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Grin Rear All-Axle Barebones Kit

Rear Ready-to-Roll All-Axle Motor Kit, Throttle Only System without a Display or PAS/Torque Sensors. Supports 135x9 Quick Release and 142x12 and 148x12 Thru Axle dropouts.

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From USD$913.00

To USD$3,244.70 Regular Price USD$3,419.70

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SKU
KIT-GrinR_Bare
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Customize Grin Rear All-Axle Barebones Kit

The rear motor is available in 3 different winding speeds depending on how fast you need to go for a given wheel diameter and battery voltage. For 48V systems we recommend the slow wind for 26"-29" wheels and the standard wind for 20" wheels. For 36V batteries we recommend the standard wind for 26-29" and fast wind for 20".

The new V3 model comes with a built-in torque sensing freehub. The Shimano HG spline is the standard, while the the SRAM XD freehub option permits the use of high-end 1x cassettes with small 10T cogs.

Statorade is recommended if you anticipate using the motor on lots of hills or in cargo applications
There are a range of axle adapters available for different quick release and thru-axle fork standards.

V3 Torque Sensing Rear All-Axle Hub Motor. Black. Standard 6 Turn (~10 rpm/V) Winding. Shimano HG Freehub.

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V3 Torque Sensing Rear All-Axle Hub Motor. Black. Standard 6 Turn (~10 rpm/V) Winding. Shimano HG Freehub.

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V3 Rear Grin All-Axle Torque Arm Kit

CNC Machined Torque Arm and Frame Clamp Assembly for V3 Rear All Axle Hub Motor (Not Compatible with V2 Hubs)

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CNC Machined Torque Arm and Frame Clamp Assembly for V3 Rear All Axle Hub Motor (Not Compatible with V2 Hubs)

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V3 Rear All-Axle Motor Adapters for Standard 135mm (QR) Slotted Dropout

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V3 Rear All-Axle Motor Adapters for Standard 135mm (QR) Slotted Dropout

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You can get a bare hub and lace it into a suitable 32 hole rim yourself, or choose to get a professional wheelbuild done here at Grin using our stock rim selections and quality Sapim butted spokes.  Our head wheelbuilder Robert has decades of experience and is renowned for building wheels that are nearly bombproof.

If you want Grin to do the wheelbuild, be sure to select either the Silver or Black spoke option from the dropdown menu, along with your preferred rim. By default all wheels will be be dished with the rim dead center between the dropouts, if you require some special dishing offset for an oddball frame please mention that in the order comments. If you are doing your own wheelbuild into your own rim, be sure to specify the required spoke length in the order  comments

The Baserunner controller is ideal if you are getting a downtube battery as we will mount it inside the battery cradle.  The larger Phaserunner is required if you need an option that can run up to 72V, or if you are using one of the other battery models. It will also produce slightly higher peak torque due to the 90A vs 80A max phase current. 

V6 Baserunner_L10 Field Oriented Motor Controller. Flat Profile Fits Many Downtube Battery Enclosures. L1019 Motor Plug. 80A Peak Phase Currents (~45-50A Continuous), for 24-52V Batteries (60V Max Input).  Full Product Information Page

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V6 Baserunner_L10 Field Oriented Motor Controller. Flat Profile Fits Many Downtube Battery Enclosures. L1019 Motor Plug. 80A Peak Phase Currents (~45-50A Continuous), for 24-52V Batteries (60V Max Input).  Full Product Information Page

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Aluminum Controller Mount for Reention Poly-DPxC Series Downtube Batteries, Machined to fit Baserunner Motor Controllers

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Aluminum Controller Mount for Reention Poly-DPxC Series Downtube Batteries, Machined to fit Baserunner Motor Controllers

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The Barebones kit includes a throttle with a built-in voltage display and on/off switch. The twist throttle option also includes two additional cables, a DC jack for powering a front light and a 4pin JST plug for hooking up an ebrake cutoff lever.
The ebrake cutoff in this sytem overrides the throttle and sends out 0.4V to the motor controller's throttle input, which with default controller settings will command about 50% of maximum regen. There is no way to proportionally modulate the regen braking capabilities in the Barebones kit system. For that functionality a CA3 kit is required instead.

Half Twist Throttle with Integrated On/Off Power Switch and Voltage Indicator. Connects to Main9 Connector of Baserunner or Phaserunner Controllers for Systems with No Cycle Analyst or Display. 115cm Cable Length for Main9 Connector

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Half Twist Throttle with Integrated On/Off Power Switch and Voltage Indicator. Connects to Main9 Connector of Baserunner or Phaserunner Controllers for Systems with No Cycle Analyst or Display. 115cm Cable Length for Main9 Connector

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The kit will run with any battery pack from 24V to 52V nominal (and up to 72V with a Phaserunner).
We offer a range of batteries that will work well depending on the geometry of your bike, the range you need on a charge, and how fast you want to go.  Please see our battery info page for more details on the different pack options.  
Be sure to select a charger model that matches the voltage (36V, 48V, or 52V) and connector style (ST3 or XLR) of the chosen pack.  

There are a number of optional electronic and mechanical accessories that can help flush out the build. This includes front and rear bike lights, phone chargers, wire management, programming cables, and what have you. 

Handlebar Phone Mount with both Wireless and USB Charging, Wide 12-95V Input Range.  

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Bike tracker that works with Apple Find My  

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Wide Voltage Range (6-60V), 3 watt Ebikes Light, Fork Fender mounting. 50cm cable, 5.5x2.1mm DC Jack. On/off Switch, Powers off Cycle Analyst/Anderson Tap. StVZO Compliant.

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Super Bright (Max 1900 Lumen) Ebike Light with Handlebar Button and Hi/Low Beam Modes and Daytime Run Lights as Well. 12-60V Input Range with Reflective Cutoff Optics. Plugs Directly to Cycle Analyst.

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Main9 to DC 5.5mm x 2.1mm Male Adapter, 1m long. Provides Convenient Power Source for Rear Bike Lights from Unused Main9 Plug in Controllers with V3 Cycle Analyst  

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180cm DC Accessory Extension Cable

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Rear Ebike Light, No On/Off Push Button, 6-60V Input Range with DC 5.5x2.1mm DC Jack. 

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Parallel Anderson Cable for Baserunners Installed in Reention Case. Simplifies Dual Controllers or Dual Battery Systems.  Must be purchased with Baserunner and Reention battery

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4 Pieces of Snap Together Black Plastic Cable Raceway, 15 and 20mm Wide, 50cm long. Self Adhesive Tap Bonds to Bicycle Tube, Perfect for Hiding Cable Runs. 

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Cable Bundling Kit, includes Spiral Wrap, Zip Ties, and Velcro Sleeves

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Laser Engrave 250 Watt Continuous Power Rating on Motor Side Plate.  This is Truthfull. ALL Hub Motors Offered by Grin Have an Operating Point (RPM and Allowable Temperature) Where They Can Only Sustain 250W. 

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3m Long TTL-> USB programming cable for Satiator, Baserunner, Phaserunner and Cycle Analyst. *Note: All kits come pre-programmed, and most system behaviour is configurable with the Cycle Analyst buttons. But this cable is necessary if you plan to change more advanced controller settings or update device firmware* Full Product Info

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Schwalbe Big Apple 26" x 2.15 Puncture Resistant Tire. 

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Motor Freehub Side View
Grin Rear All-Axle Barebones Kit

In stock

USD$1,053.00

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Actual cruising speed/perfomance under any loading conditions is well modeled in our simulator.
Launch Motor Simulator with Grin Rear All-Axle Barebones Kit

Summary
  • Rear Motor Model:
    1 x V3 Rear All-Axle, Std HG
    SKU#: M-AA2706R_THG
  • All-Axle Rear Torque Arm:
    1 x V3 Rear Grin All-Axle Torque Arm Kit
    SKU#: TA-GrinR_V3
  • Rear Axle Adapters:
    1 x 135mm (QR) Slotted Dropout Rear Adapters for V3
    SKU#: MP-RQR_135
  • L10 Controller:
    1 x V6 Baserunner_L10
    SKU#: C-BRLV6
  • Baserunner Controller Mount:
    1 x Reention battery baseplate, machined to fit Baserunner
    SKU#: CP-BPReen
  • All-in-one Throttle Style:
    1 x All-In-One Half Twist Throttle with Voltage LED (115cm Cable)
    SKU#: T-HT_AIO

Grin All-Axle rear hub motor kit with optional battery pack and your choice of a Baserunner or Phaserunner motor controller.  If a Baserunner controller is selected along with a downtube battery pack, we will mount the controller inside the battery cradle for a very clean instal.

Motor works with both 12mm thru axle and regular quick release slotted dropouts by selection of the right insert and weighs just over 4kg. Features 0.35mm laminations, a Statorade injection port, and uses a Shimano HG compatible freehub.

The barebones system uses a throttle with an integrated on/off switch and voltage readout that is compatible up to 72V, but doesn't have a proper display or options for PAS / Torque sensors. This makes it great for simple and clean ebike builds that want to avoid any additional complexity.

The throttle also includes two extra wires for running a front bike light and hooking up an ebrake sensor.  The ebrake levers provide a fixed level of regenerative braking which is OK, but not quite as nice as the varying proportional regen that is possible with a V3 Cycle Analyst.