Robert Q. Riley Enterprises: Product Design & Development

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Urba Trike on mountain road

Urba Trik with body off of chassis, shows simple construction

Urba Trike parked in front of builiding

Urba Trike exploded rendering


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Plans Include...

 10 - 17 x 22 inch

 22-page book

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A Zero Emissions Electric Fun Machine

Colllage of Urba Trike shows body off chassis and climbing a mountain road.

UrbaTrike was years ahead of its time when
Mechanix Illustrated Magazine featured it on the cover.

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- $70

How to order Urba Trike plansAgreed - we need a fun and efficient electric vehicle for local trips.  But what does that mean in the real world and to your pocketbook?  For summers and year-around Southwestern US climates, UrbaTrike got it right early on.  It's sleek styling and open-air motorcycle feel make it ideal for trips to work and quick runs to the store, or just pleasure-cruising on weekends.  And with its simple frame and motorcycle front end, there's not much building to do.  UrbaTrike's minimalist approach translates into nearly free local transportation, and it's loads of fun to build and to drive.

       UrbaTrike was conceived as a way to put fun and pleasure into the prospect of saving energy and reducing emissions. It's an electric open-bodied trike with seating for two and a range of up to 50 miles on its original 48-volt battery pack. By using today's batteries and controllers, performance can be put on steroids and range can be doubled or even tripled.

         If you never driven a trike, it's something like a cross between a motorcycle and a wind-in-the-teeth fold-down-windshield sports car. And with UrbaTrike, performance can be tailored to fit your excitement threshold. The prototype shown here is equipped with a modest 48-volt battery pack comprised of eight 6-volt golf car batteries. With this setup, UrbaTrike accelerates from 0 to 35 mph in 9.5 seconds and has a maximum speed of 55 mph - not really wind-in-the-teeth sports car performance.  But a 96-volt battery pack (switching to 12-volt batteries, for example) will push top speed to 75-80 mph and double the acceleration rate.  Adding additional batteries will give it even more punch.  Performance depends on the electrical charge the batteries put behind the motor.

         The live rear axle can come from just about any rear-wheel-drive car, but ours was from an old Toyota. Virtually any automotive live rear axle will work for UrbaTrike's electric drive.   But if you can afford the extra expense, a fully independent rear suspenion can be substituted.  The important factor is to keep the track about the same - 54 inches (1370mm).  With a wider track, you'd simply extend the fenders to cover the wheels.  If you have to deviate from a 54-inch (1370mm) track, go wider, not narrower.  The fork is from a Honda 750, but a fork from any large motorcycle will work. The simple frame is made of welded steel tubing and the body is made of FRP/foam composite.  Cllick on the prior link to see how it's done.  You can see the simplicity of the design in the exploded rendering in the left margin.  The frame can be built in a couple of weekends. Figure about 150 hours to build the fiberglass body.  As you can see in the photos, there's not much surface area to finish. Plans give complete dimensions and assembly details.  Click on the image of the rendering in the left margin to see an exploded view of how UrbaTrike goes together.

     UrbaTrike plans come with recommendations and sources for modern batteries, motors, and controllers. 

Width: 64 inches
Height: 42-1/2 inches
Track: 54 inches
Wheelbase: 82 inches
Battery Pack: 48 Volt (or as desired)
Motor: Originally a Jack & Heinz #G-23-4BT aircraft generator.  Today, an Advanced DC Motors or Warp series-wound motor.  Match the motor rating to the voltage of your battery pack.
Controller: Originally Voltage Stepping.  At higher pack voltages & for smooth, efficient speed control, use a Chopper Controller.
Range: Originally, 50 miles (48-V lead-acid)   More than 100 miles with modern Lithium batteries.
Front Suspension: Honda 750 motorcycle fork
Rear Suspension: '67-'70 Toyota Corona,  RT-43 series, or as desired.  Uses an automotive live rear axle.
Top Speed: Originally 55 mph.  With greater pack voltage,  up to 80 mph.
: 2 in tandem
Body Construction: Fiberglass over foam composite



To Order Plans

  • Mail: Use the online Order Form to automatically calculate shipping charges and provide a total amount. Click on the "Order UrbaTrike Plans" link above, then press "Add Item to Cart." Fill in your shipping information. You cannot proceed to the Confirmation Page (for freight calculations) without making entries in the credit card fields. If you prefer to enter your credit card information later, simply enter a series of spaces in the Credit card fields then press "Proceed to Confirmation." Print the Confirmation Page and enter any missing information.  Mail your confirmation page to us, along with your check, money order, or credit card information. (Outside the U.S., please make payment in U.S. funds using a credit card or International Money Order.)

  • Order by Phone: Weekdays 8:00 am to 6:00 pm MST: 480-685-3225.

                    Shipments to U.S. destinations go by First Class or Priority Mail (depending on weight).
                    Shipments to destinations outside the U.S. go by mail: "Airmail, Letter-Post."
                    Arizona residents, add 10.2% sales tax.

Robert Q. Riley Enterprises, LLC.
P.O. Box 14465
Phoenix, AZ 85063-4465
Phone:  480-685-3225


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