Shimano SH-RC903 S-Phyre Shoe

The Shimano Men's SH-RC903 S-Phyre Road Shoe is the next generation in ultimate performance. For the new 903s Shimano took the best and made it better, adding more ventilation, a more comfortable fit, and reducing weight.

From the ground up, the 903 starts with the same Shimano ultra stiff carbon sole (12 on their stiffness index) for unrivaled power transfer. For this iteration it's now ventilated at the heel and toe to keep your feet from overheating during your hardest efforts.

The fit is improved with a new 2-way BOA Li2 system to get your precise fit dialed in every time. The lacing has been updated to get you a more secure fit without hot spots, especially on the toe box. Combined with the supportive but flexible microfiber leather upper and redesigned anti-twist heel cup, this shoe is made to keep your feet locked in so you can stay focused on any sprint, climb, or descent you're pushing to the limit.

And with a claimed weight of just 225 grams in a size 42, the 903 comes in at least 10 grams lighter than the 902.