hi,
I′m building an electric go-kart with an hpm-5000b motor @48v with 11′ wheels and I got stuck on sprockets. I would like a ratio that could allow me to reach a max speed of 30mph so I calculated that I need a gear ratio of 4.118 (70 axle/17 c̶l̶u̶t̶c̶h̶ motor side) with 3700rpm. But when I tried to search for sprockets on this motor, I found only sprockets for chains that would be too large for the axle(420 chain sprocket with 70 teeth for axle = 11′15" diameter), and that wouldn′t fit on the rear axle. So I wanted to ask, what should I do? With 219 chain 70 teeth would be ok, but then I can′t find a suitable sprocket for the motor. So should I send an inquiry for a custom sprocket in some shops around me or do you have another idea?
Thank you
I′m building an electric go-kart with an hpm-5000b motor @48v with 11′ wheels and I got stuck on sprockets. I would like a ratio that could allow me to reach a max speed of 30mph so I calculated that I need a gear ratio of 4.118 (70 axle/17 c̶l̶u̶t̶c̶h̶ motor side) with 3700rpm. But when I tried to search for sprockets on this motor, I found only sprockets for chains that would be too large for the axle(420 chain sprocket with 70 teeth for axle = 11′15" diameter), and that wouldn′t fit on the rear axle. So I wanted to ask, what should I do? With 219 chain 70 teeth would be ok, but then I can′t find a suitable sprocket for the motor. So should I send an inquiry for a custom sprocket in some shops around me or do you have another idea?
Thank you