Is it possible to have a 12 x 12 speed? (144 speed)
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Is it possible to have a 12 x 12 speed? (144 speed)
12 chain rings on the back and an identical 12 on the front. Is this somehow possible? Wonder how it would ride.
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I have a 30 speed now, 10 on the back, three in the front - but 144 would require two rear derailleurs to be used. sounds like an accident in the machine shop to put my feet anywhere near that much metal.
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Well, a 14-speed Rohloff IGH used with a triple crank and a 7-speed cassette will give 294 possible combinations if you are enthralled by large numbers. But, as asked above "Why"?
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SRAM dual drive, 10sp cassette and 3 to 5 chainrings. 90~150 gear combinations possible.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
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https://www.canosoarus.com/08LSRbicycle/LSR%20Bike02.htm if ya wanna go fast!
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Think of trying to pedal a bike that has 9 more chainrings between your legs. It's easy enough to buy or build a bike that has unusable/unnecessary gears at each end of the range.
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Why? Sheldon Brown's 63 speed bike.
It's an interesting project. Impractical, but fun to think about.
It's an interesting project. Impractical, but fun to think about.
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Hey, if you have to haul 1t of cargo on a bike, then 144sp could be quite desirable.
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Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
https://sanfrancisco.ibtimes.com/arti...ger-photos.htm
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My Quetzal recumbent came with 105 combinations. Triple crank, 5 speed mid drive, 7 speed cluster on the back. I converted it to a Rohloff with a single chain ring. Still have 5 cogs on the mid drive, but no means to shift them other than by hand. All but one of the mid drive cogs put the input ratio lower than that stipulated by Rohloff, so they are just there to take up space on the freewheel.
Guess you could say it is technically a 70 speed though.
Guess you could say it is technically a 70 speed though.
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I'm still a believer that properly spaced 10x2 or 7x3 gives you all the gear combinations that the vast majority of riders will ever need. Heck, I remember when 12 and 15 speeds began replacing 10 speeds (5x2) and people were wondering what you needed all those gears for. There is a point where more adding gears for the sake of having more gears will produce one or more of three results: Gears so absurdly high or low as to be unusable, multiple redundant gear ratios, or gears with steps so small as to be insignificant and of no real benefit.
#16
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A friends dad same early 60's fixed up 2_3 speeds, one had 2 sprockets,
one on the hubshell . 2 chain loops..
clever machining could run 2 CV nuVinci hubs 1 driving the other, to widen the range..
one on the hubshell . 2 chain loops..
clever machining could run 2 CV nuVinci hubs 1 driving the other, to widen the range..
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Edit: Just remembered.. do it old school. 63 speed yo. https://sheldonbrown.com/org/otb.html
Last edited by RaleighSport; 05-22-12 at 11:57 PM.
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More ratios does not mean more range. It would be interesting to see how many of the gear combinations overlap and how many are truly unique.
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Just convert to a 1/4 inch pitch chain, instead of the current 1/2 inch chain.
Then you can put 20 cogs on the back.
Sheldon Brown's Nanodrive system.
(Sheldon seems to have all the answers in this thread!)
Then you can put 20 cogs on the back.
Sheldon Brown's Nanodrive system.
(Sheldon seems to have all the answers in this thread!)
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Why?
The cross-chaining possibilities would be endless.
But, the trim mechanism might need some thought.
The cross-chaining possibilities would be endless.
But, the trim mechanism might need some thought.
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You know what would be even more interesting is a bike CVT. It's doable....
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I'm still a believer that properly spaced 10x2 or 7x3 gives you all the gear combinations that the vast majority of riders will ever need. Heck, I remember when 12 and 15 speeds began replacing 10 speeds (5x2) and people were wondering what you needed all those gears for. There is a point where more adding gears for the sake of having more gears will produce one or more of three results: Gears so absurdly high or low as to be unusable, multiple redundant gear ratios, or gears with steps so small as to be insignificant and of no real benefit.
For what it's worth, I think Schwinn's 5-speeds gave enough range for most people (39-90 GI, roughly). But the jumps between gears would be hard to sell these days.
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I'm still a believer that properly spaced 10x2 or 7x3 gives you all the gear combinations that the vast majority of riders will ever need. Heck, I remember when 12 and 15 speeds began replacing 10 speeds (5x2) and people were wondering what you needed all those gears for. There is a point where more adding gears for the sake of having more gears will produce one or more of three results: Gears so absurdly high or low as to be unusable, multiple redundant gear ratios, or gears with steps so small as to be insignificant and of no real benefit.
From a historical perspective, every time an additional cog was added, there were those who loudly proclaimed it wasn't needed, the wheels would collapse, the chains would break, durability had gone out the window, etc. until they got used to N+1 only to repeat themselves the next time it happened. I've ridden 5,6,7,8,9 and 10-speed freewheels/cassettes and double and triple cranks over the past nearly 30 years and each increase brough some advantages and very few problems. There has to be a limit but I'm not ready to say where it is.