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IRO crank and Bottom Bracket width

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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)

IRO crank and Bottom Bracket width

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Old 10-11-06 | 05:37 PM
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IRO crank and Bottom Bracket width

On the IRO website, it has the cranks shown with the chainring attached on the inside on the arms. It also recommands using a 110 mm BB to achieve a 42 mm chainline. If I were to get the 107mm bb, would I be able to mount the chainring on the outside of the arms? (if it matters, the wheels i have are IRO/areohead, 120 spaced) Thanks

-§teve
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Old 10-11-06 | 05:39 PM
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I just have to ask...why do you sign the s in "steve" with such a wierd character?
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Old 10-11-06 | 05:39 PM
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wait wait are you trying to use road cranks on a track bike?!
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Old 10-11-06 | 09:11 PM
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sugino makes a 103 so you can run the ring on the outside of their rd cranks.
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Old 10-11-06 | 09:13 PM
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a shimano 107 and 110 have the same length spindle on the drive side. i.e. they'll give you the eact same chainline.
the extra 3mm on the 110 are all on the non-drive side.
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Old 10-11-06 | 09:15 PM
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Originally Posted by SaDrago
On the IRO website, it has the cranks shown with the chainring attached on the inside on the arms. It also recommands using a 110 mm BB to achieve a 42 mm chainline. If I were to get the 107mm bb, would I be able to mount the chainring on the outside of the arms? (if it matters, the wheels i have are IRO/areohead, 120 spaced) Thanks

-§teve
107 and 110 asymmetrical bb's have the same length on drive side spindle. either will produce proper chainline when used with the iro cranks. mount the chainring on the back of the spider where it belongs.
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