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Replacing axle-mounted front wheels on electric box bike (aggregatet.org)

submitted 4 months ago by amanda@aggregatet.org to c/diy@slrpnk.net

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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?

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[–] amanda@aggregatet.org 1 points 4 months ago

Not a dumb question at all! Drum brakes on bikes seem to be almost universally single use, and I assume getting the spare parts for these would be even more difficult than getting new hubs if they existed.