phyre. However, they offer less protection on the toe, mid-foot, and sole, and feature TPU lugs instead of rubber. This design choice prioritizes durability and grip over outright protection.
Interestingly, despite the reduced tread and armor, these shoes weigh slightly more than their XC counterparts. A size 45 pair of S-Phyre gravel shoes tips the scales at 335g per shoe, compared to the XC 903's 322g.
The uppers, crafted from a supple microfiber synthetic leather, offer a comfortable and customizable fit thanks to the dual Li2 Boa dials. Unlike some race-focused shoes, these require no break-in period and are largely hotspot-free.
Shimano has also considered the shoe's livability, offering insoles with adjustable arch support and good-sized drain holes in the sole. This feature is particularly handy for riders who encounter river crossings or flooded paths.
Additionally, Shimano deserves praise for providing these shoes in both standard and wide lasts, accommodating a full range of sizes, including half sizes.
However, one minor gripe is the use of white on the sole and toe bumpers. While the shoes clean up nicely, a darker color option would be appreciated for areas prone to mud and dirt.
The plastic anti-twist heel cup, according to Shimano, provides stabilization and optimal foot positioning. It effectively enhances the support offered by the sole, keeping your foot securely in place during intense pedaling.
The carbon plate sole is rated 12/12 on Shimano's stiffness scale, compared to the XC shoes' 11/12. While the difference in power transfer may not be noticeable to all riders, these shoes excel in efficiency without transmitting excessive high-frequency vibrations.
While these shoes excel in pedaling efficiency, they fall short in walkability. The TPU lugs and stiff sole lack the flexibility and grip needed for hiking or scrambling.
In summary, the RX 910 S-Phyre offers unmatched power transfer and stability when clipped in. They are incredibly comfortable and breathable, with well-designed drain holes. However, they come with some trade-offs: they are compatible only with Shimano cleats and pedals, and they're not ideal for hike-a-bike situations.
So, why not just wear XC shoes? If your gravel rides are more akin to mountain biking, with lots of pushing, walking, and scrambling, the XC version of this shoe might be a better fit. On the other hand, if your trails are rock-free and you rarely need to dismount, these shoes could be an ultra-efficient XC option.
And this is the part most people miss: the choice between gravel and XC shoes depends on your riding style and terrain. So, what's your take? Are these shoes a game-changer, or just a clever marketing move? We'd love to hear your thoughts in the comments!
