jebike
100 mW
I posted about a week ago to get some info on some ebike kits. I've been reading a lot since then and I keep finding more and more options. I've narrowed my choices down to the following and was hoping I could get some advice on the benefits and weaknesses of each (what would you choose)? Also, if I'm missing a kit in the $300-$400 range (shipped) that would be better, please let me know.
The battery I've purchased is a V power 36v 20ah lifepo4, dimensions 290mm x 210mm x 100mm, Max discharge 40A, rated charge current 6 amps, rated discharge <12amps.
My goals are as follows: create a bike that can go 20-30mph and has a minimum range of 20miles with no pedal assistance. I live in the greater Seattle area and there are hills. I would also like to build something that looks as much like a normal bike as possible and is as quiet as possible. Safety is pretty high too, which is why I'm ruling out the front hub kits.
All the kits I'm considering are rear drive and I'm currently leaning towards the 8fun motor. It's the second cheapest and I like the size and stealthiness of it. From what I've been reading it appears to be pretty quick too and will also allow me to thrown on a disc brake in the future. I know with the em3ev kit that I will get a better wheel, but I'm not sure if there are any other benefits of that kit and the wheel motor is also much more visible? The yescomusa kit has the obvious benefit of being super cheap! It has a higher wattage also, I'm not sure if that necessarily equals a faster motor.
I still need to figure out if I should use a rear torque arm with these kits and if so, is one sufficient, or do i need one for each side? Where is the cheapest place to get one? I'm also wondering if the e bike brakes are really necessary for a kit with this type of power. I would much rather just have some sort of a kill switch and use the brake levers i already have. I'm also wondering about the best way to hide the controller. I'm going to have a rear rack frame bag for my battery, but I've read the controllers get to hot to be put in a bag. Anyone have any creative solutions?
So far my bike build specs are as follows.
Nashbar 26mtb frame
Xt v-brakes w avid levers
Fork: still deciding between a rockshox tk 28, surly 1x1, or on one chromo fork.
X4 rear derailluer and shifter / 8 speed.
110mm stem
Vans ODI grips
Wellgo pedals
Fsa headset
Scott 700mm mtb bar
Raceface evolve dh Ss crank w external BB
1.75 mtb tires, will upgrade to a larger volume street tire as money allows.
Kits I'm considering:
1) GBK - 8fun BPM motor kit 36V500W for electric bicycle
Motor code
10
RPM
216
Throttle with LED or not
Twist throttle without LED display
Wheel size
26"
2) em3ev DD
500W Direct Drive Kit
- Motor Speed Rear 275rpm (220rpm loaded, 36V)
- Controller Type 9 fet 30A (36-75V, IRFB4110)
- Wheel Type 20" Alex DM18 CNC
- Spoke Type Sapim Upgrade (Silver)
- Throttle Type Half Twist
- Ebrakes Yes
3) Yescomusa 36v 800w kit
Approx. 30 KPH top speed
Provides you with a whole wheel with tire, not just the tire frame Takes less than an hour to install
The kit includes motorized wheel, motor controller, battery charger, thumb throttle, power break lever, wire harness
Quiet and reliable brushless gearless hub motor
Motor specifications: 36V / 800W / 350RPM
High motor efficiency: 75%
Motor diameter: 245mm
Drive system has no moving chains or gears, no friction, more efficient, less chance to break!
Brake shuts off motor automatically, saves energy, improves safety!
Thumb throttle with 3 LEDs indicator lights
Battery charger for charging lead-acid battery
Durable 600D Oxford cloth carrying bag along with a zippered main compartment for battery
It's for bicycle only.
The battery I've purchased is a V power 36v 20ah lifepo4, dimensions 290mm x 210mm x 100mm, Max discharge 40A, rated charge current 6 amps, rated discharge <12amps.
My goals are as follows: create a bike that can go 20-30mph and has a minimum range of 20miles with no pedal assistance. I live in the greater Seattle area and there are hills. I would also like to build something that looks as much like a normal bike as possible and is as quiet as possible. Safety is pretty high too, which is why I'm ruling out the front hub kits.
All the kits I'm considering are rear drive and I'm currently leaning towards the 8fun motor. It's the second cheapest and I like the size and stealthiness of it. From what I've been reading it appears to be pretty quick too and will also allow me to thrown on a disc brake in the future. I know with the em3ev kit that I will get a better wheel, but I'm not sure if there are any other benefits of that kit and the wheel motor is also much more visible? The yescomusa kit has the obvious benefit of being super cheap! It has a higher wattage also, I'm not sure if that necessarily equals a faster motor.
I still need to figure out if I should use a rear torque arm with these kits and if so, is one sufficient, or do i need one for each side? Where is the cheapest place to get one? I'm also wondering if the e bike brakes are really necessary for a kit with this type of power. I would much rather just have some sort of a kill switch and use the brake levers i already have. I'm also wondering about the best way to hide the controller. I'm going to have a rear rack frame bag for my battery, but I've read the controllers get to hot to be put in a bag. Anyone have any creative solutions?
So far my bike build specs are as follows.
Nashbar 26mtb frame
Xt v-brakes w avid levers
Fork: still deciding between a rockshox tk 28, surly 1x1, or on one chromo fork.
X4 rear derailluer and shifter / 8 speed.
110mm stem
Vans ODI grips
Wellgo pedals
Fsa headset
Scott 700mm mtb bar
Raceface evolve dh Ss crank w external BB
1.75 mtb tires, will upgrade to a larger volume street tire as money allows.
Kits I'm considering:
1) GBK - 8fun BPM motor kit 36V500W for electric bicycle
Motor code
10
RPM
216
Throttle with LED or not
Twist throttle without LED display
Wheel size
26"
2) em3ev DD
500W Direct Drive Kit
- Motor Speed Rear 275rpm (220rpm loaded, 36V)
- Controller Type 9 fet 30A (36-75V, IRFB4110)
- Wheel Type 20" Alex DM18 CNC
- Spoke Type Sapim Upgrade (Silver)
- Throttle Type Half Twist
- Ebrakes Yes
3) Yescomusa 36v 800w kit
Approx. 30 KPH top speed
Provides you with a whole wheel with tire, not just the tire frame Takes less than an hour to install
The kit includes motorized wheel, motor controller, battery charger, thumb throttle, power break lever, wire harness
Quiet and reliable brushless gearless hub motor
Motor specifications: 36V / 800W / 350RPM
High motor efficiency: 75%
Motor diameter: 245mm
Drive system has no moving chains or gears, no friction, more efficient, less chance to break!
Brake shuts off motor automatically, saves energy, improves safety!
Thumb throttle with 3 LEDs indicator lights
Battery charger for charging lead-acid battery
Durable 600D Oxford cloth carrying bag along with a zippered main compartment for battery
It's for bicycle only.