Lupulin, thanks for asking; the controller is YES' 30 amp that comes stock with the rim brake kit. Battery mated beautifully and acceleration was more than acceptable, but haven't hooked up speedometer yet. Fun running with traffic while doing my errands. A friend, who owns a local bike shop (about 140 pounds compared to my 175) was almost able to wheelie the bike. Can't say enough about the battery since it's perfect for BBS02 and 750w, 48V hub system. Problem with speed is you (I) always want more.