New tire balance question

[loneryder]

Shaking in the seat or floor that begins around 68 mph, especially if the shaking seems to move around the car, is a CLASSIC sign of out of round tires or tire that need to be road force balanced.
A few other thing can cause that issue too, such as a damaged tire or a loose belt, but in general, tire related.
MB 4matic drive trains also have a rubber flex disc near the rear axle, so you'll need to inspect that too. They can go bad after years of use.
How many miles on your MB?

If I were to guess, just a guess, you got a great deal on those tires because they were seconds or somehow not up to standards.
I put Pirelli MOE tire on my 4matic, and the tire shop road force balances everything they sell, the result, smooth as glass at any speed.

70k on it. It wasn't a special deal just $100 rebate from Pirelli. Thanks for the info. I'll get them checked for out of round.

 

[CapriRacer]

Go to Hunter Engineering 's web site. Look for balance machines in your area. All of Hunter 's balance machines are RoadForce machines and can deal with out of round.

 

[SumGuy]

What I've found in my area (SW-Ontario) is very few independent or chain garages have road-force balancers, but many or all car dealerships have them.

 

[JohnnyG]

70k on it. It wasn't a special deal just $100 rebate from Pirelli. Thanks for the info. I'll get them checked for out of round.

Yes, I got that deal too, but still put out $1500.00 for 4 tires! RFB included though, so I was ok with it.

 

[Eddie Hudson]

West Farms, across the street from McDonalds. Big car wash over there. Forgot the name of the place. It's like 180th St & West Farms Road. Huge intersection where you get on/ off the highway @ 177th St. Now I forgot the name of the highway. It runs into the Bruckner Expressway. Bodega on the corner. Beer distributor up the block from the car wash. Bueno place !! I call the boss " El Hefe" LOL . I grew up in Morris Park. Stayed there until 2007, then move to Yonkers, then move to Yorktown Heights for the school system for our daughter. Too expensive here. Gonna move when she graduate High School. Just scraping by now ....

I haven't been over there in over 35 years. I had a few buddies who lived in Morris Park but they got married and moved away. One of them either owned or worked at the "Bronx Speed Shop".

 

[dan_erickson]

Unfortunately I have the same tires on 2022 Acura MDX that discount tire installed about a year ago and have the same shaking issues. Discount has balanced them multiple times, road forced them, ect with no fix. They are now blaming my issue on my MDX and that I need to take it in to a dealer mechanic. I should have just went with the Michelin tires as they are the same money.