All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
I didn't know chainless bicycles existed, but apparently they have been around for a loooong time. They are also called "shaft-driven bicycles" because instead of using a chain, they use a drive shaft.
I hate it when the chain pops off a bike, and it's also annoying when a pant leg gets caught in the gears. I have completely ripped a pant leg in half doing that.
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All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
You can't get any cheaper than free! If you have been holding out on getting a bike because you don't have the money, then you have been waiting for no reason. It isn't hard at all to find a free bike. People give away bikes all the time, or worse, people sometimes even throw away their perfectly use-able bikes.
I live near a college, and at the beginning of every year, many college students will buy a bunch of stuff and then when the school year ends you'll find futons, TV's, chairs, bikes, and lots more of perfectly fine stuff piled in and around the dumpsters. Some students will even get a kitten or a puppy and then when the school year ends, they will abandon them. Check out this article.
Anyway, back on topic, if you want a free bike, the Internet has made it even easier to find one. These two web sites are my favorite to go to for finding free things. Even if you don't want a free bike, check them out, as you may be surprised at what some people will give away for free!
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All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
There is something called the NuVinci CVT, which can be used on bikes to provide an UNLIMITED number of gears. That's pretty amazing.
The NuVinci CVT (Continuously Variable planetary Transmission) system contains balls on the inside that, well... just watch the video, I don't think I'd be able to explain it.
When it's equipped on a bike to change the transmission you have to twist the handlebar to increase/decrease the drive.
This thing can be used on more than just bikes too. It can also be used on...
Link: Fallbrook Technologies
All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
Recumbent bikes can be expensive. For those of you with the do-it-yourself approach, check out how this guy did it. He made a cheap recumbent bike out of a woman's bike and part of a kid's bike. He made it without having to weld anything or drill any holes.
All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
The HumanCar is a human powered vehicle that is propelled without the use of pedals. It seats up to four riders that can all work together to move, and even steer, the HumanCar.
To propel the HumanCar, riders use their upper body strength to pull the bars (like you would a rowboat). To steer the riders lean left or right in the direction they want to steer.
The HumanCar was designed to be street legal, and can achieve speeds of up to 30+ mph. Downhill it has gone at speeds of over 60 mph.
Link: HumanCar
All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
Check out this bike called the SpinCycle.
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All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
This is one bike you wouldn't want to fall off of... not that any sane person would want to fall of any kind of bike, but anyway...
this bike is 10 feet tall.
All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
Monowheel cycles are something different. With your basic bicycle, riders get "on" and ride, but with a monowheel, the rider gets "in," and sits inside of one giant wheel.
While monowheel cycles are definitely something to look at, their is much to be improved in the monowheel world. In the cycle contest, the bicycle still wins over the monowheel.
Video of a Monowheel in Action
All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
I've never seen a tandem bicycle that has the riders back to back. Kind of plays a trick on the mind. Are they coming or going?
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 NEW Pacific 26" Dualie Tandem 21-Speed Bike-Green by Pacific Cycle - 264140P  US $239.95
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 PACIFIC 26" Dualie Tandem Road Bike/Bicycle 264140P US $319.99
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 VINTAGE SCHWINN BICYCLE Seat,Coppertone,Cruiser,S-7,Bike,corvette,tandem,26",rat US $9.95
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 VINTAGE SCHWINN BICYCLE Seat,Coppertone,Cruiser,S-7,Bike,corvette,tandem,26",rat US $9.95
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All pedal powered cycles are here. Bicycles, tricycles, unicycles, etc.
You could bike around on just an average bike... or you could be different and do something like below. Here are a few bikes that people got creative with. They welded roll bars on so they could do a somersault on their bike, and then keep riding.
Here's a pocketbike that has a roll bar attached to it....
Here's a bike that has two roll bars on it to make rolling easier...
Last, but not least, here's a bike that rolls over... a lot...
