using MRP to tension chain- Mtbr.com
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  1. #1
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    using MRP to tension chain

    I ride a .243 4130 with vertical dropouts and would like to convert to single speed. Right now I have an MRP LRP on there with a standard single ring roller as a chainguide, and a 9 speed XT rear setup. Could I use no tensioner in the rear and use the chainguide arm/roller to tension the chain? The roller/arm can be moved up and down along the arm so it seems like I could get good tension by tightening the roller when the chain tension is optimal. If I don't move the roller, I could swing around the arm to tension the chain, as it's BB mount, NOT ISCG mount.

    Converting my cassette hub is not an issue, I will just buy a King Kog and a single speed kit. The hub I am using is a Hadley 108PT hub with Ti fun bolts and Ti freehub body.

    OR, I could just suck it up and buy a surly singleator. Which one?

  2. #2
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    On my Surly Instigator, I attempted this exact method.
    Bottom line, there isn't enough adjustment in this method to achieve chain tension.
    We scrapped the idea.
    Went to the Singulator idea, broke 2 before even leaving the shop.
    Struggled for 2 months with the Soulcraft Convert, with it constantly popping loose under load.
    Best bet....The ENO eccentric disc hub...
    It's a pricey way out..but if you really like that frame...get it done...

    Question...which .243 frame doesn't have horizontal dropouts?

  3. #3
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    it's an 02 frame... before they started using the solid plate gusset. My gusset is perforated and doesn't have the maple leaf on it. It also has an MTB BB, which I like.

  4. #4
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    for a setup like yours ...

    I think the rollenlager would be a better choice. It's burlier than the surly, and seems designed with some hucking in mind (which i assume you do, given the .243 frame). It's hands-down the tensioner i would choose for any conversion setup.

    I, personally, would be scared of hucking with an Eno hub - doesn't seem like the intended use to me ... but i could be wrong. It seems like it might slip on big hits too.

    Check out the rollenlager:

    http://www.rennendesigngroup.com/
    Attached Images Attached Images

  5. #5
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    you were right padre... didn't work. I was actually able to connect the chain with no tensioner, but a touch too much tension. So, I guess i'll be going with the rollenlager or singleator.

  6. #6
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    Quote Originally Posted by MD Bullit
    you were right padre... didn't work. I was actually able to connect the chain with no tensioner, but a touch too much tension. So, I guess i'll be going with the rollenlager or singleator.
    It's frustrating, huh!
    It seems like it should work, and be much cleaner look too..but oh well.

    If I were you, I'd try the rollenlager first. That Singleator isn't very stout.

  7. #7
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    Quote Originally Posted by Padre
    It's frustrating, huh!
    It seems like it should work, and be much cleaner look too..but oh well.

    If I were you, I'd try the rollenlager first. That Singleator isn't very stout.
    I am going the other, more expensive rout, and buying the 05 .243 4130 that has horizontal dropouts with a built in tensioner.

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