|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
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
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!
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.
Copyright 2011 Shumaker
Technologies, All rights reserved.