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  1. #1
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    Chain rub on guard... ideas?

    I've recently switched my bike to a single chainring. All in all I really like it, but my chain rubs in the two smallest cogs of my cassette. I need those two cogs when on the road since I'm running such a small chainring.

    Configuration:
    TruVativ Elita Cross GXP External Bottom Bracket
    39T mounted on the inside
    BBG Bashguard mounted outside - 42T max
    Redline Chain Keeper
    SRAM PG950 9 spd cassette, 12-26

    What are some suggestions to try? Guard and chainring closer to the same size? Longer spindle? Washers to push the guard out a bit?

    TIA! Kirk

  2. #2
    here's mud in yer eye! crossthreaded's Avatar
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    I run a "similar" single chainring 36t w/ 42t franken-grind guard. But I haven't noticed any rub on the guard. I think the washers/spacers inside the guard would be the easiest/cheapest way to go. You may want to get sets of various gauges to eliminate the dreaded "gotta go back to the shop again". Hope you solve the problem.

  3. #3
    Senior Member Milice's Avatar
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    What is your chainline like? It may be possable that you need to install a size larger bottom bracket.

  4. #4
    worst luck ever ~stella's Avatar
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    Quote Originally Posted by Milice View Post
    What is your chainline like? It may be possable that you need to install a size larger bottom bracket.
    OP said they have an exo bottom bracket.

    washers/spacers are your friend...

  5. #5
    Senior Member Milice's Avatar
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    Quote Originally Posted by ~stella View Post
    OP said they have an exo bottom bracket.

    washers/spacers are your friend...
    Correct, we had to space out a friends redline.

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