Yes, the 2x4-X is a bit heavy, but so are my off-road handcycles and wheelchairs with power assist add-ons.

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I made this prototype primarily with free wood from the scrap bin at Home Depot. 

 

• The 8" trike wheel is from Harbor Freight ($16).

• Instead of metal collars, I am using cheap hose clamps for the 1/2" through axle.

• The leg supports use 1x4s.

• The seat and sideguards are 1/4" plywood.

• Notice the "floating" seat design using a cut up foam block for "suspension". This method is used for lessening impact on martial arts floors for falls.

• The backrest cushion is foam padding covered with black gorilla tape as a cover.

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The 2x4-X is very cheap and easy to build. Perfect for learning about wheelchairs in terms of design and functionality.

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