Our unique and Patented design racks carry mountain bikes hung vertically with their front wheels and handlebars turned, allowing the closest possible contact-free spacing of bikes. We have two basic designs. Our hugely popular Classic 4-bike rack (no longer in production) and our NSR series (2, 4 and 6 bike models). The NSR series is so efficient we are able to offer it in a 6-bike version. No other bike racks are easier or faster to use, or pack as many bikes into such a close space without the bikes rubbing against each other. Take a closer look and we think you'll agree. Note: not compatible with fork crown mounted fenders; not intended for road bikes.