Welcome to Shumaker Technologies. We make high-end electric drive systems for bicycles and trikes. Our systems are unique. We use motors and controllers originally designed for the RC (radio control) market. These components are extremely compact and efficient. They have tremendous power density, unrivalled in the industry.

We also sell many quality brands of bicycles and components. We can set you up with a standard conversion kit for you bike, design a custom system for unique applications, and even build complete bikes, ready to charge and ride. We also design proprietary OEM drive systems for bicycle manufacturers.

 

Complete Vehicles

KMX Typhoon trike
This is my flagship project vehicle. It started life as a KMX Typhoon trike. The frame was cut apart and lengthened 3 inches, widened 5 inches, and lowered 3/4 inch. Then it was braced in a trellis fashion similar to a Ducati space-frame. The seat framework was integrated into the space-frame as a structural member. Then the frame was powder-coated "Safety Yellow" and clear coated.

The rims are custom made aluminum items made for me by Jetset in Tiawan. The front rims are 43mm wide and the rear is 47mm wide. They are also powder-coated yellow to match the frame. The front wheels are laced with extra strong 13 gauge spokes to tolerate the high side loads of hard cornering. The steering tillers (handlebars) are custom CNC machined aluminum units with custom hand controls. Both front brakes are controlled on the left handlebar by way of twin master cylinder/brake levers on one bar. The left front brake is controlled by the middle finger and the right front brake is controlled by the index finger. This independent braking allows for incredible cornering control. Steering is softened by way of a motorcycle steering damper mounted on the left side of the trike. This stabilizes the trike at high speed and is easily adjustable on the fly. The drive system is my DaVinci drive with a 3220 motor. This produces 9,000 watts of tire smoking power and accelerates the 95 pound vehicle from 0 to 40mph in 4.5 seconds (data logger confirmed). It has a 48 volt lithium polymer 25 amp hour battery pack. This pack is good for 35 miles on a charge if run an average of 20mph. Efficiency is an incredible 18 watt-hours per mile at 20mph!

More pictures: Frame1   Frame2   Frame3   Frame4   Trike1   Trike2   Trike3   Trike4

This trike was built as my flagship R&D vehicle. It is fully developed and refined. At this point, as with the majority of my projects, is for sale. Price for this trike is $8,000 plus shipping.

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