I'm building up a 36-spoke dynamo front wheel for a Mongoose Envoy cargo bike. It will be used casually for short trips, but I weigh 230 lbs and I may have a child or a load of groceries on. The stock tires are 60mm wide.
I have a 25mm wide, aluminum rim from an old Mongoose mountain bike, however it is a single-wall rim. I have never ridden or even seen an aluminum single wall rim and I want to know if it will be strong enough or if I should buy a more modern rim such as a Sun Rhyno Lite. As far as I know, disk brakes put more load on wheels than rim brakes and, since disc brakes didn't exist when this single wall rim was made, will there be a problem using it on a disc brake wheel?