Mitsubishi Challenger

Assuming you had a wheel balance and alignment with the new tryres, a friend with 2000 model said he had a bit if a vibration. When he had new tyres fitted they recommended he have some offset inserts( something like that from memory) fitted somewhere in the steering. Think it cost him about $60 but he said it made a huge difference. I have a 2003 model and don't have any trouble, but have kept it (partly) in the memory bank in case I have the problem later.
I believe any of the tyre places will know what I mean.
The steering on mine is not as smooth as a late model sedan, but no vibration.
Ken D
Brisbane

2 grey nomads
This has nothing to do with your question but worth sharing .

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Doug

Have the wheels electronic or Static balanced.
I had a similar thing and had this done and that fixed the problem.

This balances both the inside and outside of the wheel and tyre.

After they do it check it against normal wheel balancing and you will be surprised.

2 Grey Nomads,

Do you have the vibration all the time when you drive or only when doing about 80kph and then will go away when you go faster or slower?

You could also have a uni problem or a tail shaft out or balance.

I would strongly recommend that you see a 4WD mechanic. Most of the big 4WD shops like TJM or ARB should be able to sort the problem for you.

If you can let the forum know where you are we might be able to recommend someone to give you a second opinion.

Wayne