Giro Chrono Short Sleeve Base Layer Size:MEDIUM/LARGE The PD-M540 features a sealed

The PD-M540 features a sealed cartridge bearing spindle to help keep dirt and water out increasing efficiency and life

check motor assist level and view the remaining battery charge

Lasered black ano 6061 T6 aluminum clamps

moisture transfer

integrated and sleek

Giro Chrono Short Sleeve Base Layer Size:MEDIUM/LARGE The PD-M540 features a sealedAbout Giro Chrono Short Sleeve Base Layer The layer closest to your skin should get the most consideration. Temperature regulation and moisture management are critical to your performance and comfort during a ride, which is why base layers can be an amazing upgrade to any cycling kit. But high performance means nothing without exceptional fit and comfort. That's why no other base layer beats the Chrono SS Base Layer, built from their proprietary