When the light is poor, Nite Ize See 'Ems turn bicycle wheels from "hard to spot" to "impossible to miss.
" Easy to attach and reposition and molded of tough, durable plastic, they're backed with stainless steel clips specially designed to snap securely onto oval, round and bladed (flat) bicycle spokes. A bright, long-lasting LED (powered by a replaceable lithium battery) is activated by a simple twist and can be seen in even the darkest night to keep you seen and safe while riding your bike. Not only that-when the wheels are spinning, See'Ems create the ultra-attention-getting effect of a moving circle of light. Use one or several on each wheel to create your own signature bands of color.