Hello AugustMainer,
Assembling the bike was pretty straightforward if you watch the YouTube assembly videos. My brakes seemed very tight so I did have to adjust the calipers wider a bit. Easy to do with the front wheel, not so easy with the rear due to the motor being in the way. I ended up removing the caliper from the bike to make the adjustment, then reinstalled it. My fix for that issue is to saw off about 3/8" of the Allen wrench from the long end and epoxy it to a paint stir stick to create a narrow, long-handled tool specific to adjusting the rear caliper without having to remove the wheel. I also needed to adjust the derailleur a bit to get it to shift into all gears successfully.
RangerDave
RangerDave reports that the brakes were very tight. That was my experience also. I was nervous initially about adjusting disc brakes because I had never dealt with them before but they are pretty simple beasts. It seems to me that Rad is shipping bikes now with the brake adjusted almost closed. You can tell because there is no movement in the brake lever.
Adjust the front brake first. There is a quarter-sized silver pad that you will use to change the pad distance using a supplied allen wrench. You can see it from the side of the wheel that is opposite to the brake.
The back brake is trickier. You can't get to it from the other side of the wheel because the motor blocks access. You may need to remove the brake. There are only two bolts to unscrew but they are screwed in tight. Unscrew the bolts and remove the brake. This will give you access to the pad-adjustment. The next step is to figure how much change in the distance between pads. Here is what I did. I made adjustments in the between pad distance and then remounted the brake. I only tightened enough such that the brake was not wobbling about. Then I checked the squeeze distance on the brake handle. I aimed for about a 1/3 squeeze distance to produce complete close. If too much or too little then I took off the brake and readjusted pad distance.
After getting a good distance setting, then I used the insight of another poster. I had the setting of the mounting screws slightly tight. The I pulled the brake lever very hard to rotate the brake slightly to produce full contact with the rotor. Then I screwed the bolts very tight.
(Luckily, I had a torque wrench but it would only reach the lower bolt. I will be watching the bolts for the next few rides.)
(Another poster has a solution which looks like a paint stirrer with a nub of a Allen wrench embedded. Once you adjusted the front brake, you will see the idea. I have no experience with the tool.)
Ken