After spending a while reading everything I can on this forum and others I am starting my own build. I'm trying to create a freeride bike with a mid mounted hub design. Not really concerned about top speed, looking for something to help out with the uphill parts of the trails. With my amateur skills and a garage full of power tools what could go wrong
I'm using a white industries DOS freewheel sprocket on the crank. Motor, controller, and CA came from ebikes.ca. Using 1" square steel tubing as frame material. Any constructive comments are very welcome.
Crystalyte HS3540 rear hub motor
48V 12ah headway cell kit w/bms
Problem #1: Frame
From my reading the frame seems like the weakest link of the ebike. I guess normal bicycle frames just aren't up to the task for off-roading ebike stresses. So I'll be building my own. I've copied the geomerty of another freeride bike and gave it an tad bit more rake. I ordered enough supplies to make 3 frames, I figure the first two will be terrible.
Here are some of the first cuts...
All cuts done (except motor mounts), ready to tack and weld
Attached the bottom bracket shell and placed the motor inside the frame as a reference. I plan on welding a bar across the frame horizontally and mounting the motor directly to that. I plan on making some fiberglass cowelings to cover up the motor and make the bike look sharp.
Tomorrow I will be mounting the motor, welding the braces onto the frame, and hopefully starting on the swingarm.