What do parameters like Torque (Nm) mean for ebikes?

Motor Torque is the characteristic which reflects the traction (thrust) and is important for climbing up hills.

  • The traction force equals Torque divided by wheel radius (F=T/R).
  • The more torque at the wheel gives you a higher grade-ability.
  • The smaller wheel diameter gives a higher traction force or climb-ability with same motor torque.

The torque at the wheel for mid-drive motors should be calculated like this:

  • Max Torque at Wheel for crank motors = Max Motor Torque x Number of rear cog teeth / Number of Chain wheel teeth

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