Free Bamboo Bicycle Trailer Plans
Carry Freedom developed a bicycle trailer that would be suitable for building in the 3rd world. The design is very simple, very adaptable, and very easy to copy. Its structure also has one of the best strength to weight ratios of any bicycle carrying product, for a given material. And holy crap it’s made of bamboo! Click here for their free plans.

Worldbike’s free plans for the Extrabike
The Extrabike (similar to the Xtracycle) is an efficient, practical, low-cost solution for people requiring a method of transporting cargo or passengers on a daily basis. Requiring only an existing bicycle and commonly available tools for installation, the Extrabike adapts any typical bicycle to a configuration better suited for hauling purposes. The advantages the Extrabike has over standard rear racks in terms of hauling are a lower positioning of the weight for greater stability and the extension of the wheelbase to avoid interference of the load with the rider’s pedal stroke.
Designed in South Africa by one of Worldbike’s founders, Ross Evans, in 1999, the Extrabike addresses both the practical issues of hauling goods via bicycle as well as the issue of affordability.
By extending the length of the frame and providing sturdy, load-bearing racks to either side of the rear wheel, the Extrabike allows the rider to comfortably carry up to 200 pounds of load. These racks, which can be raised or lowered, provide ample room for quickly and easily loading large or bulky cargo.
Technical drawings available here.

Big Boda load-carrying bicycle
Designed with weight, strength and cost in mind, the Big Boda bicycle extension transforms a standard bike into a two-wheeled hauler for carrying passengers or loads with more ease and greater efficiency.
Based off of the Longtail design that was produced in partnership with Kickstart International in 2003, the Big Boda is made to fit the most common, lowest-cost bicycle available in the developing world– the “Black Mamba”. Similar to the Extrabike in concept but with an aim to reduce weight and cost, it adds long rear and side racks at the back of the frame, inserted between the seat post and the rear wheel. The rear wheel is pushed back, extending the wheel base and providing additional room for securing cargo above and to the sides without interfering with rider position or pedal stroke. In this configuration, large loads that would normally require great skill and effort to transport in a single go become quite manageable for a typical rider. Weight and cost are reduced by using less expensive steel stock and by simplifying the side racks, eliminating the wide, drop down platforms seen on the Extrabike.
Big Boda Sketchup drawing available here.

Chop ‘N Drop Worldbike
Chop ‘N Drop Worldbike is a home-made version of our flagship Worldbike design. It’s made by chopping a basic mountain bike frame behind the seat tube, extending it, adding cargo racks, baskets, bags, or lashing points, and repainting as a new complete Worldbike. A quick explanation of Chop ‘N Drop. The name comes from the world of bicycle and motorcycle choppers, which are often made by cutting and stretching a stock frame, changing a key frame angle, or adding length to the fork. Making a Worldbike is very similar to making chopper, and it can be even more fun when you know that your hard work is contributing to a great cause. Making a Chop ‘N Drop Worldbike is a great way for engineering students, garage mechanics, bike industry designers, and others to take part in the open-source process of improving the available bicycles in the developing world.
View how to Chop N’ Drop here.
…and how to make a cargo rack here.

Wooden Motorcycles
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