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Congrats on the weight loss! If you keep having spoke issues, you might want to build a more badass rear wheel for your ride. My other bike is a Yuba Mundo, which has a stated 440lb limit, which I've surpassed several times with no issues. I run Schwalbe Big Apples, which have a 500lb each limit on a rear wheel with 48 spokes built around a 14 mm bmx hub. Absolutely big boy bomb proof. You wouldn't necessarily need something that extreme—they sell a standard 10 mm wheel for about $70—but I like the safety margin.
Thanks for the good word, much appreciated. I believe you are right about building a more badass rear wheel. I've been pondering that and might take a stab at it this weekend. I have some used downhill rims that are simply way better than the stock rim I keep nursing.
SO...you have a Yuba Mundo! IMHO, the Cadillac of cargo bikes! A local REI had one of those that had been returned, took all my willpower to leave without buying it (I have 4 bikes already, so I gotta use what I have...no impulse buying for me...)
I run Schwalbe Marathons on my ebike and they "changed my life". Schwalbe makes amazing tires - worth every penny if you are riding hard, long distance, or every day.
How do you like the ebike?
The ebike has been KILLER! I have a fairly long commute - 32 miles each way. I'm aware of how bad that is from what I've learned about mustachianism, and I agree car commutes are crazy. Building and using the ebike changed all that, however. I'm very nearly being able to commute the distance using the ebike in the SAME TIME it takes to do it in the car, because traffic moves slow and I can pass everyone on the ebike. Ebikes and ebike components aren't "cheap", but if you ride every day, you make that money back pretty quick.
Now, one important thing: I didn't build an ebike to get an electric scooter. Pedaling is important to me and if I didn't want to pedal, I'd just have converted a motorcycle. So I'm not telling you this because I've turned my back on bicycling - the battery and motor are only a range extender for what I already do with my other non-electric bikes.
Just to ruin your life, :-) here's the link to my "build thread":
http://endless-sphere.com/forums/viewtopic.php?f=6&t=45993