The new SIMBB 29R electric bike frame just passed the rigorous Gates Belt Drive test for stiffness. The new frame is 38% stiffer than required by Gates and Rohloff Speed Hub to use the Gates belt drive with Rohloff. The stiffness test is done to insure the belt does not jump cogs during acceleration.
The extra stiffness is important with the SIMBB, as the SIMBB has 2.5 times the torque of the Bosch unit. This added torque gives higher acceleration but can also flex the frame more. So it is good that the new SIMBB frame is stiffer.
There have been other improvements to the SIMBB. It now has a 37 volt 15.5 amp hr battery (Up from 13 am hr). It also features a pedalec control.
There is also a “Bike Path” mode, where the speed is limited to 15mph, so you do not have to worry about going to fast on the bike paths.
The SIMBB just keeps getting stronger. It has more energy in the battery, more torque and power in the motor and is also packaged in a sleek module for low center of gravity and great handling. In the whole electric bike market, there is nothing like a SIMBB.