Steering Unstable At 80 km/h ( 50 mp/h ) HELP !!!

[Sindako]

Hello Again Guys .
I Have an E30 1990 .
I have an Alpina Rims On it 17"
The Rims Are Converted From 5 to 4 Bolts .
But My car Was Good until i found out that The Front Rims Are Not Rounded Well .
So I Took them to the Specialest and He Reconditioned My Rims to Be Back as Round As it should've Been .
But While I was Driving Tonight , I found out That When I Speed Up to 50 Miles . The Steering Becomes Unstable ( Vibrate ) it Vibrates Like Hell .
Do you Think A Wheel Balance Will Fix This Problem . Or Is it something else .

PS : The Rims Have Hubs In them To Match The Brake hub On Car .
also the Rim Fits Perfectly but After Modifing It . the Steering Viibrates Only After 50 MPH . I didn't Speed Up More Than 50 . But It's Like That After 50 . I've Reached 70 miles and The Vibration on steering Keeps Getting Worse .

Any Help will be Appreciated .

And I Haven't Did Any Wheel Balance Yet . Will it Solve My Problem ?

[bimmershark]

what do you mean by not wheel rounded? i assume you mean the tires and not the actual wheel or do you? a balance might help ..

if it didnt have this issue before swapping the alpina wheels on..then it could be one or all of these

-tires are bad
-wheels need balance
-the adaptors/hub ring is not right for the car or wheels and is not sitting together right..
thats where i would start

[Kyle Anderson]

And I Haven't Did Any Wheel Balance Yet . Will it Solve My Problem ?

Probably.

[owwwch]

not re drilled correctly

[Kyle Anderson]

not re drilled correctly

Read the post again. They balanced fine before he had them straightened. They haven't been balanced yet.