First build questions

truk9889

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Joined
Jun 25, 2022
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I'm looking to build my first ebike and was looking for some feedback. My ebike experience so far has been a Segway x260 and a Zugo rhino. I know what I want won't be street legal like the Segway and im totally fine with that. For the most part I ride around at about 25mph but like the power of the Segway. the zugo is a joke it does 28mph but takes forever to get there.
my goals for the ebike are:
Top speed around 35mph
Range around 20 miles
acceleration like the Segway which claims 0-30 in 4 seconds.
hub motor for stealth

My current thoughts are:
Grin V2 fast winding with a 20" wheel
20s4p battery with Samsung 21700 40T3 4000mah 50a continuous discharge
kelly 200a continuous 500a peak controller

im brand new to this so if theres a better way to do this im very open to suggestions. playing around with the motor simulator this gives me what I need but I just wanted to ask some people with experience in this field to make sure im not overlooking something

thanks
 
truk9889 said:
Top speed around 35mph
Range around 20 miles
acceleration like the Segway which claims 0-30 in 4 seconds.


My current thoughts are:
Grin V2 fast winding with a 20" wheel
20s4p battery with Samsung 21700 40T3 4000mah 50a continuous discharge
kelly 200a continuous 500a peak controller
truk9889 said:
around 300lbs

I think you may need more battery to hit your acceleration goal. It's currenrtly undersized for the controller you're looking at. Kelly controllers are rated in phase amps, and phase amps will be a max of 3x battery current, so you'd need around 70 battery amps to support the controller.

However, even with that, you may not have the acceleration you're looking for. Looks like you'd have about 8.8 mph/sec acceleration from the start, that drops to 5.6mph/sec by the time you hit 15mph and keeps dropping. Weight is a big factor, and you might be able to hit the 0-30mph goal if you lost around 50 pounds.

https://ebikes.ca/tools/simulator.html?motor=MGRIN_FST_SA&batt=cust_72_0.05_16&cont=cust_50_200_0.03_V&hp=0&axis=mph&frame=mountain&autothrot=false&throt=100&grade=0&wheel=20i&mass=136&cont_b=cust_70_200_0.03_V&motor_b=MGRIN_FST_SA&batt_b=cust_72_0.05_16&wheel_b=20i&mass_b=136&hp_b=0&bopen=true
 
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