DIY portable kickbike

[minim]

I've made a DIY longboard with 2x 2kW hub motors and a 12S4P samsung 30Q pack. Only I use this board and now I wan't to rebuild it into something that can be used by the family on vacation and that I can throw in the back of the car and use it while supercharging on trips. A portable scooter/kickbike like the ones in the pictures below would be perfect. I do have access to a industrial cnc machine, lathe, welding and so on. I also love DIY so I don't want something that's factory built/ready.

Since I have no clue about scooters/kickbikes does anyone have pointes for me? What's important? Should I do a build from scratch? It would be cool if I could re-use what I got but the hub motors I got now is only for 100mm wheels and top speed is like 60-70km/h at 12S and that sounds a tad overkill for a scooter/kickbike. Would love to have it so that it can be packed "flat" to take up less space.

 

[dogman dan]

Lots of electric scooters out there, but not as much in kits to convert them. Start by finding a motor wheel small enough, then look into both a controller for it, and a kick scooter with compatible wheel size. Or make one.


looks like lots of front hub motors for scoots on ebay, which on a kick scoot, would also mount rear just as good.

https://www.ebay.com/itm/Motor-24V-36V-48V-DC-Brushless-Toothless-8-Electric-Scooter-Hub-Wheel-200mm/132967149859?_trkparms=aid%3D555018%26algo%3DPL.SIM

 

[minim]

Those motors are rated at 350W.. I now run 60A motor max with 12S and run two of them. Need something with similar power or else I will try to find a way to use the ones I got. I have two Vesc6 speed controllers on my longboard and a 12S4p pack that will be reused. I don't intend to keep the longboard so will try to use as much as I can from that.

The frame and brakes is a bigger issue since I have no clue what to go for there. I'm considering using 3030 alu extrusions and a custom rear end but for the front it prolly is a hassle to make something good. Especially without knowledge about these things..


Edit:
Quick mockup of how it could be with the parts I got reusing the motors with 100mm wheels. Noe ideal wheels for a kickbike maybe.. Aaaand I need a frame to steal parts from since steering geometry/bearings and all that is not worth reinventing I think ^^

 

[dogman dan]

Somehow I missed that you wanted it that powerful. All my life I get called danger dan, but I'd be scared to ride a scooter 40 mph. (that would be running them at 100v though.

Two of those motors on the scoot would double it. those motors are rated for 350w, but its far from the limit of a direct drive motor. So you could easily run 1500w into one, and then run two of them. One front one back. Top speed would depend on the actual wind of the motor, so likely you'd be getting only 20 mph ish from 12s. But on 20s, they'd haul ass. 72v 20 amps controllers, would limit each motor to 1500w, and they could go a long way on that power level. Not forever, but till an 800 wh battery drained.


Won't cost much, to try one hub motor, and a 48v 30 amps controller on it. No fun though, compared to fabricating the whole thing. I'm a simpleton, and like easy solutions. Others like the solution as hard as possible, for the sheer fun of it.

 

[minim]

I forgot to mention that It's fun when there is some kick in it. I don't need it to be really fast but around 25mph would be nice.

Is it the heat that will be the limiting factor of them? I just assumed since it was rated that and 500w peak that running 1500W into them would give insta-magic-smoke.

 

[Bullfrog]

I like the idea but I'd suggest something with larger wheels.

Something like the Schwinn Shuffle and/or those offered at https://www.kickbikeus.com/ would be much more stable...especially at higher speeds.

Those little wheels don't roll over obstacles very well and the steering will tend to be extremely quick and unstable...been there done that and have the scars to prove it :lol: and that was without a motor.

I am currently trying to decide what motor to use on the rear of a Schwinn Shuffle...along with a 48v battery. The two best options I have found for a motor already laced in a 20" wheel are a "Leaf Bike" DD motor and a Shengyi SX1 Geared Hub Motor from Grin Tech. The Shuffle uses a 20" rear wheel and has a rear frame spacing of 100mm. I am shooting for about 20 mph on level ground :wink: .

 

[999zip999]

What's it like doing a wheelie on that with both your feet on it ?