Pedal extensions for one-legged bikers I have tried the classical plastic pedal extensions as in the picture. I have tried riding with one foot, but it was a little bit hard pulling up. I was wondering if anyone knows of an extension for a one-off legged person riding a bike. I thought the following would work:



Any ideas?

Also, there would have to be a mechanism for ensuring the biker did not have a bad fall in case the bike became unbalanced and the biker fell on the side the biker had no leg. How would you prevent this? Would you just attach small-child-like accessory wheels on only one side as follows?



Maybe the back supporting wheels might be enough, otherwise the biker could not turn the front wheel.

Maybe some sort of mechanical spring plus other components would be needed attached to the front supporting wheel, sort of as follows, although the picture is not a good one:



How would you do it?

Does something like that exist?

Thanks.
There are many ways to approach this problem.  The WORST thing you can do is not involve the rider in the decision making process.

If the rider is comfortable riding, perhaps all you need is a regular bike with a toe clip (as pictured) or a clipless MTB shoe with a cleat underneat, and a matching pedal.   SPD would be the most commonly known style.

There's no need to remove the other-side crank although that is a good theft deterrent.  In fact it may help to add a little weight to the empty pedal.

A little wheel on the off side is likely to hook on things or cause more problems than it solves.

More spendy options exist too - 

Tricycle  Solving the balance problem by adding a big third wheel instead of little kids one.



Handcycle  These are powered totally by the rider's arms, not by the feet (foot)  This one is probably a tricycle, but the theory works the same for a 2 wheeled bike.



Here's a handcycle built onto a wheelchair - its possible to remove the front part and return it to normal wheelchair mode.



Prosthetic Depending on how much of the leg is missing, its possible to have a strapon leg that rides like normal.  Above-knee amputee's comments or this guy who rode the Haute Route with one leg and one arm