PdalPowr

Hello,I haven't posted in a while.
Moving took up all my time.🤗
Also I broke my deraileur.😶 I was riding along and
suddenly the rear wheel locked right up. Looking down
I saw my rear deraileur straight up instead of down.
It was also caught up in the spokes. I carefully pulled the deraileur out.
Repositioning it downwards. Unfortunately it broke. What broke was the
incredibly thin plastic housing for a spring. Very cheaply made.
But I am not crying,things break. It was a shimano tourney.
I got the exact same one. It wasn't that easy to replace.
But now I know how........more or less.🤗

It won't shift into the seventh gear but I am guessing thats just an adjustment.
The thing is the bike wobbles. It doesn't wobble all the time.
But I am thinking at least once per revolution.

I tried to check to see if the wheel was true.
Hard to do without a mechanics stand.
That certainly wasn't conclusive.
I tried an old trick where you get the wheel up to speed then see if the brake pads applied evenly.
Any ideas on what I could/should do?
The only bike shop is several towns over.

Andrew R Stewart 

Sounds like the common der got snagged by a spoke. Typically the der had earlier been bent inwards so the limit screws no longer restrained the der's being able to travel fra enough to engage the spokes. Sometimes the chain can jump about and snag on the cage's sides and also pull the der up and in. Sometimes a pulley bolt can unthread enough to do this. Sometimes a stick/twig can get kicked up and into the spokes, then is carried into the der. Forensic analysis sometimes offers some reasons, sometimes not so much. Do look for the frequently found secondary damage. Rim out of true, spokes pulled out of rim, bent axle, bent or opened dropout/slot, twisted chain links. Andy

Miele Man

Where in Canada are you?

Hang the bike so that the rear wheel is off the ground. Spin the rear wheel and watch it from behind. You'll be able to see any wobble. Check your derailleur hanger to see if it's bent.

Take an image of the bike from behind looking straight along the wheel and make sure the image shows the derailleur hanger and derailleur. Post that image. We might be able to tell if the hanger is bent.

Cheers

Andrew R Stewart 

Now that the incident has happened I would be surprised if the hanger wasn't bent. See my list of secondary damage. Andy

AnkleWork

Things don't necessarily break. Going forward, maybe focus more on prevention.

davidad

Straighten the der. hanger and install a spoke protector.

Miele Man

If we knew about where you are we might be able to recommend someone to look at it for you.

I had a chap bring an old Steve Bauer bike to my place so it could get overhauled. I showed him what to do and the bike was just like new when we finished with it.

Cheers

Andrew R Stewart 

Most spoke guards are not large enough to overlap with the der cage's location. Their purpose is to protect the spoke ends from the gauging and damage the chain causes when over shifted past the large cog, not to keep the der from entangling in the spokes. Andy

davidad

A friend did the same thing on a new tourer and the protector did it's job in that case. Couldn't hurt.

PdalPowr

Thanks for the pertinent input.
Unreliable data I know but just hoisting the rear wheel and pedaling while looking makes me thing there is a wobble at one spot. I will give the wheel spokes a better look. The hanger seems O.K.. But as you say practiced eyes are best. Unfortunately up 'til now I haven't been able to post a pic'. I will try again. In the meantime I will look for loose or damaged spokes.

Thanks

PdalPowr

I am in Ontario.
Unfortunately I am also doing repairs to get my home ready for Winter.
It takes up most of my time. It would be great to get my butt back on two wheels.
I am going to give the bike a better inspection.

Thanks a bunch.😉

PdalPowr

I will look up that list.
Yes I as well was surprised to not see at least damaged or bent spokes.
It was definitely a moment for me to look down and see the derailer bent upwards. 🤗😮🤗

Miele Man

I am near Kitchener Ontario Canada.

I have two swag lamp hooks in my ceiling. I have an either inch braided nylon cord with a loop at each end. I have a shorter cord also with a loop at each end. The longer cord goes over the swag hook and then a loop is place on each brake lever. One end of the shorter cord is place over the other swag hook and the other loop is place over the rear of my saddle. The cords have been adjusted so that the drive train of the bike is nearly at eye level. That's how I do most of the work on any of my bicycles or other bicycles I fix for people.

If it were me, I'd remove the rear derailleur from the frame but without disconnecting the cable. Then I'd lay a straightedge vertically along the derialleur hanger. If the derailleur hanger is bent that'll show that it is.

If the bicycle is supported somehow with the rear wheel off the ground then it's much easier to see if the wheel is bent, how much it's bent, and if working on it, how any work is affecting the wheel.

The reason I asked where in Ontario you are is because I thought that perhaps we could meet up somewhere and I'd take a look at the wheel for you.

Good luck and cheers.

PdalPowr

Very interesting and well said.

I got the bike well supported and got the back wheel spinning.
To me there is an evident wobble the same place every rotation.
I then gently applied brake pressure. One pad would contact
the rim every rotation. It was the pad on the derailleur side.