We have Moved! 

After heroic efforts by the team here Grin is now operating out of our new 14,000 square foot facility on Odlum Drive.  Basic orders are being shipped out again and more complex kits and wheelbuilds should start moving the first week of February. 


Geared RTR

Grin's Ready-to-Roll (RTR) kits are largely pre-configured hub motor packages that include a downtube battery pack with an integrated Baserunner Motor Controller. They are clean to install and use our new waterproof CA3-WP device with integrated handlebar switch for turning the system on and off and adjusting pedal assist levels. See the RTR Intro Video or the Kits Summary Page for details on the motor choices, and the Advanced PAS Page to understand the PAS and Torque sensors.

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  1. Brompton Geared Motor Ready-to-Roll Kit

    From USD$579.00

    To USD$1,188.00

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  2. G310 Rear Minimal RTR Kit, Custom Wheelbuild

    From USD$224.00

    To USD$1,685.00

    Out of stock
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  3. G310 Rear Ready-to-Roll Kit, Prelaced

    From USD$325.00

    To USD$1,659.00

    Out of stock
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  4. G311 Front Minimal RTR Kit

    From USD$243.00

    To USD$1,443.00

    Out of stock
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  5. G311 Front Ready-to-Roll Kit

    From USD$344.00

    To USD$1,805.00

    Out of stock
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  6. Rear Fatbike Ready-to-Roll Kit

    From USD$600.00

    To USD$2,146.00

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  7. SX1 Front Ready-to-Roll Kit

    From USD$329.00

    To USD$1,830.00

    Out of stock
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  8. SX2 Rear Ready-to-Roll Kit

    From USD$550.00

    To USD$2,119.00

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