Shimano says its new RX910 S-Phyre gravel shoes resolve the contradictory demands gravel racing puts on your footwear.
Gravel racing requires the power transfer you get from road shoes and cleats, and off-road traction for technical terrain.
But Shimano says its latest gravel shoes resolve this by “offering unmatched power transfer, walking stability, and all-day pedalling comfort in one streamlined package”. And a big part of how the RX910 S-Phyres do this is Shimano's new and “revolutionary” Pontoon cleat system.
The Pontoon cleat system
The Pontoon cleat system has a pair of modular, replaceable TPU contact blocks, which complement the lugged outsole. Shimano says these blocks “dramatically improve the shoe-to-pedal contact point” to optimise power transfer.
“The system enables a road-shoe-like pedalling interface while maintaining SPD compatibility and off-road functionality,” Shimano says.
While conventional gravel shoes have blocks mounted on their outsoles, Shimano says the RX910’s ‘pontoons’ are part of the cleat interface. This means they move with your cleat position to provide "consistent support and efficiency”.
Shimano says it developed its latest shoes with the professional gravel racer, Pete Stetina. “For me [the Pontoon cleat system] is the most exciting point of this shoe,” says Stetina. “You now have road stability and power transfer while still having the offroad benefits of mud shedding and quick engagement of SPD.”
Shimano’s stiffest sole and other features
The RX910 S-Phyre’s power transfer is also aided by its carbon sole, which scores 12/12 on Shimano’s own stiffness scale.
This is two points stiffer than the previous RX801 gravel shoes and the same stiffness level as the Shimano S-Phyre RC902 road shoes.
Elsewhere, Shimano says the RX910s have a seamless midsole construction to reduce stack height and improve pedalling efficiency.
Drainage holes will let water escape from crossing rivers and on rainy days, and provide ventilation in hot weather.
When it comes to fit, Shimano has equipped the RX910s with Boa dials for micro-adjustments. An anti-twist heel cup and surround wrapping upper should help hold your foot comfortably.
The shoes weigh a claimed 304g (size 43) and come in a range of standard, half and wide sizes.
They will cost you £369.99 / $480 / €419.95.
