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G310 Rear Barebones Kit

Rear G310 Hub Motor Kit, Throttle Only System without a Display or PAS/Torque Sensors. Small, Silent, and Lightweight Geared Motor for Moderate Assist.

-30% OFF Promo- Use Coupon Code "G3FORME" at checkout

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From USD$438.00

To USD$2,134.50 Regular Price USD$2,249.50

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SKU
KIT-G310_Bare
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Customize G310 Rear Barebones Kit

The G310 motors are available in 2 different winding speeds (fast and standard) depending on how fast you need to go for a given wheel diameter and battery voltage. In most scenarios, we recommend the fast wind for 20" wheels and the standard winding speed for 26" and larger.

These motors have round axles (3/8" x 26 tpi) with internal tabbed washers to resist axle spinout, and given the lower torque capability of these hubs combined with the general thickness of rear bicycle dropouts that is usually sufficient. The round axles eliminate any opportunity for an external torque arm. 

Bafang G310 Standard Wind (8.5 rpm/V) Geared Rear Hub Motor with 9-pin Waterproof Higo Z910 Motor Plug with Combined Speed + Thermistor Signal.

Bafang G310 Standard Wind (8.5 rpm/V) Geared Rear Hub Motor with 9-pin Waterproof Higo Z910 Motor Plug with Combined Speed + Thermistor Signal.

You can get a bare hub and lace it into a suitable 36 hole rim yourself, or choose to get a professional wheel build done here at Grin using our stock rim selections and quality Sapim butted spokes.  Our head wheel builder 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 wheel build into your own rim and just require the spokes only, be sure to specify the required spoke length in the order comments to match your selected rim ERD and lacing pattern.

The Baserunner Z9 controller supports up to 55A peak phase currents and will be mounted neatly inside the cradle of our downtube batteries. If it is purchased with a flatpack or bottle battery we will terminate the short power leads with anderson powerpole connectors, and would recommend getting one of the optional mounting brackets.

The V3 Cycle Analyst and control switch is an integral part of this kit package. 

Grin Baserunner V6, - Flat Field-Oriented Waterproof Motor Controller for Battery Enclosures with Z910 Plug. 60V Max and 55A Peak Phase Currents (~30-35A Continuous). Full Product Information Page

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Grin Baserunner V6, - Flat Field-Oriented Waterproof Motor Controller for Battery Enclosures with Z910 Plug. 60V Max and 55A Peak Phase Currents (~30-35A Continuous). 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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Grin 12 LED Front E-Light, 72V Ready

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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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Your Customization
Ready to Roll Kit with G311 Front Motor, Downtube Battery, Baserunner Controller, PAS/Torque sensors etc.
G310 Rear Barebones Kit

In stock

USD$463.00

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Actual cruising speed/perfomance under any loading conditions is well modeled in our simulator.
Launch Motor Simulator with G310 Rear Barebones Kit

Summary
  • Motor Winding Option:
    1 x MG310_Std
  • Z9 Controller:
    1 x V6 Baserunner_Z9
  • Baserunner Controller Mount:
    1 x Reention battery baseplate, machined to fit Baserunner
  • All-in-one Throttle Style:
    1 x All-In-One Half Twist Throttle with Voltage LED (115cm Cable)

The small and silent G310 geared hub motor is a great choice for those who want a discrete motor to provide assistance while riding, without heavy hill climbing and hauling expectations. The helical cut gears are totally quiet and it freewheels with no motor drag when pedaling unassisted. If a downtube battery pack is selected, we will mount the baserunner controller inside the battery cradle for a very clean install.

The barebones system uses a throttle with an integrated on/off switch and voltage readout, but doesn't have a fully featured 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 optional ebrake cutoff sensor. 

For a full explanation of the various drop-down choices and a comparison of this package versus other motor options, see our Grin Kits Info Page

For details on this hub in particular, see the G310 Geared Motor Info Page