All of the rear motorcycle fenders we sell are heavy-duty and great for carrying a passenger on a two-up seat. However, how the fender is mounted is very important. If it is a stock-fitment Harley-style fender that is supported by stock fender struts /frame rails on each side it is built for two riders. When mounting a custom chopper-style fender for use with a passenger, it must be mounted securely to ensure safety. Check out our array of fender mounting fabrication parts and sissy bars for some great options. When in doubt, hire a professional fabricator and welder to do the work!