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SX2 Rear Minimal Kit

Rear 250-500W Minimalist SX1 Kit, Throttle control, Downtube battery with Baserunner Z9 Controller.

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From USD$470.00

To USD$2,546.50 Regular Price USD$2,721.50

In stock

SKU
KIT-SX2_M_RTR
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Customize SX2 Rear Minimal 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.  

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.

V6 Torque Arm with Hardened Insert for Frame Mounting with Hose Clamps. Fits M12, M14 and now even M16 Axles on Front or Rear.  Also Available on Amazon for US customers

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V6 Torque Arm with Hardened Insert for Frame Mounting with Hose Clamps. Fits M12, M14 and now even M16 Axles on Front or Rear.  Also Available on Amazon for US customers

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L10 Extension Cable (60cm)

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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The Baserunner Z9 Stand Alone controller supports up to 55A peak phase currents and should be screwed to the aluminum mounting bracket for heat sinking. The battery lead is terminated with anderson powerpole connectors. 

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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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.  

The ebrake levers can be included for a motor safety cutoff whenever you squeeze the brakes. 

9 Pin Mains to Throttle and Ebrake Breakout Cable

9 pin mains to JST-SM throttle, ebrake, and DC jack cable harness, for basic ebike builds with a version v4 or later controller, without a Cycle Analyst. 60cm long.

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9 pin mains to JST-SM throttle, ebrake, and DC jack cable harness, for basic ebike builds with a version v4 or later controller, without a Cycle Analyst. 60cm long.

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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.
SX2 Rear Minimal Kit

In stock

USD$513.00

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

Summary
  • Motor Winding Option:
    1 x SX2 Fast Wind
  • Rear Torque Arm:
    1 x V6 Torque Arm
  • Motor Extension Cable:
    1 x L10 Extension Cable (60cm)
  • Z9 Controller:
    1 x V6 Baserunner_Z9
  • Baserunner Controller Mount:
    1 x Reention battery baseplate, machined to fit Baserunner
  • 9 Pin Main Cable Harness:
    1 x 9 Pin Mains to Throttle and Ebrake Breakout Cable

This is a more basic version of our SX2 CA3 kit assuming only basic throttle control is desired with no need for any kind of handlebar displays. It is based around our mid-sized silent geared hub motors, including the baserunner motor controller tucked neatly in a downtube battery. This setup includes everything configured out of the box for the ideal for a minimal, lightweight commuter ebike.

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 SX Geared Motor Info Page