- Mar 14, 2011
To get 330 lbs up a 30%+ grade hill using 26" Wheels and a RS 35 you'll need a minimum of a 55:1 reduction. Even on level ground pushing 330 lbs on 26" wheels requires a 18.75:1 reduction for a speed of close to 29 mph. For me 15.88:1 would only be a good down hill gear.Your installation is way to complicated and expensive. Long ago, I accomplished the
same result with my RS 35 using a simple $29 5:1 scooter gearbox with a 17T sprocket
driving a 54t sprocket for a 15.88 ratio. It's a double-sided right drive. The setup
drives the rear wheel so it's safe. I designed the motor mount with simple aluminum
and steel angle iron. It has always been very reliable without the use of expensive
staton parts and fun to ride. I'm planning right now beef up my motor mount for the
Now if you and your bike was a 100 lbs lighter than my bike and me on level ground only then that ratio may have been good for you. However here in Tennessee with only 1.6 hp at a 15.88 reduction you'll blow your engine or at the minimum burn the clutch out trying to climb a 30%+ grade hill.
When you use the system I've setup it then isn't complicated at all.
Load pulling, hill climbing
Aroundtown general use.
Open road use.
The only time chainrings will be shifted is when either using sprockets (3) or (5). All shifting is done with the left hand.
Next month I'll be modifying the trigger shifter to were the bottom lever will also be up top eliminating the need to reach to the bottom side of the shifter. This will be the shift knob. I also use a tachometer to know exactly when to shift gears.