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  1. #1
    Senior Member rootbeer's Avatar
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    Upgrading IRO cranks to sugino messenger. Wanting to try 1/8. Thoughts and advice?

    So this seems to be the majority of IRO owners first upgrade.

    So from what I gather I'm going to need a Sugino Messenger crankset, a new BB, and a new chain. Am I also going to need to get a new HUB as well? Is there any other crankset I should consider other than the messenger? Thanks y'all

  2. #2
    Senior Member rootbeer's Avatar
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    Hrmm the make a Messenger in 3/32...actually I think I'll stay 3/32 for awhile. I don't see the reason to spend tons of money replacing parts just to try to run 1/8 lol

  3. #3
    Senior Member renton20's Avatar
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    Just a note, this isn't much of an upgrade. If you really want nicer cranks spring for omniums

  4. #4
    Senior Member kellencorkill's Avatar
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    You won't need a new hub, even if you wanted a new 1/8 cog, which isn't necessary because 1/8 chains work with 3/32 cogs. Just get a new cog and switch them out. You may even not need a new bottom bracket, I believe the sugino messengers want a 103x68 JIS taper, such as the sugino BB3. I'm not sure what comes stock on IROs.

  5. #5
    Senior Member Deshi's Avatar
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    3/32 is quiter in mt experience. I like 1/8 but I personally run 3/32 for the quietness of the drivetrain. I have yet to brake a 3/32 9sp chain on any of my track bikes anyway.
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