Superharness and Display Bundle

This Main9 Superharness is much more than a brakeout cable, this device features an integrated PCBA that overcomes many of the limitations that are present in the stock ASI controllers and provides unique regen braking functionality previously available only with a Cycle Analyst. 

That includes:

• Support for Bidirectional Throttles
• Support for Digital Ebrake with Throttle Modulation
• Support for Proportional Analog Regen Ebrake Levers

Connectors:

• 5 Pin Female Higo : Connects to ebike displays using KM5s protocol.
• 4 Pin Female Higo : Ebrake plug supports both digital brake cutoffs plus 1-4V proportional brake levers or throttles as regen control source.
• 3 Pin Female Higo : Throttle plug. Supports conventional 1-4V hall effect throttles and bidirectional throttles with 0-1V regen range.
• 5.5x2.1mm DC Front Light: Front light power can supply up to 2A of current and is controlled from display.
• 5.5x2.1mm DC Rear Light: Rear light power blinks in normal use and goes steady while braking.

Please see this video if you are planning to retrofit an older Grin system to use a Superharness instead. All V6 Phaserunner and Baserunner controllers sold before Dec 2023 have V6.023 firmware which would need to be upgraded to 6.025 firmware to work properly.  Integration with V4 and V5 Baserunner controllers or Frankerunner controllers is possible in principle but much more limited in function due to ASI's V5.9X codebased and a shared communication port.