ModeratelyFastF
10 mW
- Joined
- Feb 2, 2018
- Messages
- 28
Edit: A preview of where this build ended up:
Q100C motor
S12S BMSBattery controller
SLCD3 display
EM3EV 52V 721Wh battery
Original post:
Hi all, I'm looking to build a reliable, lightweight, discrete commuter build. Ideally it would be full stealth: silent, motor so small most people would miss it, and small battery in a bag on the frame that isn't obviously a battery. Here are the constraints:
Desired max speed on level ground: 40-45km/h
Desired max range at what cruising speed: 32km (20mile) round trip commute (ie 16km each way). Would like to average 35km/hr.
Wheel size: 700c
Base bike: 12kg aluminium road bike with 135mm drop outs
Brake type: V-brakes
Rider weight: 80kg + 5kg bag = 85kg load
Riding style: I will be peddling - currently average 25kph/15mph over my commute (and about 32kph on the flat)
Terrain: mostly flat, some short hills under 15% grade
Budget: something reasonable!
I don't have any experience putting ebikes together (or for that matter regular bikes beyond basic maintenance) so I probably need some hand holding. Here is my plan so far:
My questions:
Any help appreciated!
Q100C motor
S12S BMSBattery controller
SLCD3 display
EM3EV 52V 721Wh battery
Original post:
Hi all, I'm looking to build a reliable, lightweight, discrete commuter build. Ideally it would be full stealth: silent, motor so small most people would miss it, and small battery in a bag on the frame that isn't obviously a battery. Here are the constraints:
Desired max speed on level ground: 40-45km/h
Desired max range at what cruising speed: 32km (20mile) round trip commute (ie 16km each way). Would like to average 35km/hr.
Wheel size: 700c
Base bike: 12kg aluminium road bike with 135mm drop outs
Brake type: V-brakes
Rider weight: 80kg + 5kg bag = 85kg load
Riding style: I will be peddling - currently average 25kph/15mph over my commute (and about 32kph on the flat)
Terrain: mostly flat, some short hills under 15% grade
Budget: something reasonable!
I don't have any experience putting ebikes together (or for that matter regular bikes beyond basic maintenance) so I probably need some hand holding. Here is my plan so far:
- Buy Q128c 48V 328rpm 700c wheel from BMS Battery: https://bmsbattery.com/ebike-kit/76...l-ebike-kit.html?search_query=q128c&results=2
- Buy 48V 11.6ah battery with integrated 20a controllerhttps://bmsbattery.com/ebike-battery/680-48v116ah-bottle-09-panasonic-battery-pack-battery.html
- This includes: Battery, S-LCD3 display, One Thumb throttle, A pair of Brake Grip, One PAS And Waterproof Easy Assemble Wires
My questions:
- I have a 10sp shimano cassette, can I just swap that onto the wheel from BMS?
- To install the PAS sensor do I need special tools?
- Will that motor work ok in 700c wheels, or is it going to overheat if I can't keep my average speed up? At present I average 25kph over the whole commute, and I'd hope to at least average 30kph with the motor.
- If I take the battery off can I ride it like a normal bike, or will the Q128c create a lot of friction/drag? If so I might get a second 10sp cassette so I can swap the whole wheel over if required.
- Is that battery ok, or is it overkill for my commute? If I could get by with a smaller battery I could hide in a bag that would be even better, but I understand that would involve getting a separate controller.
- Is there anything else I need to make this work?
Any help appreciated!