Worksman Cycle, 1HP/2HP 48V/96V E-conversion

I have a setup similar to above but with steel-mesh fold-able panniers and front drum brake. 12V automotive-grade LED lights currently running off 9V batteries. Also have extra-thick 11G SS spokes w/ thick aluminum rims and 2.5" kevlar-belted tires. Beastie weighs in around 60lbs before my ass sits on it. I plan on using a 130 VDC FF 1.0 AOM 2.50 HP 6700 RPM 18 AMPS BLDC Treadmill Duty motor frame-mounted. 2X Pingbattery 48V 30AH V2.5 LiFePO4 Battery Pack with series and parallel wiring plugs. Sensitron SMCS6M40-25 hermetically-sealed controller 150V Nominal, 250V Peak, 30A Nominal, 40A Peak, 35Rds(on) ID =20A. Can anyone tell me what kind of gear ratio I should be looking at on this motor? I figure at 48V the motor should put out the legal limit of 750W, when I plug in the 96V arrangement (off-road of course) it should really start to kick-butt. Any ideas on range? I figure about 50 miles @48V going 20mph and about 25 miles @ 96V going around 35mph. I would like to be able to do a 30 mile round-trip commute on it.

Welcome to the forum. Looks like a nice bike.

Your tire will be turning roughly 250 RPM at 20mph. Your chosen motor has a KV of 51.5, Or in laymens terms, for every volt the motor will turn 51.5 RPM. At 1 volt, 51.5rpm. At 10 volts, 515 rpm. At 48 volts, its turning roughly 2500 rpm (2472). So you need a 10:1 gear ratio to go 20mph at 48V

Thanks, a nice round number. Does anybody have any experience with the Sensitron controllers? There is not very much information about it aside from bare specs on the website.

60ah of Ping will be heavy.

did you ever get anywhere with the project? I just started a smiliar concept. except i have a 2.5 hp motor and 4,000rpm setup wanting to run 60volts with a turbo to hit 72 volts. but still parting pieces together for my 29er. interested to see progress. Will be plugging in motor to pike soon to see what kind of power I get at 12, 24, 36 volts without controller for testing soon.