electricridefl
1 kW
- Joined
- Jan 5, 2008
- Messages
- 374
I buy this used bike for almost $800. The frame looked like ready to fit battery.View attachment 1
rear 409 brushless hubmotor, 7sp freewheel, , put on merida seat, merida basket, pieced together some fenders, replace front sprocket from 44t to 48t, shwalbe rear tire, maxxis front, 72v controller, twist throttle, filed the shifter lever some to clear the throttle, sla batteries, b&b hr9ah=12v x 4 and hr9=6v x 4, making the battery space the same as 4=12ah 12v batteries. 36lbs of battery 2 groups of 36v each, with 3pdt for series/parallel connection, charge with 36v charger. Batteries fit into frame tight with some filing. Bent a flat piece of aluminum to make bottom box 2 screws into water bottle holes. And then completed with white duct tape for rigidity and aesthetics. Anyhow, commute only 5 miles. So its probably got a years worth of commuting on it, over a two year period. I really don't enjoy the flat tires, and have to call the wife, and try to stuff this 100lb thing into the back of the minivan, and get grease on things, etc. The rear shwalbe has not left me stranded like the maxxis. I have ridden in rain sometimes. All of my rear wheel spokes have broken on the freewheel side, but then I turned all the elbows out, and that is not a problem any more. This bike is just amazing to ride. No first gear, chain too short . Goes through dirt and grass fine, 30mph speed, can easily stand rear wheel in air, and will do really nice long smooth wheelies when battery is good. The problem was I put identical 12v and 6v batteries in series. So the cells of the batteries were not anything close to being equal, so had to replace a couple 12v batteries. When new, the batteries used about half their capacity for 5 mile trip. Now they are all getting weak (fully drained) after 5 miles. Hopefully my wait to get a good battery is over, with the availabilty of lifepo4. View attachment 1
rear 409 brushless hubmotor, 7sp freewheel, , put on merida seat, merida basket, pieced together some fenders, replace front sprocket from 44t to 48t, shwalbe rear tire, maxxis front, 72v controller, twist throttle, filed the shifter lever some to clear the throttle, sla batteries, b&b hr9ah=12v x 4 and hr9=6v x 4, making the battery space the same as 4=12ah 12v batteries. 36lbs of battery 2 groups of 36v each, with 3pdt for series/parallel connection, charge with 36v charger. Batteries fit into frame tight with some filing. Bent a flat piece of aluminum to make bottom box 2 screws into water bottle holes. And then completed with white duct tape for rigidity and aesthetics. Anyhow, commute only 5 miles. So its probably got a years worth of commuting on it, over a two year period. I really don't enjoy the flat tires, and have to call the wife, and try to stuff this 100lb thing into the back of the minivan, and get grease on things, etc. The rear shwalbe has not left me stranded like the maxxis. I have ridden in rain sometimes. All of my rear wheel spokes have broken on the freewheel side, but then I turned all the elbows out, and that is not a problem any more. This bike is just amazing to ride. No first gear, chain too short . Goes through dirt and grass fine, 30mph speed, can easily stand rear wheel in air, and will do really nice long smooth wheelies when battery is good. The problem was I put identical 12v and 6v batteries in series. So the cells of the batteries were not anything close to being equal, so had to replace a couple 12v batteries. When new, the batteries used about half their capacity for 5 mile trip. Now they are all getting weak (fully drained) after 5 miles. Hopefully my wait to get a good battery is over, with the availabilty of lifepo4. View attachment 1
