azneinstein
100 mW
- Joined
- Jun 10, 2013
- Messages
- 42
So I've been wrapping my brain around this but there are so many factors that I wanted to see if I'm correct:
Affected Areas:
- Motor RPMs
- Cadence
- Top Speed
- Climbing Ability/ratio
- Motor Efficiency
- Motor Power Draw
- # of teeth engagement
- Wear/Maintenance
So I built a 29er SS currently with a lekkie 42t/20t but I have 38t-36t narrow wides along with a bunch of 20t/18t/16t rear but trying to figure out, at a equal "ratio" what would be better for a mid drive?
44t/22t:
- Higher top speed
- Lower Cadence
- Lower Motor RPM - More heat
- Less efficiency
- ***More power draw? I'm not sure on this one yet cause the initial at stop draw might be higher
- Climbing should be the same, just less cadence
- Less efficiency overall?
- More teeth engagement so less/no slippage and slightly more power transfer?
- Less maintenance cause less torque and more teeth to wear on
32t/16t:
- Less Top speed
- Higher Cadence
- Higher Motor RPM - Less Heat!
- More Efficient cause more spinning
- Less Power draw? But I think the initial at stop might be more
- Less teeth engagement
- More maintenance
So I know I can't have everything, but this is mainly a city cruiser/some slight hills but what sizing would you go with if it was you? I think a 25mph top speed is fine for this bike.
Affected Areas:
- Motor RPMs
- Cadence
- Top Speed
- Climbing Ability/ratio
- Motor Efficiency
- Motor Power Draw
- # of teeth engagement
- Wear/Maintenance
So I built a 29er SS currently with a lekkie 42t/20t but I have 38t-36t narrow wides along with a bunch of 20t/18t/16t rear but trying to figure out, at a equal "ratio" what would be better for a mid drive?
44t/22t:
- Higher top speed
- Lower Cadence
- Lower Motor RPM - More heat
- Less efficiency
- ***More power draw? I'm not sure on this one yet cause the initial at stop draw might be higher
- Climbing should be the same, just less cadence
- Less efficiency overall?
- More teeth engagement so less/no slippage and slightly more power transfer?
- Less maintenance cause less torque and more teeth to wear on
32t/16t:
- Less Top speed
- Higher Cadence
- Higher Motor RPM - Less Heat!
- More Efficient cause more spinning
- Less Power draw? But I think the initial at stop might be more
- Less teeth engagement
- More maintenance
So I know I can't have everything, but this is mainly a city cruiser/some slight hills but what sizing would you go with if it was you? I think a 25mph top speed is fine for this bike.