Nite Ize Seeem violet

When the light is poor, Nite Ize Seem™ bike wheels transform from "hard to see" to "impossible to overlook." They are easy to attach and reposition, made from durable, long-lasting plastic, and feature stainless steel-backed clips specifically designed to securely snap onto oval, round, and flat bike spokes. A bright, long-lasting LED (powered by a replaceable lithium battery) is activated with a simple twist and is visible even in the darkest night, ensuring you are seen and safe while cycling. Not only that: as the wheels spin, Seem creates the highly attention-grabbing effect of a moving light circle. Use one or more on each wheel to create your own signature color bands.