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Unread 03-09-2010, 05:04 PM   #1
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Default Tires Wobble Past 50MPH

Problem: At around 50MPH, my tires start to wobble, I think it's the front. As speed increases, wobbling increases.



Now, I swapped my studded tires for these today. I bought them from a junk yard. They are 185/65/14. My car calls for 175/65/14. I have them at 36PSI. Sidewall says 36PSI for the federals on the back, 44PSI on the front. I set them all to 36PSI, for the time being. The Glove box says 32PSI I think. These tires have plenty of tread. Abe's top hair can't be seen.

I'm guessing I need them balanced. I'm pretty sure it's the front end, but I may as well do them all. Input?
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Unread 03-09-2010, 05:10 PM   #2
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Tire balance, or bad tires.

Jack up the front and spin them, the tread should spin true and not dip or wobble.

Switch them to the rear and see if the problem follows or goes away.
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Unread 03-09-2010, 05:11 PM   #3
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Quote:
Originally Posted by Mr Car Guy View Post
Tire balance, or bad tires.

Jack up the front and spin them, the tread should spin true and not dip or wobble.

Switch them to the rear and see if the problem follows or goes away.
Sounds like fun.
I have a floor jack, and 4-way. I'm going to wally for $18 to balance them.
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Unread 03-09-2010, 05:32 PM   #4
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Could be a bulge in the tire. The faster you go, the frequency of the bulge hitting the road is greater. Too low of frequency and you won't notice it, too high and it'll feel smooth. If it were a bulge, it's very possible you not feel it under 50 and not feel it over a certain speed, let's say 80.
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Unread 03-09-2010, 05:55 PM   #5
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Sounds like unbalanced to me

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Unread 03-09-2010, 06:31 PM   #6
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Balanced them, and now wobbling starts at 75MPH. I imagine that's the limitation of the Corolla, though.
My old 940 Turbo wound top out at 120, and not wobble. Need a Volvo.......
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Unread 03-09-2010, 07:34 PM   #7
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You need to stop buying junkyard tires, dude. They're a safety hazard, I'd never even consider putting a set on anything I drive. I might even refuse to ride in a vehicle with them.
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Unread 03-09-2010, 07:48 PM   #8
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Is this on the Corolla? Could possibly be and inner or out tie rod on the rack. Possibly a worn bearing.
You could always put it up on jack stands and have a friend put it in drive. Let the tire rotate a little.... see if you have an out of round tire. Once you are done with the tire rotation.... sit my the side of the tire. Make sure the steering locked and in park. Grab at the top and bottom of the tire. Rock the tire. See if theres any play in the ball joint. then grab the sides of the tire. Put some force on it. try turning it in and out.... Is there lots of play? Go do the other side. Are they about the same?
Go under the car. Find the outer tie rod end. Most mount from the bottom up. Take the palm of your hand. and push up on that tie rod. Any Play? DO the other side as well. If you wanna be safe. Pull the tire off. Grab the Hub is there alot of play in there? If so, the bearing might be worn.

IS there any other info you have about the car? Noises Clunks when it turns. Pedal pulses when you brake anything.

Edit. as an addition. Cull is right. They are junk tires that have possibly been in an accident. Could be a broken steel belt. From an impact.
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Unread 03-09-2010, 11:36 PM   #9
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Quote:
Originally Posted by TestECull View Post
You need to stop buying junkyard tires, dude. They're a safety hazard, I'd never even consider putting a set on anything I drive. I might even refuse to ride in a vehicle with them.
The trick is inspecting the tires.
They were perfectly fine. Our junkyard guys do a good job diciding what's trash and what's not.

Besides, this thing is up for sale. I'm not buying brand new tires.
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Unread 03-10-2010, 06:40 AM   #10
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LOLWUT?

I shelled out $400 some odd for a whole new set of Falken's, mounted and balanced with new valve stems. They've served me very well for the past, shoot... 4-5 months? And the way they're wearing, I have maybe another 3-4 months on them. $450-ish every year is not bad at all for new tires.

Before you start snapping at me for apparently not buying junkyard tires. I lived my entire life running off junkyard tires. Average lifespan of those were 4-5 months. MAYBE, I'd get 6 months off them. I'd end up with bubbles in the tires, sometimes the tread fell off the radial. Other times, they'd just spring leaks. I had once instance where a tire blew up on my mom. Thankfully, she was raised on a farm, so she knows how to handle herself with a blown tire.

I hated running off junkyard tires for as long as I could remember. Once, I could afford buying bigger and better things, I aimed to buy new tires from Discount Tire. What did I end up with? Four brand new Falken's that have proven themselves to be well worth my money. They stop, turn, and even slip, when I want them to; exactly when I want them to.

I know I can't sway your opinion, you've shown us that during your time on OCN, so I'll just give you my input and leave it at that.
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