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  1. #1
    Senior Member mijome07's Avatar
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    converting a stock 2x9 to a 1x9 'cross monster

    I bought my 1st 'cross bike last month. It's a Motobecane Fantom CX. I removed the front derailleur and shifter cable. I'm gonna replace the 36/50T chainrings with a 42T. What chainring do you recommend? I know I don't need one with ramps/pins. Now for the 'cross guards. Is it best to have one on each side? Or does that come down to personal preference? I'll appreciate your comments and/or expertise.

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    Last season I used a standard Sugino 42t chainring, a Salsa Crossing Guard on the outside, and an N-Gear Jump Stop on the inside. No problems.

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    Team Beer Cynikal's Avatar
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    I'm going to order 2 superlight guards from BBG and use them on either side. This will be cheaper too.

    http://www.bbgbashguard.com/
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

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    Quote Originally Posted by Cynikal View Post
    I'm going to order 2 superlight guards from BBG and use them on either side. This will be cheaper too.

    http://www.bbgbashguard.com/

    Cynikal, I'm sure you know this but I'll put it up as general information...

    ...when making a chainring sandwich, make sure your bolts are long enough, and they have spacers...


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    Team Beer Cynikal's Avatar
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    I was wondering about that. Is there a certain mm of stack bolts I need to find?
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  6. #6
    M_S
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    This thread interests me too. I wanna go 1 x 9. Do you guys run the bashguard in the big ring position? (noooobie).

  7. #7
    Team Beer Cynikal's Avatar
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    Yep and one spaced out to the inside.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

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    Quote Originally Posted by Cynikal View Post
    I was wondering about that. Is there a certain mm of stack bolts I need to find?

    I think they are 15mm. I overpaid for mine at CXworld. I'll measure and report back if they aren't 15mm.

    From outside to inside, I'm running guard in the big ring spot, chainring on the inside spot, spacers, then inside guard. Just barely clears the chainstays.

  9. #9
    M_S
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    Ok. I think I'm going to run a bash in the big ring spot, chainring in the little ring spot, and an n-gear jump stop. Good enough?

    (Sorry for the thread jack).

  10. #10
    Senior Member mijome07's Avatar
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    I was going to purchase 2 Salsa Crossing Guards, but that's like $80, minus shipping and/or tax. I'm gonna order some from BBG. I thought you can only use chain retention rings for this setup. But I guess a bash guard is suggested too. Thanks guys.

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    Quote Originally Posted by M_S View Post
    Ok. I think I'm going to run a bash in the big ring spot, chainring in the little ring spot, and an n-gear jump stop. Good enough?
    That's what I ran last season, no dropped chains. I also made the chain as short as possible, I think that helps keep it on the ring.

  12. #12
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    Quote Originally Posted by mijome07 View Post
    I was going to purchase 2 Salsa Crossing Guards, but that's like $80, minus shipping and/or tax. I'm gonna order some from BBG. I thought you can only use chain retention rings for this setup. But I guess a bash guard is suggested too. Thanks guys.
    I'm using two BBG "bashguards" with no ill effects. I'm not sure what the real difference is between a true bashguard and a chainguard is, maybe thickness and ability to take a hit. My BBGs are plenty light, and not that thick, and the whole set of two guards and bolt kit cost what one Salsa would cost.

  13. #13
    antisocialite dirtyphotons's Avatar
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    one other thing to remember. none of these setups are idiot proof.

    i have a teammate who ran a single ring, outer bashguard and inner jump stop and still threw his chain in about half his races last season. not because it was a bad setup, but because he didn't know how to put his bike down.

    singlespeed, however, is idiot proof.
    Quote Originally Posted by Sheldon Brown
    Because when fashion conflicts with function, I vote for function.

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    Quote Originally Posted by dirtyphotons View Post
    singlespeed, however, is idiot proof.
    Nope.

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    Team Beer Cynikal's Avatar
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    Also remember, as soon as you build something "idiotproof" somebody builds a better idiot.
    I'm not one for fawning over bicycles, but I do believe that our bikes communicate with us, and what this bike is saying is, "You're an idiot." BikeSnobNYC

  16. #16
    uberNEWB dzinehaus's Avatar
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    +1 Hahahaha
    Be Happy, Live Life, Be Strong ~j.michaud / dzinehaus

  17. #17
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    I've run my 1x9 CrossCheck a few thousand KM with 34 t chainring and 11-34 cassette;
    Salsa Ringdinger on the outside and Dog fang on the inside. While I don't race; i do ride
    year around in all sorts of conditions and dirt/gravel roads, plus an occasional dirt trail
    or across a field. Cannot recall the last time I dropped the chain.

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