I wrecked my R30 today and had to go to the hospital. It was a chain of unlucky events, but one link in the chain was a quality problem with the R30.
I had to mail a small package today, so I took it to the post office on my R30. My brakes were being kinda sticky and making scraping noises on the discs. I squeezed them both down hard to realign them, something I had done before many times. This time, the front brake cable burst and leaked fluid. It was useless.
The cause? The front brake cable routinely would scrape against the inside of the front wheel cover. It made an annoying sound when this happened, so I would routinely adjust it. The braking pressure would always move it back to the position in which it rubbed, so I would always have to move it back. I have heard of other people having a similar problem. This seems like a design flaw.
Well I guess over time the rubbing created a weak point in the cable. The last squeeze was the straw that broke the camel's back.
"Oh s***," I thought, "I'll have to get this fixed. OK, ASAP, but first I'll just go home because the shop is closed already anyway. The back break is pretty strong and reliable."
When I was almost home, something bad happened. A car wasn't looking and pulled out of a driveway right in front of me. I screamed with all my might and got her attention and she slammed on the brake. But it was too late. I crashed into the front of her car at about 25mph and flipped over the bike. Thank God I was wearing a DOT helmet because my head did hit the ground on the second bounce. I got scrapped up here and there, but my right foot was the big victim. It has swollen up and got a deep cut and a lot of bruises. I think I sprained it or something. Fortunately no bones broke, but damn it hurts. I'll be on crutches for at least a week. And the bike is totaled.
I don't know if having both brakes could have stopped the collision. But it might have, or least have reduced the impact speed.
So in summary, you can have a very nice motor and Kelly controller and battery equalizer and automatic charger, but if you don't have a quality build of the things that aren't specific to electric bikes, it can cause serious problems. The bike has some nice components but overall the build is cheap Chinese junk. They pass the savings on to you. Great deal until you have an accident.