Cool vid on straightening bent derailleur hangers

[fmradio516]

Havent tried it myself, but I have plenty of bent hangers and no special tool to fix em. Will give this a shot:

https://www.youtube.com/watch?v=TnwreRrorIA

[Dave]

I bought the park tool many years ago. No clue what it cost, but it was money well spent. I use it on every new frame and I've needed it to fix wreck damage a number of times.

[dancinkozmo]

RJ the bike guy RULES !!!!!

[ultraman6970]

This is funny, i used to do that many years ago with an old campy wheel IMO works better than anything. No yanking too much just slight touches to the wheel.

[bikinchris]

Shimano rear axles of that era had 10mm by 1mm thread pitch. Other companies could have 10mm axles, but use 26 threads per inch thread pitch.

[Peter P.]

A correction to the video: You don't need to measure "to the front" as RJ The Bike Guy says (the rim section behind the seat tube). Three points form a plane (flat surface), and it's a pain, particularly when using the Park Tool, to position the tool in that location. Top, bottom, and to the rear will provide all the points you need to accurately align the derailleur hanger.

Error of +/-4mm will provide accurate shifting.

[fmradio516]

Originally Posted by Peter P.

A correction to the video: You don't need to measure "to the front" as RJ The Bike Guy says (the rim section behind the seat tube). Three points form a plane (flat surface), and it's a pain, particularly when using the Park Tool, to position the tool in that location. Top, bottom, and to the rear will provide all the points you need to accurately align the derailleur hanger.

Error of +/-4mm will provide accurate shifting.

Good point! Thanks!

[phoenix]

I finally purchased the Park DAG a year or so ago, and it can be worth it’s weight in gold. With that said, this wheel hack is pretty darn clever!

[Gummee]

Most of my derailleur straightening is done with my folding wrench set and an eyeball.

It's easier to listen for clattering in the derailleur and tweak as needed.

M

[oldpotatoe]

He must not have cut cable bits or other pieces of sharp metal on his floor..stocking feet...

Interesting and yup, dear hanger 10by1 like all 'common' threaded axles! Shimano-esque.
Campag are 10by26 and some low end 9.5by26. Solid 10by1 axles not that unusual but in a complete wheel, probably 9.5 by26..

[bikinchris]

Originally Posted by oldpotatoe

He must not have cut cable bits or other pieces of sharp metal on his floor..stocking feet...

Interesting and yup, dear hanger 10by1 like all 'common' threaded axles! Shimano-esque.
Campag are 10by26 and some low end 9.5by26. Solid 10by1 axles not that unusual but in a complete wheel, probably 9.5 by26..

And some could even have 3/8 axles. In other words, don't ruin the threads of your hanger forcing it with this method.

[Pegoready]

RJ is alright, but I lost respect for him when he showed a video clamping a threadless stem to the threaded section of a 1" fork in a misguided "convert a threaded setup to threadless" how-too video. Dude is a diet coke drinkin', socks in the garage wearin' hack. His DIY attitude is entertaining sometimes though.

[fmradio516]

on the subject, anyone try this budget tool? https://www.chainreactioncycles.com/...xoCSHcQAvD_BwE

[CMiller]

I have the CRC tool, I haven't used in a bit but from what I remember it really only worked in one direction accurately, as a pull or as a push, because the attachment point had a bit of slop. Hope that makes sense! For my very infrequent use I like it but it is no way a shop tool.