DyingAndDying

Wobble so hard that the disc brake crashes into the calliper and makes this terrible sound. I heard the screws on the drop out could be bad, but that's not it. Heard the rotor could be bent, hear the rim could be bent... Bike wheel isn't trued, ball bearings worn down due to wobble. Dunno

Rolla

Too many variables, not enough info. Take it to a bike shop and have the hub, rim, rotor, and spokes looked at.

indyfabz

Sounds like negative rim stretch.

dabac

Is there a question in here or merely a rant?
Which screws would that be?
It kinda-sorta sounds like you’re talking about the screws found on some bikes with horizontal dropouts. But those just about never have disc brakes.
Sure, that can happen. Usually doesn’t take much. A bend bad enough to make a really bad sound should be readily visible.
that certainly can happen too. But there’s no realistic way for the condition of the rim to influence the condition of the brake rotor.
Worn bbs can certainly contribute to bearing play. But the usual culprit is water etc getting into the bearing and attacking the bbs. A ”wobble”causing noticeable bearing wear is hugely unlikely.

Bimmer69

No doubt caused by creeping up on women.

cxwrench

Jesus, some of the posts on here...you have no idea what the OP is trying to do or find out. C'mon people, at least try to use 4th grade grammar and post something that makes sense. It's like a sizable percentage of the members here never made it to middle school.
And of course this should be in GD, but should have been posted in 'bicycle mechanics'.

VegasTriker

Have you checked for a broken axle? It happens. It will introduce a really bad wobble. The only way to be sure is to remove the bolts that hold the wheel to the frame or open the quick release and remove the wheel. If the axle is broken it will fall out in two pieces. It could be that the only thing keeping the wheel on the bike is the quick release or axle nuts.

wolfchild

Why don't you do a little bit of investigating yourself and see if you can find the problem ??....If you don't have time or if you lack enthusiasm for tinkering with bikes, then take it to a bike shop..

Homebrew01

Hub related. Not rim or spokes. But they might have their own problems.

Iride01 

There are all sorts of possibilities that might be happening. I wouldn't completely eliminate rim and spokes, but more than a few spokes would have to be too loose and others over tensioned or the rim actually bent for that to be an issue.

Broken axle, loose cones, improper installation of most any of the involved components and etc.

More info about what your bike is and maybe a pic or two would help.

Posting in the mechanics sub-forum might have kept this thread for going downhill so fast.


Do you live near a bike shop? Doesn't cost you anything at most to just take it in and get their opinion of what the issue is. Though some of the larger high falutin bike shops might not let you near a mechanic. Most of the smaller ones are owned and run by the mechanic.

And most probably won't charge an arm and a leg to fix it. Unless there is damage that requires replacement of expensive parts.

Mojo31

Could be positive rotor wear.

indyfabz

Would that good authority be Larry S?

zandoval 

If this is not a Troll then here is a solution. Set up or hang the bike for maintenance. Take the wheel off and check it closely. Rim, Spokes, Bearings, Tension. Round, Dish and any thing else. The list is long but we have Youtube so it is all possible for you to do this easy. What ever tools you need you can get. Bike shop costs are exsorbatant and ecconomical bike tools abount. Don't be afraid of Harbor Friehgt or cheap tools. You can get the good ones latter if you need them and will apreciate them much more latter on. Solving problems and working on your own bike is truely rewarding.

Or take it to a bike shop and hope you can afford to pay them to do it and after you pay them that they do... Do It!

Note: I have great sympathy for those Bike Shops and employees that are trying to keep thier head above water in a drowning pool. I have no sympathy for Bike Dealerships more intrested in financing than service.

noimagination

It's pretty obvious from his post that OP hasn't checked ANYTHING.

BlazingPedals

If the rotor rubs, it's either the rotor itself or the hub. The hub could have loose bearings or a bent/broken axle. Most commonly, especially with low-end mechanical disc brakes, the rotor becomes out-of-true due to hard braking. It can be trued with your thumbs, but there is a tool that makes things easier.

Now if your RIM has a wobble, that is a separate issue and should also be dealt with.

KerryIrons

In a related request, my bike isn't working right. Please tell me what's wrong and how to fix it.

Siu Blue Wind

Some people come on here to learn or for help. Some are scared to mess with their bike for fear of messing something up. So...they ask here.

Siu Blue Wind

Thanks for trying to make people feel crappy.

Siu Blue Wind

This is a world wide site where people from all over the world are welcome. Have you considered that there may be language barriers? Or internet translation issues?

And if not, remember,not everyone is as perfect as you.

shelbyfv

Well heck, just trying to add some humor, salvage an unimaginative troll thread. I'll delete.