Sidi Genius 5 Mega Fit Men's Road Cycling Shoe - Black Bike Accessories Brand_Retrospec which allows you to shift

which allows you to shift multiple cogs (you choose the number) by holding the shift button in place

The Sonic/Ergo is designed to present minimal frontal area to create as little aerodynamic drag as possible

this is an integrated shifting system for the modern triathlon/TT bike

11-speed: compatible with many modern road bikes

Sidi Genius 5 Mega Fit Men's Road Cycling Shoe - Black Bike Accessories Brand_Retrospec which allows you to shiftSidi Genius 5 Fit Mega Shoes The Millennium 4 Carbon Composite Sole features injected carbon fiber in a matrix of Nylon, providing more rigidity than a standard nylon sole. The carbon sole is also more durable, completely water resistant and mechanically stable. Meaning, it's less susceptible to changes in stiffness resulting from aging, prolonged usage, and changes in temperature or humidity. Features Soft instep for amazing comfort Micro caliper