LI-ghtcycle
10 MW
I have sorta a weird question lol!
I rode motorcycles for years, and I have just come to wonder if part of the reason it takes more room to u-turn on my 26" bicycle is the wheel size.
Also, I am looking to get the most all-around performance in my next e-bike build, and I have noticed people putting smaller rear wheels on.
On a motorcycle, the typical size on a high-performance sport bike is 17 inches.
Would putting a 20 inch rear hub motor or just a 20 inch wheel with rear disc mounted sprocket increase my acceleration considerably?
I don't want to hurt top speed TOO much, but I would like to put more emphasis on hill climbing and acceleration and still maintain 20 mph+ on the flat.
My concern is using the current Amped Bike 36v brushless 500watt rear hub motor on the bike I helped my father build, it struggles on steep grades (7%-9%)
and I would like to keep the bike at the legal limit of around 20 on the flat, but I'd really like more than 3-4 mph (motor power only) on the steep stuff.
Is it doable by decreasing my rear wheel diameter to gain some "gearing" (also looking to use a geared rear hub on my kit) for hill climbing?
Conversely, if I go with the smaller rear wheel, and a geared frame mounted motor driving a second sprocket on the disc break mount, what wheel/sprocket
combination would give me the optimal hill climbing ability and yet allow me 20 mph on the flat?
P.S. I am thinking either going with a high voltage set-up or high amperage, which ever is optimal for my needs, I have seen where some run 70+ volts and low
amps, or run 48 volts and high AH. I am currently considering 4 dewalt 28V a123 packs left intact, running 2 in series then those in parallel for 56volts and 9.2
AH (if my math is correct) with Kfong's circuits to use the battery's built-in BMS.
Any and all advice greatly appreciated!
I rode motorcycles for years, and I have just come to wonder if part of the reason it takes more room to u-turn on my 26" bicycle is the wheel size.
Also, I am looking to get the most all-around performance in my next e-bike build, and I have noticed people putting smaller rear wheels on.
On a motorcycle, the typical size on a high-performance sport bike is 17 inches.
Would putting a 20 inch rear hub motor or just a 20 inch wheel with rear disc mounted sprocket increase my acceleration considerably?
I don't want to hurt top speed TOO much, but I would like to put more emphasis on hill climbing and acceleration and still maintain 20 mph+ on the flat.
My concern is using the current Amped Bike 36v brushless 500watt rear hub motor on the bike I helped my father build, it struggles on steep grades (7%-9%)
and I would like to keep the bike at the legal limit of around 20 on the flat, but I'd really like more than 3-4 mph (motor power only) on the steep stuff.
Is it doable by decreasing my rear wheel diameter to gain some "gearing" (also looking to use a geared rear hub on my kit) for hill climbing?
Conversely, if I go with the smaller rear wheel, and a geared frame mounted motor driving a second sprocket on the disc break mount, what wheel/sprocket
combination would give me the optimal hill climbing ability and yet allow me 20 mph on the flat?
P.S. I am thinking either going with a high voltage set-up or high amperage, which ever is optimal for my needs, I have seen where some run 70+ volts and low
amps, or run 48 volts and high AH. I am currently considering 4 dewalt 28V a123 packs left intact, running 2 in series then those in parallel for 56volts and 9.2
AH (if my math is correct) with Kfong's circuits to use the battery's built-in BMS.
Any and all advice greatly appreciated!