Hello everybody,
it is about year ago, when i completed my first ebike. As a donor bike i used old secondhand steel hardtail mtb with crappy fork.
Then i added magicpie hub motor, 48v 20ah Panasonic 18650PF battery pack, magicpie external controller, thumb throttle and over time changed lot of bicycle parts. And after year it looks this
It is reliable fun commuter, even my commute to work is around 2km, i usually take ride around 20 to 40km just for fun. Max speed around 40km/h, range without pedalling with full throttle and smile on face between 40-50km to the cut off (of course i do not discharge battery this deep often).
But there are some issues that cant be elegantly fixed on that platform and i also want better performance (better acceleration, top speed around 60km/h, no-pedal range at 40km/h with rare blasts to full throttle at least 100km to the cut off). I wanted better fork, with single crown to keep build look still like bicycle and thru axle and sadly, these days there arent much options without taper steerer tube and this frame has too narrow headtube to fit them. Furthermore, the triangle is too small to fit adequate battery to meet my requierements. Because i dont trust aluminium frame running with heavy hub motor, because there arent any steel standart bicycle frames that can accept taper steerer tube (except special expensive custom frames) and because i didnt want to pay 500 dollars for plain chinese stealth bomber frame clone, which is price here, shipped and taxed or around 900 dollars for qulbix, i decided to build my own steel heavyduty hardtail frame with thick clamping dropouts, generous battery room and 44mm ID headtube, that can accept taper forks. I started with some sketches, this is first versions, final version with multiple modifications was ruined within the frame building. Geometry was stolen from previous bike and modificated.
I also bought new, stronger and better motor, MXUS V3 4T laced in 18x1,6" moped rim and 90/90 tire.
Then i bought some square steel tubes 40x40x2mm for main triangle, 40x20x2mm for the tail, L-shaped 20x20x3mm steel for battery and saddle mounts, piece of 16x40mm steel for dropouts, straight cromoly 44mm ID headtube and 73mm cromoly BSA bottom bracket housing. First i cut tubes, battery and saddle mounts and milled dropouts.
Next i had to call my colleague with mag welder to get all together. It was real guerilla welding, so the geometry may not be excellent, but it looks nukeproof and that was goal.
Some painting....
Almost done...
That is all for now, thanks for reading and sorry for my bad english.
it is about year ago, when i completed my first ebike. As a donor bike i used old secondhand steel hardtail mtb with crappy fork.
Then i added magicpie hub motor, 48v 20ah Panasonic 18650PF battery pack, magicpie external controller, thumb throttle and over time changed lot of bicycle parts. And after year it looks this
It is reliable fun commuter, even my commute to work is around 2km, i usually take ride around 20 to 40km just for fun. Max speed around 40km/h, range without pedalling with full throttle and smile on face between 40-50km to the cut off (of course i do not discharge battery this deep often).
But there are some issues that cant be elegantly fixed on that platform and i also want better performance (better acceleration, top speed around 60km/h, no-pedal range at 40km/h with rare blasts to full throttle at least 100km to the cut off). I wanted better fork, with single crown to keep build look still like bicycle and thru axle and sadly, these days there arent much options without taper steerer tube and this frame has too narrow headtube to fit them. Furthermore, the triangle is too small to fit adequate battery to meet my requierements. Because i dont trust aluminium frame running with heavy hub motor, because there arent any steel standart bicycle frames that can accept taper steerer tube (except special expensive custom frames) and because i didnt want to pay 500 dollars for plain chinese stealth bomber frame clone, which is price here, shipped and taxed or around 900 dollars for qulbix, i decided to build my own steel heavyduty hardtail frame with thick clamping dropouts, generous battery room and 44mm ID headtube, that can accept taper forks. I started with some sketches, this is first versions, final version with multiple modifications was ruined within the frame building. Geometry was stolen from previous bike and modificated.
I also bought new, stronger and better motor, MXUS V3 4T laced in 18x1,6" moped rim and 90/90 tire.
Then i bought some square steel tubes 40x40x2mm for main triangle, 40x20x2mm for the tail, L-shaped 20x20x3mm steel for battery and saddle mounts, piece of 16x40mm steel for dropouts, straight cromoly 44mm ID headtube and 73mm cromoly BSA bottom bracket housing. First i cut tubes, battery and saddle mounts and milled dropouts.
Next i had to call my colleague with mag welder to get all together. It was real guerilla welding, so the geometry may not be excellent, but it looks nukeproof and that was goal.
Some painting....
Almost done...
That is all for now, thanks for reading and sorry for my bad english.