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richiebklyn
New User
Apr 29, 2017, 12:09 AM
Post #1 of 2
(1735 views)
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annoying vibration
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Hi guys, I am hoping someone with experience can tell me what to do next. I developed a bulge/bubble on my front passenger tire about a month ago. I have a 2015 mercedes benz cla, 21k miles, I do not have run flats. I bought 2 new front tires (Nankang NS-20 Performance Radial Tire - 225/40R18 92H) and had them replaced and balanced at pep boys. My original tires were pirrelli, same size, and the 2 originals are sill on the back of the car.
After installing the new tires on the front, The tire tech told me I have a small bend in my rim and that may have caused the tire bulge. I could see how this might have happened, because I hit a small pole laying across the road a few months back, but never had any vibrations.
After having the new tires installed, I took the car on the highway a few days later and noticed a vibration at high speeds, 60 mph +. The steering wheel gas pedal and even inside door and seat vibrate. I can feel the vibration in the steering wheel only at lower speeds 35 mph, only if I squeeze the wheel tight.
I took the car in to have the bent rim fixed, but a week later I still had the vibrations. I went back to pep boys and they explained I had a small bend in the drivers side rim as well. They also explained that the tires needed to be rebalanced. They insisted that when I had the rim fixed it was not rebalanced. So I balanced all 4 this time and had a full alignment.
Considering I still had the vibration I had the drivers side rim fixed the following week, as well. At this time I still have the vibration in all areas I mentioned.
Should I go back to pep boys or maybe my regular car mechanic to see if it is not related to tires and rims. Should I go to mercedes if it is not the tires? Please let me know what else should be checked. Considering I never noticed the vibration before the new tires, can one of the new tires be bad? I would expect pep boys to tell me that though. Thank you for your time.
Rich
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Apr 29, 2017, 1:55 AM
Post #2 of 2
(1722 views)
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Re: annoying vibration
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Quoting you Rich ">After installing the new tires on the front, The tire tech told me I have a small bend in my rim and that may have caused the tire bulge. I could see how this might have happened, because I hit a small pole laying across the road a few months back, but never had any vibrations<"
Roads happen as we know tires and wheels take the first hit of course. With a bent rim seen apparently probably the first problem then the tire even with just 21K on tires drove some miles with the bent rim which could wear the new tire into that flaw some. You or they chose a different brand so both new and brand change the wheels are not longer equal which this car may not tolerate.
The alignment is effected by so much as tire pressure never mind different brand and new probably needs redoing when this is figured out but I suspect combo of rim really isn't fixed and new tire already wore some into that and might be hard to see.
Mistake IMO - changing brands on an MB and other vehicles that generally fussy and complex as well. Not rebalancing yet another on top of that when rim was supposedly fixed.
For the shake/vibration alone: I might put front tires on back to see if the problem changes or stays identical if just to see and VERY carefully check that new tire having been used on a bad rim for IDK how many miles.
The dealer will probably suggest all new matching proper tires and really fix or replace the rim and end it.
Lots matter if you are not or were not exact with tire rotation as it's near impossible for them to wear evenly if you neglect that so have a mixed match of tires this vehicle isn't going to tolerate.
IDK easily what the rating are for these new tires more than just matching size there should be listed how for they travel per one rotation new plus the 3 rating marked on them, Treadwear rating number, temperature and traction expressed as A,B, + C I don't see as that suggest below standards.
It's quite possible at 21K your original tires were only rated to last (it's a # to compare expectation not precise miles) perhaps only 20-30K? I find lower treadlife expectancy more common on a performance tire - rubber can have a better grip on road surface if lower.
I know - it seems newer and lower miles but would expect the Dealer suggestion to be put the right brand called for back all new, rim known fixed or a new one and yet another alignment,
T
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