Auto Shifter on eBay

Sure is silly to me.I know some are stymied by a 24 speed, but a 3 speed is all but "auto" already.I guess if you want to spend some money and add some weight it's useful.
 
If you have to manually shift its not automatic. Here in the USA many state's laws require an automatic transmission system. These laws even go as far as to say no manual clutching or manual shifting of engine driven gears by the operator. They say nothing about a fully automatic transmission system which shifts gears. Currently this is a legal loophole due to the way the laws are worded.
 
My concern would be that it doesn't index the positions of the gears so you might have problems with it jumping back and forth between gears at certain speeds. definitely not a precision solution and one that might kill your Nexus 3 gearhub.
 
If you have to manually shift its not automatic. Here in the USA many state's laws require an automatic transmission system. These laws even go as far as to say no manual clutching or manual shifting of engine driven gears by the operator. They say nothing about a fully automatic transmission system which shifts gears. Currently this is a legal loophole due to the way the laws are worded.
I'm just talking about a regular pedal bike, not a motored one.When I get to hills, I downshift and have my cadence meet the terrain, motor or not.If it's all done by a motor you have a "moped" not a motor assisted bicycle IMO.Lewiebike has a good point as well, I'm thinking the old Sturmey Archers, but if you didn't have them adjusted perfect on occasion they would go into netural AKA freewheel both directions, if you were standing and cranked you'd have to have superior balance not to fall off because of lack of pedal resistance.Lewiebike,... Coos Bay, very nice, I've spent time in Port Orford and there's nothing like mountains meet the sea, and sideways rain.
 
Here in the USA some of our states define a moped and a motorized bicycle as the same thing. Others don't want any self built motorized bicycles on their roads at all. The laws vary greatly from state to state. Some allow what you're talking about motor assisted by means of electric motors but don't allow motorized bicycled which are powered by a combustion engine.

Of the states which allow combustion engines most want them to be under 50 cc. Large riders in mountainous regions are going to have to have gears. Unfortunately many of these states want an automatic transmission system. They even go as far to say no manual clutching or manual shifting of engine driven gears. The auto shifting is currently providing a legal loophole around this.
 
My concern would be that it doesn't index the positions of the gears so you might have problems with it jumping back and forth between gears at certain speeds. definitely not a precision solution and one that might kill your Nexus 3 gearhub.

I have a 5 speed automatic bike. Been riding it for more than 4 years now. I use a LandRider. Made a custom freewheel (34,28,24,20,16). By widening the range between the gears it smooth out the shifting and improved the acceleration. I also turn the cadence adjustment screw on the derailler to the max along with some other modifications. LandRider warns you with a sticker on their bike not to leave the saddle and stand on the pedals. There's already a good range between the gears on a 3 speed IGH (75%,100%,133%). I've figured out a way to modify a LandRider derailleur so it could shift an IGH. It would work a lot like the Kildoff shifter. By adjusting the cadence adjustment screw you could control what speed the hub shifts at.

In the beginning I was told there was no way what I wanted to build could work. None of what I was told would happen was true. One never really knows about the unknown until they begin to explore.

http://youtu.be/pGDGIIdn--s
 
Here in the USA some of our states define a moped and a motorized bicycle as the same thing. Others don't want any self built motorized bicycles on their roads at all. The laws vary greatly from state to state. Some allow what you're talking about motor assisted by means of electric motors but don't allow motorized bicycled which are powered by a combustion engine.

Of the states which allow combustion engines most want them to be under 50 cc. Large riders in mountainous regions are going to have to have gears. Unfortunately many of these states want an automatic transmission system. They even go as far to say no manual clutching or manual shifting of engine driven gears. The auto shifting is currently providing a legal loophole around this.
All I was saying is, an auto shift on a pedal bike (without motor) is silly, intergrated with a motor is what you're talking about.From what I've read all the frictions and golden eagles are "motor assisted bikes" IC engines, not a moped.This whole site is about motor assisted bikes, most of which are IC, and that's what I was talking about.If you only pedal to start the thing it's a moped.
Also laws don't "vary greatly" they differ a bit.For the most part under 50cc.A proper geared friction or goldeneagle will do all the hills and heavy humans with one ratio, but you must "assist", that should be easy to understand.
 
I've been on several forums for quite some time now. Many of my post have been in the legal section. If a person can't post the statute numbers and exactly what the law says then they don't fully know or understand what the law is. And yes there is a big difference between what some states allow and others don't.

This forum is also about several kinds of builds as well. We have builders here whose bikes aren't ever ment to be ridden on the public roadways. Some are off roaders others are used on race tracks. Many of us here have built engine driven multi geared bikes. Because we know single ratios on 50cc and under engines will not pull heavy loads up extremely steep hills. Embrace technology don't be stuck in traditions. There are those of us who are up in our years and/or have health issues. Therefore we can give only a small amount of assistance. The mind must take over when the body fails. We may not go up an extremely steep hill very fast with a heavy load but we do get up them. My good buddy Fabian uses larger engines with engine driven multi geared bikes to pull monster loads up the side of mountains. So you see we have all kinds of builds here.
 
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