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Grin Front Max45 All-Axle Barebones Kit

Grin Max45 Front Motor All-Axle Conversion Kit for Fatbikes. Throttle-Only System without a Display or PAS/Torque Sensors. Supports 135mm Quick Release and 150mm Thru-Axle Fatbike Forks. 

 

From USD$1,098.00

To USD$3,227.70 Regular Price USD$3,402.70

In stock

SKU
KIT-Grin-Fat_Bare
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Customize Grin Front Max45 All-Axle Barebones Kit

The Front Fat All-Axle motor is available in 2 different winding speeds; a slow 7.2 rpm/V option and a standard 9 rpm/V model. If sustained torque is the main objective, then we recommend the slower motor winding and a 52V or higher battery pack since the maximum phase current of the Baserunner/Phaserunner motor controllers will otherwise be the limiting factor in how much power you get.

There are axle adapter sets for conventional 135mm slotted dropouts and for 15x150mm thru-axle dropouts commonly used with fabike frames. The motor can also be mounted single sided by people with their own fabrication tools using a 16mm steel axle and the DIY SS torque arm. 

Front Max45 All-Axle Hub Motor for Fatbike Forks. Standard 4 turn (~9.0 rpm/V) Winding.

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Front Max45 All-Axle Hub Motor for Fatbike Forks. Standard 4 turn (~9.0 rpm/V) Winding.

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CNC Machined Torque Arm and Frame Clamp Assembly for the Front All-Axle Hub Motor

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CNC Machined Torque Arm and Frame Clamp Assembly for the Front All-Axle Hub Motor

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All-Axle Adapters for 135mm fatbike forks with slotted dropouts. For the Max45 motor model

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All-Axle Adapters for 135mm fatbike forks with slotted dropouts. For the Max45 motor model

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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 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, be sure to specify the required spoke length in the order comments to match your selected rim ERD and lacing pattern. If you require a wider rim than the ones we carry, you're welcome to source your own 32 hole fatbike rim and send it to us for your wheel build. Please get in touch with us to get an RMA # for the rim shipment.

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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60cm Motor Phase Extension Cable with Male and Female L1019 Plug

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60cm Motor Phase Extension Cable with Male and Female L1019 Plug

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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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Your Customization
Front Fat All-Axle Motor
Grin Front Max45 All-Axle Barebones Kit

In stock

USD$1,158.00

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Actual cruising speed/perfomance under any loading conditions is well modeled in our simulator.
Launch Motor Simulator with Grin Front Max45 All-Axle Barebones Kit

Summary
  • Front Fat Motor Speed:
    1 x Front Max45 All-Axle, Std
    SKU#: M-AA4504F
  • Front Fat AA Torque Arm:
    1 x Grin All-Axle Front Hub Torque Arm Kit
    SKU#: TA-GrinF
  • Front Fat AA Adapters:
    1 x Front Max45 135mm Quick Release Adapter
    SKU#: MP-F45QR9
  • L10 Controller:
    1 x V6 Baserunner_L10
    SKU#: C-BRLV6
  • L10 Extension Cable:
    1 x L10_Extension-short
    SKU#: W-L10_Ext-shrt
  • 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's Max45 All-Axle front hub motor kit has 66% more torque and power capability than our regular All-Axle motor and is compatible with most fatbike forks. The Barebones kit uses a simple all-in-one throttle with voltage readout and no fancy display or option for torque sensors.  

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 or Superharness kit system.

  • Motor is compatible with both 135mm quick release and 150mm thru-axle forks using appropriate adapter set. 
  • Powerful 45mm wide motor stator but weighs just 6.0 kg.
  • Statorade injection port for maximum cooloing option.
  • L10 connector with internal thermistor