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DIY alignment tool for Simplex Derailleur Hanger

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DIY alignment tool for Simplex Derailleur Hanger

Old 02-12-20, 08:37 AM
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KenNC
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DIY alignment tool for Simplex Derailleur Hanger

Am building up an old Peugeot, and wasn't real confident the derailleur hanger was aligned. My Park tool won't thread on, so I built up this tool from a 5/16 hardened bolt, nuts & washers, and a 4' length of angle iron. Had to periodically loosen and tighten, but worked just fine with a combination square as the "feeler" so thought I'd share!



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Old 02-12-20, 09:54 AM
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Nice work! Thanks for sharing.
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Old 02-12-20, 10:40 PM
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Nice, creative solution - very cool!
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Old 02-13-20, 05:08 AM
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Cool. I’ll pack this idea away for future reference.
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Old 02-13-20, 07:28 AM
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I work in a LBS and wanted one for home but didn't want to buy! Did a similar setup using square tubing and a steel ruler
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Old 02-13-20, 07:48 AM
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That looks brilliant. Could you please explain the geometry. What is the measurement you are looking for.
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Old 02-13-20, 08:48 AM
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I believe the square allows him to measure the distance from the steel bar to the rim. Measure on multiple spots.
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Old 02-13-20, 01:22 PM
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Nice job! Always great to see a DIY tool. I'll definitely file this for the future
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Old 02-13-20, 04:10 PM
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Originally Posted by San Rensho View Post
That looks brilliant. Could you please explain the geometry. What is the measurement you are looking for.
I use the square to accomplish the measurements the cross-rod on the Park tool does:
https://www.parktool.com/product/der...tabbed-section
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Old 02-13-20, 09:41 PM
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That's great. It's so satisfying to align a hanger with the Park tool, and this looks like even more fun in that it's homemade. I would never have thought of it, but as others have said I'm keeping the idea in my back pocket from now on.
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