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  1. #1
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    Chain keeper for my fat bike?

    Yesterday while riding our local trails, twice after hitting some jumps and drops, I dropped my chain on the front chainring. I am going to chain from the Truvativ 36t that came on it to a Raceface 30t narrow wide. That may help but should I run a chain keeper too, just in case?

  2. #2
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    What bike are you riding, what rear components?

  3. #3
    Elitest thrill junkie
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    With a clutch rear derailleur, no, you don't need to run a chainguide. I've been DHing for years now with one (racing too) and not dropped a chain.
    "It's only when you stand over it, you know, when you physically stand over the bike, that then you say 'hey, I don't have much stand over height', you know"-T. Ellsworth

    You're turning black metallic.

  4. #4
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    It's a 616 Fabrication Muenzie with a Sram sx crank and Truvativ 2x10 104bcd 36t chainring and a Sram X7 RD

  5. #5
    Why so uptite?
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    A clutched rear derailleur solves the problem.
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  6. #6
    All fat, all the time.
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    The narrow wide ring will help a lot.

  7. #7
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    I doubt I'll be changing the RD. I'm definitely going to change the 36t to a 30t narrow wide Raceface. I'll see how that works. If I never drop a chain a again, problem solved, if I do, then a chain keeper will be ordered.

    Now, should I decide to change the RD, which one should I get, Ina Sram, that's a clutched version?

  8. #8
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  9. #9
    Why so uptite?
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    The nice thing about a clutched RD is it doesn't flop when the terrain gets rough. It's basically locked out from going forward.

    Looks like SRAM calls it Roller Bearing Clutch.

    https://www.sram.com/news/introducin...ear-derailleur

    I think the chain guide is more of a bandaid.

    Quote Originally Posted by Drummerboy1975 View Post
    Keep an eye on the shipping cost if you don't spend $125..
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  10. #10
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    The RD isn't much cheaper than getting a bash guard (on the outside) and some sort of chain keeper (on the inside) and you also keep the chainring area much cleaner looking.

  11. #11
    Rippin da fAt
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    Chain guide is obsolete with the advent of type II rd's. They eliminate chain drop as well as chain slap. It almost is enough to not need the ghetto inner tube wrap on the chain stay. Although wrapping the stay with inner tube is a direct violation of the uniform bicycle code...

    Narrow/wide ring with clutch also known as type II does the trick efficiently.
    Get fAt, Stay fAt, Ride fAt
    Doctor recommended...

  12. #12
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    Quote Originally Posted by BansheeRune View Post
    ... It almost is enough to not need the ghetto inner tube wrap on the chain stay. Although wrapping the stay with inner tube is a direct violation of the uniform bicycle code...
    I'd use all those cheap-ass tacky stickers everyone keeps giving me as a sacrificial protective coating, but they'd end up as little chewed up bits on the trail.
    Crazy on this ship of fools...

  13. #13
    Rippin da fAt
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    A little strip of clear grip tape lasts very well and continues to look good.

    Chain keeper for my fat bike?-3437.jpg
    Much cleaner...

    After all, don't want the chain stay looking like it was chewed on by an alligator!
    Get fAt, Stay fAt, Ride fAt
    Doctor recommended...

  14. #14
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    Using alone, order of most to least effective at stopping a dropped chain at the front is:
    1. Full-on DH style upper/lower guide w/ roller
    2. Clutch/type 2 RD
    3. Upper BB or seatpost mounted chain guide or lower chainstay mounted guide
    4. Narrow-wide front ring

    The narrow wide phenomenon was meant to be additive to the clutch type RD craze, not really a standalone solution to all but the most mild of riding. Of course YMMV.

    The NW ring you're looking at is $40-50 depending.
    A Sram GX Type 2.1 Rear Derailleur - 10 Speed can be had for $50 as well. That's where I'd spend my money.

    If you're keep the existing RD I'd also look into shortening the chain to keep the tension higher.

  15. #15
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    I really like the look of the Bionicon chain guides, but I don't really have any experience with them. Might be a little cheaper than a clutch style RD.

  16. #16
    Why so uptite?
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    Do it right and be done with it.
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  17. #17
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    Quote Originally Posted by EBG 18T View Post
    Do it right and be done with it.
    Quality is remembered long after price is forgotten.

    Go clutched + narrow/wide chainring. Ebay or Craigslist the old ones to recoup a bit. Ride. Be happy.

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