We have an electric cargo bike that’s served us really well. We bought it second hand at a pretty affordable price because the battery was shot. Fortunately we found a great local repair shop that could replace it, and we now have a pretty great bike.

Unfortunately the drum breaks on the front wheels are getting really bad after about 12 years or so, and our local bike repair shop is at a loss for finding new parts. The front wheels are mounted on an axle that’s controlled by hyudralics (which gives the bike a great turning radius), so they’re a bit special. The original hubs are Sturmey Archer XL-SD’s, but they don’t seem to be available anywhere.

Does anyone have suggestions for what I can use instead? Has anyone hacked their way to one-side-mounted front wheels for a three-wheeled bike, eg by using a through axle?