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Old 04-14-09, 08:22 AM   #1
gdlerner
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Singlenator on Bike Friday NWT with Rohloff

Hi
thanks to Vik for the tips,I also change the rohloff extentions to a singlenator and is much better
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Old 04-14-09, 09:08 AM   #2
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What do you like better about the Singlenator? I've got a Rohloff tensioner on my Surly Big Dummy and like it quite a lot - very well made.

Generally speaking I wouldn't use a single pulley tensioner like the Singlenator in push down mode as it doesn't give you as much chain wrap on the rear cog. This will result in slipping when you start to wear the drivetrain. The Rohloff double pulley tensioner is much better in this regard.

If you use the Singlenator in push up mode you get lots of chain wrap just like the Rohloff tensioner and a much lower profile drivetrain. However, you need to loosen the tensioner to get the rear wheel off.
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Old 04-14-09, 10:08 AM   #3
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vik its not possible to put it like you have it in your bike the ares no space,zjats the reason is in my bike diferent,I just put it today and no trying to much just the way home from the bike shop and is working perfect and I have more space to the ground the only thing is I need to take the chain out for foliding but I onlyfold the bike for travelling so no problem,anyway
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Old 04-14-09, 10:29 AM   #4
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vik its not possible to put it like you have it in your bike the ares no space,zjats the reason is in my bike diferent,I just put it today and no trying to much just the way home from the bike shop and is working perfect and I have more space to the ground the only thing is I need to take the chain out for foliding but I onlyfold the bike for travelling so no problem,anyway
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The Singlenator will work fine in the push down mode until the drivetrain gets worn and you put some decent torque on the pedals - like climbing a hill - then it will slip. At that point you just need to replace the chain & rear cog to get back to new performance. With the Rohloff tensioner you'll be able to run the drivetrain components much longer before needing to replace them.
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Old 04-14-09, 10:49 AM   #5
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vik I think I don t understand,you also have it on your Bike Friday,and remember I asked to you?so how long you think will last how many km,with the rohloff tensioner I need to change the chainand the sprocket wheel every 3500km
It s not posible (the singlenator)to put it like in your bike the ares not place it s touching the frame,thas the reason I put it the other way
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Old 04-14-09, 11:28 AM   #6
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vik I think I don t understand,you also have it on your Bike Friday,and remember I asked to you?so how long you think will last how many km,with the rohloff tensioner I need to change the chainand the sprocket wheel every 3500km
It s not posible (the singlenator)to put it like in your bike the ares not place it s touching the frame,thas the reason I put it the other way
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Look at the photo of my NWT above...in particular look at how many teeth on the rear cog the chain is wrapped around. Now look at your Tikit with the Singlenator pushing down and look at how many teeth the chain wraps around - quite a few less.

It's not life or death...if you are happy and it's working just ride your bike. I'm just geeking out here....

BTW - I jealous of your NWT - love the Rohloff...
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Old 04-14-09, 11:48 AM   #7
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vik Its not a Tikit it s NWT,yes I will look how many km I ride like this anyway I already order another for my wife bike NWT
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Old 04-14-09, 12:10 PM   #8
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GD,

I think I agree with Vik, in that the advantage (for aesthetic and higher chain line) comes when you run it in "push up" mode. Are you saying that it won't do that on your bike? It looks like both you and Vik have NWTs (which is what I am looking at getting, hence my interest!).
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Old 04-14-09, 12:35 PM   #9
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PhilipDaniels we have the same bike the differents is that I have a Rohloff gears with a 13 thooths sprocket thats the reson is not possible to puti on the "push up mode no space and is touching the frame,my bike shop did it for me and they have a lot experience
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Old 04-14-09, 04:54 PM   #10
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hmm, It does seem like gdlerner has less space to run his tensioner in push up mode.... I wonder why this is? optical illusion? or a difference in the Rohloff dropouts (OEM)? Perhaps it is just an older model NWT with some differences in geometry? does the singleatorcome in more than one size/lenght?
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Old 04-15-09, 07:54 AM   #11
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hmm, It does seem like gdlerner has less space to run his tensioner in push up mode.... I wonder why this is? optical illusion? or a difference in the Rohloff dropouts (OEM)? Perhaps it is just an older model NWT with some differences in geometry? does the singleatorcome in more than one size/lenght?
The stock rear cog on the Rohloff is a 16T....the rear cog on my Nexus is a 23T...even going to a 21T cog on my Nexus the Singlenator would not work in push up mode. I just ran into this problem and ended up going to a slightly bigger chain ring so I could use the 23T cog and keep the singlenator in the push up mode.
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Old 04-15-09, 07:19 PM   #12
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hmm, maybe this is a solution for gdlerner as well?
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Old 04-16-09, 05:09 AM   #13
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No, a 23t cog on a Rohloff would screw up the gear ratio. Although maybe this could be fixed by choosing an appropriate chainring? Don't know if it's possible to fit a 23t cog to a Rohloff though.
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Old 04-16-09, 02:28 PM   #14
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Hey guy I am happy whit what I gott and time will tell...
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