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Shimano S-Phyre SH-RC903

The BOA® Fit System delivers micro-adjustable precision fit, engineered to perform in the toughest conditions on the Shimano S-Phyre SH-RC903 cycling shoe with Li2.

DIALED IN - Micro-adjustable, precision fit.
LOCKED IN - Connected fit locks in the heel for improved power transfer and efficiency.
CONFIDENT - Engineered and built to perform in the toughest conditions.

Dial And Lace Specs

CS1

Flexible strength for low-power configurations. CS1 lace uses 49 strands of stainless steel wrapped in nylon to withstand abrasion to shed dirt, debris, and water.

Li2

Lightweight and low-profile, Li2 enables multidirectional adjustments for tightening and loosening at every turn, climb, and sprint. Built to last, the dial platform is engineered with unprecedented durability against impact, abrasion, dirt, and debris.

  • Push in to engage
  • Turn to tighten
  • Turn to loosen
  • Pull up for fast release

How the Boa Fit System Works

Multidirectional Precision Fit + Fast Release

Explore Li2