Click on your bike below to start your conversion today!


Frankenstein Trikes is committed to offering Trike rear-ends and Trike Conversion Kits with the highest quality, low maintenance and that are easy to install. Our mission is to ensure quality driven design, manufacturing & production.

Our product specialist can assist you in purchasing the exact Trike Conversion Kit you need. Extensive customer support is also available during the installation process. Once you purchase our Kit you are a member for life, we welcome feedback and suggestions throughout your ownership. Our Trike Conversion Kits are complete down to the last nut and bolt. We have worked very hard locating superior Amercian Made components at the best price, and forwarding the savings on to you.

You can purchase a complete Trike kit designed specifically for your motorcycle or order individual components required to fabricate your own Custom Trike. You can place your order with us, or thru one of our dealers. We need year, make and model of your motorcycle, and require payment in full at the time of order.

Orders are usually shipped within 5 days. We ship using insured domestic ground delivery to your business or home. For easy handling, most of our Trike kits are packaged in 5 separate boxes. We use expandable foam in our packaging to avoid damage during shipping. You will be provided with tracking numbers via phone or email upon shipment.

Our Trike Kits are designed to be a simple bolt-on installation. If you are not comfortable installing your Trike kit, you can have it installed at any one of our dealers.

All Frankenstein Trike rear ends and Trike kits have a one year unlimited miles warranty on materials and workmanship from date of purchase. Warranty is limited to repair or replacement of parts, not labor or paint. This warranty does not cover parts that fail as a result of improper installation, misuse, abuse or the failure of another part. Parts installed for use on off road vehicles, racing or competition use have no warranty. Parts modified for use or installed for use other than their original design and application have no warranty.

SWING ARM CORE CHARGE(When applicable)
Unusable, damaged or compromised swing arms will not be accepted and will not be eligible for core refund. Damaged swing arms will not be returned to customer unless requested. Customer will be responsible for shipping charges for damaged swing arm return. Package your swing arm with care. Swing arms damaged during shipping will not be accepted. Customer is responsible for shipping claims.

The names and model designations Harley-Davidson , Harley, H-D, Sportster, Dyna, FXR, Softail, Fat Boy, Heritage, Roadking, Electra Glide, FLT, FLH, FX, FL, XL and V-ROD are owned by Harley-Davidsons and its affiliated companies. These trade marks are used in this catalog for reference only. Frankenstein Trikes is in no way associated with Harley-Davidson Motor Co.

Frankenstein Unlimited owns the following trademarks: Frankenstein Trikes, Create Your Own Monster, Sport Trike Kit, Sport Trike Rear End, Hot Rod Trike Kit, Hot Rod Trike Rear End, Hot Rod Trikes and Power Steer.

All photos on this website, copyright 2010 Frankensteintrikes.com unauthorized use is prohibited.






Frank Pedersen and Steinar Bergby " Frank and Stein " decided the world needed one more choice in Trike rear ends,
So they designed what may be the best looking, strongest, narrowest and lightest Trike rear end on the market, using only the best parts and materials, and made right here in the USA. All this, and it's one of the lowest priced of the Trike rear ends available.
Our narrowest Trike Rear end is made from 6061 T6 Billet Aluminum, has Dana differential, 9" Ford Street / Strip axles, bolt pattern is 5 on 4 1/2" (Ford car), weighs 88 pounds and is 30" wide, Machined finish with 4 piston billet caliper and stainless steel rotor $ 3500.-  Color Anodizing available for an additional $440.- per Rear end. Call us for pricing and availability on Swing arms and Fender brackets. Our Trike rear end has a Dana 30 open differential,  there must be a differential in any rear end used on the street to allow the outside wheel to turn faster when cornering. It pulls on both tires all the time unless you have one wheel on sand or a slick surface, then that tire would spin. It  isn't a positrac or limited slip, a positrac or limited slip has clutches inside the differential to limit wheel spin on one wheel, these are designed for the weight of a car and does not work well on a trike, it would have a tendency to push the trike straight in corners.
We had a 140 HP 145 ft.lbs. of torque 127 cu. in. engine in the Frankenstein trike, it would smoke both tires or if it hooked up, wheelie.
Since it does not have a driveshaft it has no tendencies to lift the right rear tire and spin it like a car without a positrac or limited slip differential.
FOR MORE INFO, CALL US,  Ph: 913-352-6788 or E- mail us at mcworx@ckt.netFOR TRIKE KITS, CLICK HERE!Add $440.-  for anodized Rear End.EXTRA WIDE CENTER, 34" wide for installation on 250 tire bikes.NEW! 38" wide Rear End for stock Harleys.
Trike Swingarm for Harley Softail '87-'99 and 2000up,raw Powder coated black, add
Below, Swingarm and Rear end mounted in '87-'99 Softail frame.Mounting plates for Trike rear end 3/8" thick. $

Frankenstein Trikes, Trike rear end axle Kit, Trike kits, Trike Conversion Installation for Harley, XL, Sportster, Dyna, Dynaglide, Dyna Glide Superglide, Super Glide,  FXR, FLT, Electra Glide, Street Glide, Road Glide,  Touring, Softail, Wide Glide, Heritage, Fat Boy, Night Train, Buell, Yamaha, Roadstar, Warrior, Raider, Victory, Honda, Suzuki, Kawasaki,  Complete kits with Swing arm, Wheels, Fenders or Body. Prices start at $3200.00 for Trike rear end only. Complete Trike Kits start at $4900.00 Tryke, Trykes, Rear ends are made of Billet aluminum, aluminium, and has Ford 9 inch Street Strip axles. It has a Dana 30 Diff and is Strong enough for the Bonneville Salt Flats and Drag Strip Race, Racing.
We sell Trike Kits and Trike Rear ends all over the world, including: New Jersey, District of Columbia, Connecticut, Manitoba, Alabama, Washington, Maine, Idaho, California, Texas, New York, Pennsylvania, Ohio, Illinois, Minnesota, Indiana, Louisiana, Mississippi, Georgia, Michigan, Florida, Maryland, Bahamas, Barbados, British Columbia, Wisconsin, North Carolina, Kentucky, Virginia, Ontario, Maryland, Delaware, Colorado, West Virginia, Florida, Wyoming, Nebraska, California, Missouri, Kansas, Iowa, Massachusetts, Rhode Island, Alberta, Oklahoma, Montana, Quebec, Arkansas, Arizona, Oregon, New Mexico, New Brunswick, South Dakota, Nevada, Guam, North Dakota, Utah, Vermont, South Carolina, Alaska, Canada, Mexico, Norge, Norway, Sverige, Sweden, Danmark, Denmark, Finland, Soumi, Germany, Deutchland, Netherlands, Holland, Belgium, France, Italy, Spain, Luxemburg, Portugal, South Africa, Japan, Nippon, New Zealand, Australia, Israel, England, United Kingdom, Ireland, Scotland, Island, Iceland, EU, Europa, Europe, USA, South America, Brazil, Miami, Orlando, Daytona, Atlanta, Myrtle beach, Phoenix, Las Vegas, Los Angeles, San Francisco, Salt Lake City, Dallas, Minneapolis, Sturgis, We do not sell: DFT Trikes, Lehman Trikes, Mystery Trikes, California Sidecar, Champion Trikes, Trike Shop, Santiago Choppers, V G,

Since 3/13/08

Hit Counter