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Thread: Chain adjusting tool

  1. #1
    Senior Member Gerry's Avatar
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    Device to measure chain tension

    Had some spare time and an idea. Gerry

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    Last edited by Gerry; 09-18-2015 at 01:50 AM.
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  2. #2
    Senior Member Fred's Avatar
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    Gerry, once again I like your use of rare earth magnets. More of a rather clever measuring device, or gauge, rather than a tool. I was hoping to see some new tool to adjust axle position without first properly putting bike on a stand so the tire is off the ground. Rag still works between sprocket and chain to move axle forward. However to move axle rearward with the new extended swing arm I find myself needing an equally extended pry-bar to fit between tire tread and front of swing arm.
    Nice prototype, thanks for taking time to make and share video with us.
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  3. #3
    Senior Member Gerry's Avatar
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    Fred, some years ago I made a tool that might work for you. It indexes the holes in the rear axle adjusting snails and provides leverage to use the snails to force back the rear axle. The tool I am making reference to can be seen to the extreme left. I will check it in the morning to see if it works with the wheel still on the ground. Gerry
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    Super Moderator littletommy's Avatar
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    You are one cool guy Gerry. The gears in your head are always turning. I like that.
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    Senior Member Fred's Avatar
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    +1, Gerry is one clever inventive fellow.
    I shall now go adjust my new o-ring chain without the benefit of Gerry's fine tool set up and see if a scrap 2x4 will still be capable of levering axle rearward. I could put bike on stand to move axle rearward a bit more than necessary,but would then need to put bike back on ground to finish adjustment and engage snails in the proper detents.
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  7. #6
    Senior Member Gerry's Avatar
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    Fred, working on your tool as you post. Your tool will be more robust than mine, as I know you are a 'robust' type of guy. I tried my tool this morning and was able to move the axle forward/back with out elevating the rear wheel. Don't know what you use to loosen your axle nut, but perhaps you might want to add this to your order. Gerry
    Last edited by Gerry; 09-18-2015 at 05:08 PM.
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  8. #7
    Senior Member TWROG's Avatar
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    Cool tool I just use a tape measure setting on its back side with enough of the blade out for one of the "inch" marks to line up with the bottom of the chain then lock the blade down. Hands free measuring

    I am a little confused on the difficulties of moving the axle for and aft though. I use the adjusters themselves to move the axle back, then smack the tire with my 5 pound dead blow to make sure its seated in the adjuster detent. That obviously wouldnt work on the trail cause I dont take my dead blow with me but a swift kick with my boot would work just as well.
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  9. #8
    Senior Member TWROG's Avatar
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    Quote Originally Posted by Gerry View Post
    Fred, working on your tool as you post. Your tool will be more robust than mine, as I know you are a 'robust' type of guy. I tried my tool this morning and was able to move the axle forward/back with out elevating the rear wheel. Don't know what you use to loosen your axle nut, but perhaps you might want to add this to your order. Gerry
    Is that something you bought or made? I need one
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  10. #9
    Senior Member Gerry's Avatar
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    Made the tool. Welded sections of steel square tube stock to TW tool kit wrench. Gerry
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  11. #10
    Senior Member Fred's Avatar
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    Gerry, please don't go to any special effort on my behalf as far as any chain adjusting tools goes. Once I remove the initial stretch from my new-ish O-ring chain I should be able to go many a mile between infrequent adjustments....or so says the scuttlebutt here.
    I was just admiring your ingenuity.
    From your video it seems your Mister Gismo-mobile is not exactly in stock configuration. After wrestling my Betty Boop out of a silty trench she dug herself into last week I am starting to appreciate your bike-lifting rod idea. Either I am loosing some stamina at elevation or Betty is putting on weight 'cause lifting the TW is not as easy as it was a decade ago. Oh to be a teenager again!
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