First timer and asking some honest questions about E-bikes

Hydraulic brake manufacturers usually specify their proprietary brand of brake fluid. No condensing on DOT3 the way the car market has gone. Buy the brand fluid your hydraulic brakes are.
When the brake handle gets near the handlebar, it is time to adjust the brake pads (cable pull) or replace them. Hydraulic brakes are supposed to be self adjusting.
If you are downhill mountain bike racing then the highest price finned metallic pads are required. If you are puttering around at 8 mph like me, the other kind are quieter. Can't remember the word right now; it begins with an e. Looks like asbestos but it's not.
Brake pads come in different shapes for different brands. No aftermarket vendor (modernbike.com thebikeshopstore.com competitivecyclist.com) sold brake pads for my tektro brakes , so I went by the picture and bought cheap pads off ebay for a shimano. They fit. That meant I had to take the brake caliper off & look at the pad, though, to match it up and guess. Nobody will show a dimension for a pad, or anything else on the bike except frame, wheels, & tires. Sun, Shimano, Sram, all part pdf files are dimensionless.
About wrapping the battery, I wrapped mine in the plastic foam sheet the battery came from luna in. Similar 1/8" thick foam sheet is used to pack other products. Taped it up with 3m package tape. I use the same foam to pad my seat, since the yuba OEM seat and the selle royale respiro were such bricks. **** cloud 9 won't fit my bike. Riding a mesinger leather seat I salvaged off a $15 bike from Salvation Army. At least it has 2 springs in the back to rock right & left.

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Crystal clear the motor is happier with a 20" wheel. But the whole package of rider comfort and motor needs to be considered.

For the longest rides, rider comfort may trump all. My long distance touring/ cargo bike was built with the focus 90% rider comfort, then I just upsized the motor enough to have one capable of hauling me, and all that heavy bike plus cargo. This bike is full suspension, extra long, very plush to ride, and 130 pounds without the battery. It's suspension makes it actually comfortable to ride on washboard dirt roads, at full gallop. Hopefully it will also have less problems with spokes and rims on a long ride. So far it has.

My next project will also be a cargo bike, but intended for shorter runs to the store. It's going to be less long, no suspension, and the motor will be in a 20" rear wheel.

More or less imitating the edgerunner but about a foot shorter. And on the cheap. http://www.ebikes.ca/shop/edgerunner.html

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