Livall EVO21 Smart Bike Helmet Size:Large Maximum tire width: 5”

Maximum tire width: 5”

Weight: 280 g

up to 50 miles distance range before needing a charge

Its innovative formula is designed to encapsulate any surface dirt to prevent scratching

Shifter: SRAM NX E-click shift levers

Livall EVO21 Smart Bike Helmet Size:Large Maximum tire width: 5”It's time to take your helmet further with the EVO21 smart helmet. Brighter: EVO21 offers true 360' coverage, with brake light warning light and turn signals for visibility from all directions. Lighter: With 30% more ventilation and 350g lightweight design, youll stay ahead of the pack while cutting down on sweat. Safer: Features patented fall detection and SOS technology. So in the event of a fall, it sends a text message alert to your emergency