As I posted earlier, I had to mount the battery on the rear rack because if I mounted it on the down tube I would have to give up both water bottle cages on my frame. Since I couldn’t find an e-bike specific battery rack that would fit my battery, I need to fabricate my own. The battery is the most expensive component of my conversion kit. So, I wanted it to be super securely mounted on my rear rack.
Initially, I bought the Wolf Tooth B-RAD 4 Mounting Base for this purpose. The B-RAD 4 is Wolf Tooth’s longest base with 9 threaded holes for ultimate flexibility. While my original idea of using the B-RAD 4 on the rear rack worked well, I realized that the B-RAD Base would also give me the ability to precisely position the battery on the downtube.
Now, with the B-RAD 4 I’m able to move the battery to the downtube and still save the seat tube bottle cage. In addition, my rather large 840WH battery is safely tucked inside the bicycle frame and approximately 9 lbs. of weigh was moved lower and more centered on the bike for improved handling.
Ken Whittaker