Hi Joey,
Just because we get new tires does not mean they are not going to vibrate. Especially, if they are not balanced properly. If you bought these tires from a tire store and they balanced them for you I would take them back and have them do what is called a road force balance. This will balance them while putting a load on them simulating you driving down the road. Each tire manufacture releases their idle road force so we can compare what they measure to that and see if the tire is no good.
If it vibrated above 65 and all you changed is the tires and it got worse, then this is where you need to start. It is also possible that one of the wheels is out of round and they may have put that one on the front and it is more prevalent now. Also, does the steering wheel shake or do you feel it in the seat more? If felt in the steering wheel this is the front tires, if in the seat it is the back.
Next we need to inspect the driveshaft and u joints. Normally a drive shaft is felt almost all the time but we need to check it to make sure it is okay.
https://www.2carpros.com/articles/how-u-joints-work
The best way to diagnose these is if you have a vibration analyzer. I have never met a non mechanic (most mechanics don't have one) that has had one of these so I doubt you do or have access to one but I need to mention it. If you know people that might have one, it is well worth asking. This will measure the vibration in hertz and give you a number. With that number, the RPM, and speed you felt it at, we could tell you pretty much what this is.
Without that tool, we need to go about it by process of elimination. Let me know what you find with this stuff and we can go from there. Thanks
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Friday, May 3rd, 2019 AT 7:06 PM
