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Singlespeed & Fixed Gear "I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)

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Old 08-14-06, 06:56 AM   #1
Ziemas
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Chainline Question- 120mm Hubs in 130mm Dropouts

I'm building my first fixie and have a question about chainline. I have a set of Campy high flange track hubs which I will change the axel on to fit in a frame with 130mm spacing. How will this effect the chainline assuming the wheel is properly dished? Is there anything I should look out for to avoid problems? Thanks.

(BTW, the Campy hubs were the only ones I could find here in Latvia, and I'm unable to locate a proper track or older frame with 126mm or 120mm spacing in my size, so I must go with what's on hand.)
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Old 08-14-06, 09:23 AM   #2
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it won't affect the chainline as long as you put 5mm of spacers on each side. Are you able to add spacers onto the axle of your hub? If not you can usually buy a longer axle that you can.
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Old 08-14-06, 09:44 AM   #3
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Chainline is measured from the center out. If the hub is evenly spaced between the dropouts then the chain line will not change.
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Old 08-14-06, 09:46 AM   #4
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Quote:
Originally Posted by Learn_not2burn
it won't affect the chainline as long as you put 5mm of spacers on each side. Are you able to add spacers onto the axle of your hub? If not you can usually buy a longer axle that you can.
I'm swapping out the axel for a longer one, that's no problem. But my concern is the chainline in relation the the chainstay. Will the chainstay leave the BB at too wide an angle and screw everything up?
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Old 08-14-06, 11:12 AM   #5
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Originally Posted by Ziemas
I'm swapping out the axel for a longer one, that's no problem. But my concern is the chainline in relation the the chainstay. Will the chainstay leave the BB at too wide an angle and screw everything up?
With chainline you are concerned with the relation between the cog and the chainring. As long as the wheel is centered, then that relation should not change.
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Old 08-14-06, 11:58 AM   #6
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Yup, chainline is measured from the center of the frame in the w direction. Meaning, if you keep the hub centered it's not moving it left or right, so it will stay perfect.
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