Language
International
  • Compare ()
  • Create an Account
  • Sign In
Toggle Nav
Search
Advanced Search

Grin Front Max45 All-Axle CA3 Kit

Grin 's Max45 All-Axle Cycle Analyst Based Conversion Kit for Fatbike Forks (135mm Quick Release and 150mm Thru-Axle). With Lithium Battery, Baserunner L10 Controller or Phaserunner Controller, and PAS/Torque Sensor Options. 

 

From USD$1,220.00

To USD$3,612.50 Regular Price USD$3,787.50

In stock

SKU
KIT-Grin-Fat_CA3
Add to Wish List Add to Compare
Customize Grin Front Max45 All-Axle CA3 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.

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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. 

New Model 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).   

Click Here for detailed product info page

New Model 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).   

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

The V3 Cycle Analyst is an integral part of this kit system that ties together the throttle, ebrake, PAS, and torque sensor signals into a highly configurable platform that can be readily customized for a range of performance behaviors you can't get anywhere else. As a display it may look a tad clunky, but the functionality it offers is simply unparalleled and continues to increase with each new firmware release.

CA3-WPx

V3 Direct Plug Cycle Analyst with Waterproof 8 Pin HiGo CA Plug for Ready to Roll Kits.110 cm cable length. Mounting bracket not included. 

Click Here for detailed product info page

V3 Direct Plug Cycle Analyst with Waterproof 8 Pin HiGo CA Plug for Ready to Roll Kits.110 cm cable length. Mounting bracket not included. 

Click Here for detailed product info page

CA3_MFSwitch for CA3-WPx

Multifunction Switch for CA3-WP, with On/Off Power, Up/Down Digital Aux Buttons, and Screen Toggle. 45 cm cable length.

Click Here for detailed product info page

Multifunction Switch for CA3-WP, with On/Off Power, Up/Down Digital Aux Buttons, and Screen Toggle. 45 cm cable length.

Click Here for detailed product info page

Stainless Steel Mounting Plate for Attaching CA to Bicycle Steer Tube

Click Here for detailed product info page

Stainless Steel Mounting Plate for Attaching CA to Bicycle Steer Tube

Click Here for detailed product info page

Throttles, ebrake levers, pas sensors, and torque sensors all play a roll in how you interact with the ebike. Torque and PAS sensor automatically power the bike whenever you pedal with an assist level controlled by the CA3's MFSwitch, while a throttle gives manual control. Please see our PAS info page for more details on these options

Even if you choose a PAS or Torque sensor as the primary control, we always recommend having a throttle as well. It can be handy to accelerate in tight situations and is great as a back-up if ever the pedal sensor has issues.  

Regenerative Braking can be controlled with the addition of an ebrake lever, using the throttle to modulate the signal, or it can also be activated through back-pedal crank's rotation. 

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.  

Click Here for detailed product info page

Bike tracker that works with Apple Find My  

Click Here for detailed product info page

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.

Click Here for detailed product info page

Grin 12 LED Front E-Light, 72V Ready

Click Here for detailed product info page

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.

Click Here for detailed product info page

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  

Click Here for detailed product info page

180cm DC Accessory Extension Cable

Click Here for detailed product info page

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

Click Here for detailed product info page

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

Click Here for detailed product info page

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. 

Click Here for detailed product info page

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

Click Here for detailed product info page

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. 

Click Here for detailed product info page

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

Click Here for detailed product info page

Schwalbe Big Apple 26" x 2.15 Puncture Resistant Tire. 

Click Here for detailed product info page

* Required Fields

Your Customization
Grin Front Max45 All-Axle CA3 Kit
Grin Front Max45 All-Axle CA3 Kit

In stock

USD$1,269.00

Unable to add to cart because these items are out of stock:

Actual cruising speed/perfomance under any loading conditions is well modeled in our simulator.
Launch Motor Simulator with Grin Front Max45 All-Axle CA3 Kit

Summary
  • Front Fat Motor Speed:
    1 x Front Max45 All-Axle, Std
  • Front Fat AA Torque Arm:
    1 x Grin All-Axle Front Hub Torque Arm Kit
  • Front Fat AA Adapters:
    1 x Front Max45 135mm Quick Release Adapter
  • L10 Controller:
    1 x V6 Baserunner_L10 ETA: Apr 2 2025 (backordered)
  • L10 Extension Cable:
    1 x L10 Extension Cable (60cm)
  • Baserunner Controller Mount:
    1 x Reention battery baseplate, machined to fit Baserunner
  • V3 Cycle Analyst:
    1 x CA3-WPx
  • Auxiliary Input and Power Switch:
    1 x CA3_MFSwitch for CA3-WPx
  • CA Mounting Bracket Style:
    1 x Steer Tube Mounted Bracket for Cycle Analysts

Grin Max45 All-Axle front hub motor kit has 66% more torque and power capability than our regular All-Axle motor and is compatible with both 135mm quick release ane 150x15mm thru-axle fatbike forks. The CA3 kit comes with your choice of battery packs, PAS/Torque sensor options, and various means of regenerative braking control. 

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