Bionx rim failures
I've now encountered two Bionx rim failures. The rim came apart at the sidewall wear indicator, peeling like a banana. The first I put down to extreme usage, on a recumbent tandem with two larger riders, but the second was the rear wheel on a tadpole trike, hardly an extreme use. In both instances the tire pressure was 100 psi. Both were 350W units with less than 6 months usage on them. The tandem was equipped with a disc brake, and the trike was not equipped with a rear brake (front discs), so the sidewalls had no brake wear on them. I dropped the tandem rim off at a Bionx dealer so he could send it to Bionx for analysis. Haven't heard anything. I would hope they would be concerned as their website has advertised Bionx units as suitable for tandems.
I rebuilt the unit from the tandem onto a Sun Rhyno Lite rim and there have been no problems, and I'm doing the same with the trike.