Gear ratio on chain drive

[Easy-pd]

I’m using 6s on a 236kv motor. 9” wheels.

I am limited on space with the scooter I am building so it has to be 6mm chain drive I think.

The motor shaft is 6mm, so as far as I can see, I can go up to max 12 teeth front with a sprocket that has grub screws. If this is too small, can anyone link me to others with grub screws for the motor shaft?

Would 12 teeth work up front and what do I need for the rear? I want a good pairing of torque and speed to make it fun.

 

[mjcrow]

Nice online calculator here https://electricscooterparts.com/motorwheelgearratio.html for top speed and gear ratios.
I get my motor gears from aliexpress, lots of choice just make sure you get the shaft diameter and chain size right when ordering.

 

[Easy-pd]

Thanks for that. I have a motor and most of the parts to do the build from previous projects. The only thing I really need is the sprockets and chain. Due to this, I need to use a 6mm motor shaft, which looks like it limits choice on a front sprocket. The best choice on here is 16-36 teeth I think, but I can only find up to 12 teeth for a 6mm bore

 

[mjcrow]

When you say you need to use a 6mm chain, do you mean #25 or 04C chain which has a 6mm height? If so, then do a search for 04C gears with a 6mm bore, there should be plenty on ailexpress or ebay.
Chain and sprocket ES sticky here https://endless-sphere.com/forums/viewtopic.php?t=46630

 

[Easy-pd]

Perfect, I didn’t realise there was different names for the same thing. Thanks!