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 Post subject: 1x10 chainline
PostPosted: Tue Sep 11, 2012 10:23 pm 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2238
Location: Pedal Square
Sorry for reposting this from the road forum, didn't get an answer there, this is probably the more appropriate place for 1x10 setups.

I'm building an 1x10 bike for the dark season. Can anyone help me out with the chainline? I found a Truvativ Isoflow Singlespeed crankset, it comes with power spline BB, either of 108/113/118mm axle. Which one would give me the right chainline? BB is standard 68mm english threaded, rear dropout spacing is 130mm (cyclocross frame).

Many thanks.

Edit: crohnsy is right, power spline BB

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Last edited by HillRPete on Thu Sep 13, 2012 9:08 am, edited 1 time in total.

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 Post subject: Re: 1x10 chainline
PostPosted: Tue Sep 11, 2012 11:20 pm 
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Joined: Mon Aug 16, 2010 6:43 pm
Posts: 438
Location: Canada
Depends on the cranks offset but either 108 or 113. Also your cranks are not likely gxp. They are power spline iirc.

You'll need a power spline BB for them.

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 Post subject: Re: 1x10 chainline
PostPosted: Wed Sep 12, 2012 2:43 am 
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Joined: Thu Mar 17, 2005 3:25 am
Posts: 2206
Location: Southern Indiana USA
The 3 widths are made to line up with the rear spacing. 108 is generally or standard road spacing of 130. 113 is generally used with MtB spacing of 135 and the widest is for tandems that have 145-165 rear spacing. That said, with some setups it might work better with one size different. Measure from the center of your frame to the center of the rear cassette (between cogs 5 and 6). That is the chainline you want. The specs for the chainline of the crank should be on TruVative's site.

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 Post subject: Re: 1x10 chainline
PostPosted: Tue Sep 18, 2012 6:10 pm 
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Joined: Mon Jan 26, 2009 1:52 pm
Posts: 39
Depends on what hub you are using it with, no?

108 would put that crank at 46chainline and 113 at 48.5
so 108 would be equal to a standard double road cranks outer chainring.

all according to this thread:
http://forums.mtbr.com/drivetrain-shift ... 92660.html

An eno hub is set for 47.5 if thats what you are using. Believe its like 43 if using the fixed side / version.
If you are using a cassette hub with cog and spacer you can move it to where the chainline is straight no matter what axle lenght you have upfront (more or less).


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 Post subject: Re: 1x10 chainline
PostPosted: Wed Sep 19, 2012 7:51 pm 
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Joined: Wed Mar 28, 2012 3:16 pm
Posts: 205
Location: Utah, USA
TuscanySwe wrote:
Depends on what hub you are using it with, no?


Not really, hub type would really only be relevant for a single speed.

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 Post subject: Re: 1x10 chainline
PostPosted: Wed Sep 19, 2012 10:08 pm 
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Joined: Mon Jan 26, 2009 1:52 pm
Posts: 39
2002maniac wrote:
TuscanySwe wrote:
Depends on what hub you are using it with, no?


Not really, hub type would really only be relevant for a single speed.


How is that different from what i said ?
Edit: I guess its kinda out of the question since title says 1x"10"


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 Post subject: Re: 1x10 chainline
PostPosted: Wed Oct 31, 2012 2:24 pm 
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Formerly known as wassertreter

Joined: Tue Apr 12, 2011 8:08 am
Posts: 2238
Location: Pedal Square
For the record, I went with a Truvativ Stylo with GXP BB, and the chainline is way off on the low gears. Need to look into chainring spacers, as it seems ...

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