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SX2 Rear with Regen Mod CA3 Kit

Rear 250-500W SX2 CA3 Kit, with a welded clutch for regen, V3 Cycle Analyst, Downtube battery, PAS/Torque sensor options.

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From USD$670.00

To USD$2,908.10 Regular Price USD$3,083.10

In stock

SKU
KIT-SX2_RG_RTR
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Customize SX2 Rear with Regen Mod CA3 Kit

The SX 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.

Because of the high torque capability of these geared motors combined with the smaller diameter M12 axle, the use of a torque arm to prevent axle spinout is essential.  

SX2 Fast Wind

Rear Casette Hub Motor with Helical Gears, Fast (~9.8 rpm/V) Winding. Includes 9 Pin Z910 Cable with Combined Speed + Thermistor Signal.

Rear Casette Hub Motor with Helical Gears, Fast (~9.8 rpm/V) Winding. Includes 9 Pin Z910 Cable with Combined Speed + Thermistor Signal.

V7 Regen Torque Arm 12mm

V7 Torque Arm with Machined Clamping Block for Regen Hub Motors. Fits M12 Axles in both Front and Rear Installations. Must be Installed on Solid Axle (No Cable) for Full Strength. Also Available on Amazon for US Customers

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V7 Torque Arm with Machined Clamping Block for Regen Hub Motors. Fits M12 Axles in both Front and Rear Installations. Must be Installed on Solid Axle (No Cable) for Full Strength. Also Available on Amazon for US Customers

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Lock Clutch Mod

Weld Clutch for Regenerative Braking Capability in Geared Hub Motor and Assemble with Loctite 648. LAST UNITS LEFT Moving to CNC machined fixed planet carriers, no more welding. 

Weld Clutch for Regenerative Braking Capability in Geared Hub Motor and Assemble with Loctite 648. LAST UNITS LEFT Moving to CNC machined fixed planet carriers, no more welding. 

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. 

V6 Baserunner_Z9 Field Oriented Motor Controller, Compatible with New Superharness Kit System. Flat Profile Fits Many Downtube Battery Enclosures. Z910 Motor Plug. 55A Peak Phase Currents (~30A Continuous), for 24-52V Batteries (60V Max Input).  Full Product Information Page

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V6 Baserunner_Z9 Field Oriented Motor Controller, Compatible with New Superharness Kit System. Flat Profile Fits Many Downtube Battery Enclosures. Z910 Motor Plug. 55A Peak Phase Currents (~30A 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 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. 

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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. 

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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.

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

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Stainless Steel Mounting Plate for Attaching CA to Bicycle Steer Tube

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Stainless Steel Mounting Plate for Attaching CA to Bicycle Steer Tube

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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.  

If you are looking to get the kit with a pilot batch of our Air Travel friendly LiGo 10X batteries instead, don't select any battery here. Instead use the LiGo 10X battery store page to separately add the pack to your cart.

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. 

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 or Superharness. 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
Ready to Roll Kit based on Rear G310 Motor, Downtube Battery with Baserunner Controller, CA3 with PAS Options etc.
SX2 Rear with Regen Mod CA3 Kit

In stock

USD$699.00

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Actual cruising speed/perfomance under any loading conditions is well modeled in our simulator.
Launch Motor Simulator with SX2 Rear with Regen Mod CA3 Kit

Summary
  • Motor Winding Option :
    1 x SX2 Fast Wind
    SKU#: M-MSX2_FST
  • M12 Regen Kit Torque Arm:
    1 x V7 Regen Torque Arm 12mm
    SKU#: TA-TorqArm_V7_12
  • Clutch Weld:
    1 x Lock Clutch Mod
    SKU#: LBR-ClutchWeld
  • Z9 Controller:
    1 x V6 Baserunner_Z9
    SKU#: C-BRZV6
  • Baserunner Controller Mount:
    1 x Reention battery baseplate, machined to fit Baserunner
    SKU#: CP-BPReen
  • V3 Cycle Analyst:
    1 x CA3-WPx
    SKU#: CA-CA3-WPx
  • Auxiliary Input and Power Switch:
    1 x CA3_MFSwitch for CA3-WPx
    SKU#: CAP-CA3_MFSwitch
  • CA Mounting Bracket Style:
    1 x Steer Tube Mounted Bracket for Cycle Analysts
    SKU#: CAP-CA_SteerBracket

Complete conversion kit based around the Shengyi SX2 mid-sized silent geared hub motors, but modified with a welded clutch for regen capability.

  • Baserunner motor controller tucked neatly in a downtube battery, the CA3 with accessories and pedal assist systems.
  • The motor has built-in speed and temperature sensing for automatic thermal rollback with the CA3 so that there is no risk of burning up the motor on long climbs.
  • This setup includes everything configured out of the box for a lightweight commuter ebike with pedalec control.

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 Shengyi X1 / X2 Geared Motor Info Page

For details on the PAS/Torque sensor selection, see the PAS Info Page

*For installation of the SX motors with welded clutch mod, we highly recommend that you install the v7 regen torque arm on the non-cable exit side of the axle. If there are fitment problems that prevent you from doing this and you need to install the torque arm on the cable exit side of the axle, we recommend reducing your max torque to 30nm in the controller to prevent axle breakage.*