Grin Technologies GMAC Installation Manual

Thanks for your purchase of a GMAC motor kit! This motor has a number of
unique features that set it aside from other direct drive and geared motor kits
available on the market.
Locked Clutch: Allows for effective and efficient regenerative braking
•
down to very low wheel RPMs. When used with a Phaserunner
controller for virtual freewheeling, the drag torque present when pedaling
without assist can also be eliminated as well.
Round 10mm Axle: By using a round 10mm axle, the hub fits properly
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inside the bicycle dropout slot and the disk rotor aligns properly with
industry standard
Integrated Torque Arm: An integrated torque arm on the splined portion
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of the motor axle allows for zero play installations to handle forwards
and regen torques without any slop. It also eliminates torque
transmission and spreading forces on the dropout slot and transfers this
force to a securely to the chainstays with a pair of hose clamps.
Side Cable Exit: Better protects electrical wire from damage and
•
provides flexibility for axle hardware changes.
GMAC Installation Guide
Rev 1.0