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Derailor Hanger -- Bending Prevention

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Derailor Hanger -- Bending Prevention

Old 05-28-19, 10:53 AM
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Derailor Hanger -- Bending Prevention

Is the derailor the achilles heel of a bicycle?

I documented my bent hanger last time. I was in a rush to ride, then realized I forgot my sunglasses. I quickly leaned my bike against the brick wall on the corner of the garage. When I came back out with my sunglasses and ready to do a training session , I saw my bike on the ground. I picked it up and rode off, but quickly realized something terribly wrong. The chain was very noisy and shifting was not calibrated. I ended missing the ride. And I was very upset I wanted to throw the bike into the river. That day, it a heavy load: two water bottles, and a h-bar bag with alot of stuff in it. Perhaps, the extra weight caused a harder fall.

That was the last and only time I tipped over a bike with derailor. Eversince, I've always been super paranoid about leaning my bike against anything for fear of another tip over fiasco. Find the perfect spot so your bike don't roll and fall down.
Yeah. So...I sometimes spend alot of time finding the perfect spot to lean my bike. But imainge, having to ride 50 miles on a bent derailor would really sux.


I see low-end Walmart bikes come with a metal guard over the derailor.

What do you think about adding your own guard modified from something like this.


Last edited by mtb_addict; 05-28-19 at 12:23 PM.
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Old 05-28-19, 12:27 PM
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It makes sense on one level.

On the other I've ridden 30 years including countless mt. bike mileage, had road and off-road crashes, never bent a derailer.
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Old 05-28-19, 12:29 PM
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Derailleur


No.

There is an inexpensive tool that you can get to measure and adjust it:

https://www.abbeybiketools.com/products/hag

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Old 05-28-19, 12:46 PM
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Originally Posted by wgscott View Post
Derailleur
There is an inexpensive tool that you can get to measure and adjust it:
https://www.abbeybiketools.com/products/hag
Yes, but you are not going to be carrying that thing in your saddle bag.
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Old 05-28-19, 12:49 PM
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Originally Posted by Steve B. View Post
It makes sense on one level.

On the other I've ridden 30 years including countless mt. bike mileage, had road and off-road crashes, never bent a derailer.
Yeah, most time, it's easy to find a good wall that grip the saddle really well so wheels don't roll.
But last time, I struggle to find a good spot...so I just decided not to go into the store, and keep riding. LoL.

But when I go to those charity bike rides, I saw quite a few times, bikes tip over. Some people lean two bikes against each other, but fall over after awhile. Maybe these fancy road bikes are so light weight, that there's not enough mass to bent it.

Last edited by mtb_addict; 05-28-19 at 12:53 PM.
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Old 05-28-19, 01:18 PM
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Carry a strap to hold the front brake lever on. Works remarkably well to keep the bike stable when leaned on something. I prefer a Velcro strap since it's small, cheap, re-usable 100's of times and easy to take on and off.
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Old 05-28-19, 02:12 PM
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Those ugly derailleur guards work.
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Old 05-28-19, 02:21 PM
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Originally Posted by noglider View Post
Those ugly derailleur guards work.
It seems like a no brainer that every derailleur bike should come with one. It probably cost 25 cents each.
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Old 05-28-19, 02:37 PM
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Originally Posted by mtb_addict View Post
It seems like a no brainer that every derailleur bike should come with one. It probably cost 25 cents each.
Yes, and the same goes for spoke protectors. But we are vain, and we don't want ugly things, even though they are useful. I don't use either, even though I should.

But it is also true that you can build habits that make them mostly unnecessary.
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Old 05-28-19, 04:01 PM
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Originally Posted by noglider View Post
Those ugly derailleur guards work.
Sometimes.

I've also had to bend the derailleur guard back out before I could adjust the derailleur.
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Old 05-28-19, 04:02 PM
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Originally Posted by mtb_addict View Post
Yeah, most time, it's easy to find a good wall that grip the saddle really well so wheels don't roll.
But last time, I struggle to find a good spot...so I just decided not to go into the store, and keep riding. LoL.

But when I go to those charity bike rides, I saw quite a few times, bikes tip over. Some people lean two bikes against each other, but fall over after awhile. Maybe these fancy road bikes are so light weight, that there's not enough mass to bent it.
If you lay your bike on the ground it can't fall over.
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Old 05-28-19, 04:20 PM
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I had a bike get knocked over a couple of weeks ago. Someone was not paying attention to where they were going and walked right into it. It was leaning against a wall and went down fairly hard. I was very lucky. The bike landed on the left brake lever, drop bars, and the left pedal. It is a bike that I just completed re-building.The only thing that happened was the brake lever being forced both up and to the side of the handlebar, and a minor scrape on the pedal, which is an old set already scraped up. I could not believe that I found so scratches, chips, dent or anything else on the recently powdered coated frame. I did, however. put a chip in the seat tube where the front derailleur clamps to the tube. It is not seen with the derailleur mounted. Things happen.
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Old 05-28-19, 04:52 PM
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Originally Posted by Retro Grouch View Post
Sometimes.

I've also had to bend the derailleur guard back out before I could adjust the derailleur.
I imagine it would have been worse without it.
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Old 05-28-19, 05:05 PM
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Never lean a bike toward the derailleur side.
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Old 05-28-19, 05:23 PM
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Originally Posted by mtb_addict View Post
Yes, but you are not going to be carrying that thing in your saddle bag.
It is small and light enough that you could.
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Old 05-28-19, 05:29 PM
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Originally Posted by dedhed View Post
Never lean a bike toward the derailleur side.
It is a law of the universe.

No matter WHAT you do--some idiot is going to find some way to get your bike to fall over RD side down. "Some idiot" includes many careless fellow riders.
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Old 05-28-19, 08:33 PM
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Originally Posted by Crankycrank View Post
Carry a strap to hold the front brake lever on. Works remarkably well to keep the bike stable when leaned on something.
Cheap, light, effective:

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Old 05-28-19, 10:48 PM
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Thick plate , steel , dropouts and having panniers full so even if the bike fell over


the RD did not hit the ground..

worked well ..
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Old 05-28-19, 11:33 PM
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I stick to the good old replacable claw adapter in combination with friction shifting.
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Old 05-29-19, 06:16 AM
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Always lean your bike with the derailleur towards the wall, tree, or whatever. Then, if it falls, it'll land on the cheaper side.
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Old 05-29-19, 12:58 PM
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It's not a flaw its a feature. Better the hanger bends than the frame
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Old 05-29-19, 10:08 PM
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Originally Posted by wgscott View Post
Derailleur


No.

There is an inexpensive tool that you can get to measure and adjust it:

https://www.abbeybiketools.com/products/hag

Oooh. That is affordable!

-Matt
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Old 05-30-19, 10:24 AM
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Originally Posted by MattTheHat View Post
Oooh. That is affordable!

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At least you get what you pay for.
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Old 05-30-19, 11:45 AM
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You can fix derailleur hanger alignment with any rear wheel with a threaded 10mm axle and a ruler
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Old 05-30-19, 12:22 PM
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Originally Posted by fietsbob View Post
Thick plate , steel , dropouts and having panniers full so even if the bike fell over


the RD did not hit the ground..

worked well ..
Hey! You could put automagic air bags in a pannier. The pannier could even be flat most of the time. Like that new motorcycle suit with built in air bags.
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