What about this!
http://www.oneupcomponents.com/
Works on 10 speed 1by systems by droping the 17t sprocket.
Any thoughts?
Like XX1 but not the cost?
Moderators: StephF, Tullio, Moderators
Re: Like XX1 but not the cost?
It's interesting Simon.
Looks like it shifts the standard “10-speed-built-for-2-chainrings” cassette up one cog to this new 42 tooth, to make cycling up hills easier on just one chainring.
A low cost way to get the same wide gear range of a 11x1.
And then sell your front mech and shifter, to bring the total cost of converting to 10x1 down to just £20!
Here’s a gear calculator if anyone is thinking about trying it: http://sheldonbrown.com/gears/
Looks like it shifts the standard “10-speed-built-for-2-chainrings” cassette up one cog to this new 42 tooth, to make cycling up hills easier on just one chainring.
A low cost way to get the same wide gear range of a 11x1.
And then sell your front mech and shifter, to bring the total cost of converting to 10x1 down to just £20!
Here’s a gear calculator if anyone is thinking about trying it: http://sheldonbrown.com/gears/
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anotherpaul
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Re: Like XX1 but not the cost?
… Or you could just try getting fitter, and then you wouldn't need to use a cassette the size of a dinner plate!! 
Re: Like XX1 but not the cost?
Paul,Paul,Paul.... The problem with "1 by" systems is the high gear not the low gear!
Fitness always helps whatever gearing sysem you have but on "1 by" gears a dinner plate rear sprocket enables a 36 or in your case a 40 front ring, that with the 11 on the back gives more speed down hill
Fitness always helps whatever gearing sysem you have but on "1 by" gears a dinner plate rear sprocket enables a 36 or in your case a 40 front ring, that with the 11 on the back gives more speed down hill