70 mph on 225/60-16 tires @ 758 revolutions per mile. ~14.8Hz if vibration is once per tire rotation.
I have a lot of older cars that sometimes ride perfect, sometimes I feel a lot of road. On my 93 300SD, I found a great deal on some original equipment wheels with brand new tires.
My issue is this - depending on the road surface I will feel like an unbalanced tire. What Is strange is that it seems to be very dependent upon the road surface, not just depending on being within a certain speed range. I could be going along at a certain speed, and one minute roll smooth, the next minute shaking the steering wheel and floorboard (slightly) enough to notice a difference.
Sometimes I wonder if losing has something to do with it, like it’s more likely to happen when decelerating or lightly loaded. I assume this would affect the position of the car a bit. But there’s nothing definite relative to a phenomena observed.
There are no obvious issues with any rubber bushings, but I can’t really tell if the shocks are OK. Is there a good way to determine if this is due to shocks or tire balance?
Road force balancing arbitrarily is $100, two bolstering shocks is $200, and I should probably do all corners, so $400. Would like to avoid throwing money at this stuff.