These all new spoke lights from cateye fit neatly to the wheel and unlike reflectors dont require the reflection of vehicle lights to be seen once illuminated the powerful leds light up the wheel making you side on visible when stationary or moving the spokes create a powerful ring of light when in motion giving you and the bike an extra layer of safety on the roads replaceable 2032 batteries included tool free installation constant and flashing modes to mount on 3236 spoke wheels a