Magnetic gears, for a bicycle. Chainless bike, dragless drivetrain

[Cloxxki]

Hi J,

Got your mail and replied.

OT: I did some thinking on your terrain donut wheels and have made a little concept in my head.

I will see if I can make a drawing.

Would you mind it if the tires were adjustable  for terrain and high speed surface on the fly?  ;-)

Retractable knobs, responding to pressure? :-) Been done.

These bikes exist BTW, it's the largest growing product ground in mountainbikes. People are loving it, and especially women appreciate the stability and float. Lacking leak power output might be a reason why they like wheels that are basically flywheels. And the fat tire increase rideability over rough terrain.

[Cherryman]

Retractable knobs, responding to pressure? :-) Been done.

These bikes exist BTW, it's the largest growing product ground in mountainbikes. People are loving it, and especially women appreciate the stability and float. Lacking leak power output might be a reason why they like wheels that are basically flywheels. And the fat tire increase ride ability over rough terrain.

I came to post a sketch, see i got beated already!  Well, i had an idea among that line, .. anyway I will post it .

;-)

Indeed I visioned tires responding to pressure / centrifugal force.  In the picture you see three stages.
One has a pneumatic connection to the frame (which of course doublefunction as pressure tank   This could also be a spring, or a cable.
The magnet connection makes the wheel actually hang loose,  the magnets are in attracting mode , so the wheel sticks to the drive wheel.  The the magnets provide the connection, the air and rubber the smoothness. Dirt and dust can easaly go between it, the wheel can freely pivot a little as well. 

You might need two of those drive wheels i think (not drawn).

[neptune]

@Cloxxki . As a bike designer you have probably forgotten more about bikes than I will ever know . I like to add my views on various subjects . My views are often controversial , but at least they are logical most of the time . Often , my aim is to stimulate discussion . At 66 years old I dont do a lot of radical offroad stuff , but I ride at least 10 miles a day on the road . Mountain bikes are fine off road , but they are hard work on the road . But at least these "fashion victims" get some extra exercise . Somewhere I have seen magnetic drives on the internet that actually claim overunity . See Peter Lindemanns book . Now that WOULD Be worth the cost and the weight .

[Fester]

How about a Tesla style bike? Turbine "pump" at the pedals, and turbine at the back wheel. And it would make a sound that would either make people ask questions or toss colorful words your way

[Cloxxki]

@Cloxxki . As a bike designer you have probably forgotten more about bikes than I will ever know . I like to add my views on various subjects . My views are often controversial , but at least they are logical most of the time . Often , my aim is to stimulate discussion . At 66 years old I dont do a lot of radical offroad stuff , but I ride at least 10 miles a day on the road . Mountain bikes are fine off road , but they are hard work on the road . But at least these "fashion victims" get some extra exercise . Somewhere I have seen magnetic drives on the internet that actually claim overunity . See Peter Lindemanns book . Now that WOULD Be worth the cost and the weight .

My conceptual designing stemmed mostly from obsession of specific details, my knowledge is limited to what I was interested in.
Good for you to keep your riding up that way, I'm making fewer right now.


My experience with mountainbikes is almost contrary to yours, perhaps due to my extra-tall body style. Only at insane road speeds I've found a skinny 23mm tire road bike to outperform a 60mm road slick tire mountainbike (on 700c/28"wheels). And the fat wheels outperform the road bike in any deciding moment: cross railtracks, cutting corners, emergency stops, overlooked potpholes, etc.
Also, I subscribe to the belief that bike wheels should be bigger, for a long list of reasons, all tieing in with performance as well. It's not here today, but larger bike wheel are a-coming. If you want it badly enough, a 36" wheeled bike can be gotten, with hellaheavy (moped quality) grooved road slicks, amongst others. Those will ride up staircases, litterally, and won't be impressed by any cobblestone road. Lighter tires are on the way. I am currently (modestly) promoting an in-between wheel size with with a typical MTB tire would come to 32", where 26.5" and 29" are currently the norm, and 36" the freak exception.


I am a bit of a bike nut. I regard road handlebars as uncomfortable in any of the many hand positions, and the same for broomstick shaped MTB bars. The optimum IMO is somwhere halfway, grip angledd outward and back, as "comfort" bikes. It doesn't mean "slow" in any way, just comfort.