Electric bike building
Tuesday 29 November 2016
Tuesday 25 October 2016
Friday 30 September 2016
Thursday 11 August 2016
Monday 4 July 2016
Friday 8 April 2016
my dream offroad ebike built up from scratch
The next option is to put a pitbike tyre on a bicycle wheel or just use the whole pitbike wheel as the starting point since it will be strong and the freewheels don't cut it on bicycles anyway for the amount of power we want to run.
The issues are the widths, axles etc.
12" 12 x 1.85 - 32 Spoke Rim, 7.5" (76mm) Wave Rotor Brake Disc ,39 Tooth 420 Sprocket, Kenda Carlsbad 80-100 - 12" Tire, Accepts 15mm Axle |
http://www.starproducts.com.au/products/jackshaft-kit-drive-shaft-19mm-12-tooth-41-pitch-sprocket-pillow-blocks/
The front end box would be designed to take something like 5 of these. At 20s 72v nominal 50a is more than enough to rip through extremely steep terrain.
a 4s pack is 200 x 90 x 40mm so times that by 5 and you have a square battery box of
20cm x 20cm with a width between the legs of less than 10cm!
http://www.hobbyking.com/hobbyking/store/__80906__Multistar_High_Capacity_4S_20000mAh_Multi_Rotor_Lipo_Pack_AU_Warehouse_.html
I do like this adapter for a freewheel and disc brake holes
I wonder what kind of geometry I could make out of carbon.
Sunday 3 April 2016
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