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  1. #1
    paintbucket
    Reputation: wooglin's Avatar
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    Convertible (warning--gearie content)

    Thought I'd share my latest project, because I haven't seen anything quite like it here. I typically ride a 1x1 with a sussy fork, but for long stretches of relatively level fire road like we've got down here, it can't compete with a gearie. What I needed was a geared hardtail, so I've been fooling with my old Stumpjumper. I didn't want to make it exclusively geared, because its fun to ride as a rigid SS. No tensioner because its got semi-vertical dropouts--that's a 36x18.

    <img src ="https://gallery.consumerreview.com/webcrossing/images/djrwdt153.jpg">

    That still didn't solve my gearie problem, but because its built with a 7sp cassette hub and spacers I can also build it as a 1x7. I probably wouldn't have tried it with 9sp because of potential chain/cassette/chainring problems (are those justified concerns?), but 8sp chains fit on 7sp cogs just fine. I used a road cassette for the close gear spacing. It gives me a 36x23 granny gear (more than enough for climbs) and a 36x13 top end. A short cage derailleur would be nice.

    <img src ="https://gallery.consumerreview.com/webcrossing/images/1x7a.jpg">

    The right grip is a lock-on so I can get the shifter off and on easily. The shifter itself is an old thumbie set to friction mode, which eliminates a lot of fiddling around during set up. I was never any good with that indexing crap anyways. With slotted cable stops I can get the shifter and derailleur off and on without having to pull the cable, although I also have to take off the plastic cable guide under the BB shell. Other than that, its just swapping out the cassette for a cog and spacers, taking off the front derailleur (functioning as a chain guide), and switching to the SS chain. Gotta love powerlink chains,

    <img src ="https://gallery.consumerreview.com/webcrossing/images/1x7shifter.jpg">
    When the going gets weird its bedtime.

  2. #2
    King Pin
    Reputation: xrmattaz's Avatar
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    ... and if we just ... nice

    I have almost ed zachary the same setup on my commuter!

    Old steel Stumpy/same Deore shifter/34 tooth front/Ultegra 12-25 7spd. rear cluster with my NOS DuraAce 6/7spd. derailleur. No front derailleur, tho. Full length cable housing would make yours even easier to convert...just a few zipties. (that's what I did, since hacking off the cable stops a few years back...)
    Attached Images Attached Images

  3. #3
    ...
    Reputation: (Tom)'s Avatar
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    I've seen a fair amount of bikes posted here that can be easily converted to ss (non tensioner) to gears I wanted this option of going geared or ss when I ordered my new frame from IF !

    There are more than a few ways you can accomplish this - EBB with gear hanger, horz. dropouts with hanger, Kona style sliding dropouts, just to name a few - and after over analyzing the situation I decided on the horz. dropout and gear hanger route. Here are some pics.

    "High school" drop outs made by paragon machine works.


    Built up in SS mode.


    Here it is 1X9 mode. The shifting is a little cranky in the lower gears but it's still reasonably good with an 11-32. Might not work too well with a 11-34. Like your stumpy the shifter & derailer all come off as one unit. I plan to get some lock on grips when these wear out to make the switch easier.


    Yeah looks like a surly karate monkey with 26" wheels but hey I really like the looks of the IF brit racing green.

  4. #4
    mtbr member
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    another option

    if you run a chain guard and a "third eye" chain keeper you won't have to fuss with a front derailleur. The third eye clamps to the seat tube and fulls the space between the tube and the ring so the chain can't derail. cost about $8

    For a cheap chain guard, grind the teeth of an old ring.

    makes for an easy quick swap and keeps the clean look.

    Nice rig!

  5. #5
    paintbucket
    Reputation: wooglin's Avatar
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    Yeah, I like the versatility of gears/no gears, and there's clearly several ways to skin that cat. I just hadn't seen where anyone else had actually done it. The idea actually gelled a few weeks ago when someone asked here about whether they should get a hardtail or an SS. Why not both I thought.

    I think I'll stick with the front derailleur as a guide since I really don't like the look of bashrings. And it comes off really easily anyhow. On the lock-on grips, I've actually only used one on the right bar--the left side is a standard Oury. I don't notice the difference, and I've got a spare lock-on for other projects. Finally, full housing is a thought, but zip-ties aren't reusable. Maybe velcro?

    It is definitely a fun bike, despite being a bit long in the tooth.
    When the going gets weird its bedtime.

  6. #6
    Witty McWitterson
    Reputation: ~martini~'s Avatar
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    I agree with rockdodger. Use an N-gear jumpstop on the inside. To me, the appeal of going single ring up front is asthetic, and using a deraillieur as a keeper just doesn't look that smooth. You don't NEED to run a bash gaurd up front, as you're finding out. For $8, this is something that you can just leave on too. It's very low profile. I love mine. That is a great looking bike too.

  7. #7
    paintbucket
    Reputation: wooglin's Avatar
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    One of these jobbies, huh? I wonder how hard it would be to make that metal push part into a minimalist cage that drops right over the top of the chainring? Like the top part of the derailleur cage. Chains falling off in either direction make me nervous.

    <img src ="http://www.gvtc.com/~ngear/graphics/mount2.jpg">
    When the going gets weird its bedtime.

  8. #8
    Whiskey Tango Foxtrot
    Reputation: eSSq's Avatar
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    third on the jump SStop

    i had one on my old 1x9, and i'll use it again on my new SSanta Cruz in the event i do a little 1x9 action there, too. i've never run a 1 x anything without a bashring, so i can't comment on whether it is necessary or not.

  9. #9
    mtbr member
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    This is very similar to the way I will be setting up my new buckshaver.
    The build as planned is to go 1 x 7 to start with using an old ringle bubba rear wheel with a sachs 12-28 freewheel. I haven't decided on front gearing yet but I am thinking 34-36 tooth. Then eventually I will build up an eno rear wheel for single speeding.
    I was planning on running without a bash ring but I might be willing to get the jump stop to protect my frame. Is it really that common to lose the chain to one side or the other?

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