K2 / Proflex Riders Group

General => Tech Forum => Topic started by: bayarearider on December 09, 2003, 05:11:31 am

Title: Bending rear derailleur hanger RK011 or replacing?
Post by: bayarearider on December 09, 2003, 05:11:31 am: I've never bent or replaced a derailleur hanger before. But mine is bent and is due for one or the other. My frame is using the RK011 hanger (98-03 FS frames), have you guys had luck bending these? Or are they too hard and basically crack when you try?

Also how much do they usually run if i decide to just buy one?

thanks guys! [smiley=beer.gif] [smiley=beer.gif] [smiley=beer.gif]
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: numbnuts on December 09, 2003, 06:27:52 am: Do both ! I my experience it is not a problem to bend them back but I suppose it will weaken the metal a bit. I have had to bend mine a few times. So bend it but set yourself up with a spare anyway and it's not a bad idea to stick one in your camelbak, that saved my day once. They can't cost a lot, I got a non-genuine one from BETD in the UK cos it was more convenient at the time', it didn't cost much and was shipped in a regular envelope.
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: bayarearider on December 09, 2003, 09:42:01 am: HEy numbnuts,

Which section is it located on the site? I couldn't find any derailleur hangers on BETD. Which frame did you buy it for?
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: GaryF52 on December 09, 2003, 10:22:43 am: It's not very difficult to straighten the hanger. Remove the wheel and derailleur and use a 12" adjustable wrench to bend it straight. You can even make fine adjustments with the derailleur still mounted.
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: jimbo on December 10, 2003, 05:04:22 am: Quote
It's not very difficult to straighten the hanger. Remove the wheel and derailleur and use a 12" adjustable wrench to bend it straight. You can even make fine adjustments with the derailleur still mounted.

It is easy to bend back, but I could not get the shifting right again. I could get the vertical alignment right, the horizontal alignment was probably the cause of lousey shifiting. The shifting was good enough to keep me riding till I got the new hangers. ;D
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: Simon on December 10, 2003, 08:26:46 am: Quote
HEy numbnuts,

Which section is it located on the site? I couldn't find any derailleur hangers on BETD. Which frame did you buy it for?

Have a look at http://www.betd.co.uk/website/DROPOUTS.HTM
Simon [smiley=nod.gif]
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: Old Proflexer on December 10, 2003, 10:00:27 am: sometimes a long metric bolt is best to use when rebending/straightening a hanger on the frame. road bike mechs use a tool specifically that does just that to straighten frames.

other than that, i've more than once heated a slightly bent hanger and tapped it flat on the concrete of my garage floor with a either a hammer or a piece of wood over the hanger and tap flat.

potential damage to the hanger depends on the amount of the bend from the crash. always good to have a spare or two.

beats tweaking the frame -

OP
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: bayarearider on December 10, 2003, 01:34:09 pm: Hey proflexer,

I like the heating idea. Did you just use a small torch to it? So is a good rule of thumb, Hanger Flat flush flat to the ground = straight hanger?

Also i have heard of riders sticking rods or screwdrivers into the hole where the deraillur mounts and bending from there. Isn't there a danger destroying the threads on the hanger?
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: Old Proflexer on December 11, 2003, 02:04:57 pm: i have a preference to take the derailler hanger off and put it in a vice (w/wood blocks) heat and rebend to near straight.

then put the thing either on a piece of hard wood or right on the garage floor and tap it flat -

i've put long metric bolts in the hanger hole with it still attached to the frame and have just such long bolt for that specific purpose. a screwdriver or such can mess up the threads on the soft aluminum hanger.

OP
Title: Re: Bending rear derailleur hanger RK011 or replac
Post by: Carbon_Angus on December 11, 2003, 02:45:24 pm: if you decide or find out you can't get it right, you can get one from an LBS for about $15 give or take

i'd try to fix it and buy two.

one i'd put on, the other would be a spare.

[smiley=beer.gif]
Title: Re: Bending rear derailleur hanger RK011 or replacing?
Post by: Intense One on December 23, 2017, 02:52:11 pm: I would only straighten out a bent derailleur hanger just to get me out ofthe woods. It’s est to replace it a new one and buy an extra one or two with you in your pack just in case you break one again. They’re designed to bend/ break to save damaging your frame. It’s either carry a spare or you’ll either be making a single speed quick fix to get you back or walking it out! 🤨
Title: Re: Bending rear derailleur hanger RK011 or replacing?
Post by: serviceguy on December 24, 2017, 05:23:13 pm: That part is easily available on e-bay. I bought a few that shipped directly form China, the first one even had the K2 logo on it.
Title: Re: Bending rear derailleur hanger RK011 or replacing?
Post by: orange on December 28, 2017, 08:11:35 am: holy thread resurrection! 14 years. That's not bad...
Title: Re: Bending rear derailleur hanger RK011 or replacing?
Post by: Intense One on December 30, 2017, 07:51:37 pm: Bent derailleur hangers will always be with us so their duscussions will never end, unfortunately. If they don't bend or break, then we 're riding a little too easy! :)