wich choice motor qs273

[tahitiboob]

hello

I want to buy a motor qs273 but I do not know what T I should take for my use I have a sabvoton battery 20s 30AH

I would like pure speed 100 km / h so what to choose 3.5 t or 5T

thank you

 

[brumbrum]

The lower the turn count the higher the rpm. The motor will spin more times per volt

 

[spinningmagnets]

What diameter of tire?

 

[tahitiboob]

the wheel size is 18 inch

wich better 18 or 19inch?

 

[John in CR]

the wheel size is 18 inch

wich better 18 or 19inch?

16 or 17. Smaller wheel diameter is always better with direct drive hubbies unless you're primary use is longer distances at relatively constant high speed, but it's pretty rare that the savings in core losses of a lower rpm for a given speed exceed the savings in copper losses of lower current for the same thrust (or more acceleration for shorter duration ) due to lower gearing of the smaller wheel. Copper losses increasing by the square of current is a compelling thing compared to the relatively linear increase in core losses with rpm.

 

[tahitiboob]

thanks John for your answer the 16/17 inch rim is not available

I took 18 inches I tried to put a thin tire