Store Under Maintenance, Apr 2nd - 12th 

Grin's storefront will be disabled until Monday while we rollout and test a number of system changes, and also catch up processing and shipping all the backlogged orders we have in the queue.  You should still be able to add items to your cart and have them ready to checkout when we re-enable the store on the 12th.  See our blog post for more details. 


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$1,289.00

    Add to Compare
  2. G310 Rear Minimal RTR Kit, Custom Wheelbuild

    From USD$439.00

    To USD$2,246.00

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  3. G310 Rear Ready-to-Roll Kit, Prelaced

    From USD$325.00

    To USD$2,005.00

    Out of stock
    Add to Compare
  4. G311 Front Minimal RTR Kit

    From USD$423.00

    To USD$1,743.00

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  5. G311 Front Ready-to-Roll Kit

    From USD$509.00

    To USD$2,351.00

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  6. GMAC Ready-to-Roll Kit

    From USD$830.00

    To USD$2,779.00 Regular Price USD$2,799.00

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  7. Rear Fatbike Ready-to-Roll Kit

    From USD$600.00

    To USD$2,512.00

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  8. SX1 Front Ready-to-Roll Kit

    From USD$544.00

    To USD$2,411.00

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  9. SX2 Rear Ready-to-Roll Kit

    From USD$535.00

    To USD$2,485.00

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  10. eZee Front Ready-to-Roll Kit

    From USD$910.00

    To USD$2,652.00 Regular Price USD$2,672.00

    Add to Compare
  11. NEW
    eZee Rear Ready-to-Roll Kit

    From USD$929.00

    To USD$2,729.00 Regular Price USD$2,749.00

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