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Wheels, Tires, Suspension & Brakes ForumDiscuss wheels, tires, suspension and brakes for your Mercedes-Benz.
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I have a new to me 2019 S Coupe with 19" Michelin all season tires. I suspect they are run flats. Is there a better option to improve the ride quality? Here in NY, the pot holes are the size of fox holes and even without pot holes, the ride is a little stiff. If I got rid of the run flats, what is the best strategy regarding a spare, spare kit etc? Thanks.
Your first job is to see if you do have runflats. If you do, then you need to decide if you will replace them with All season regular tires in the same 19 in size. My friend did that with his S560 and loves the difference. . My E53 came with 20 in runflat Pirelli summer tires. I bought a 19 in winter tire package from Tire Rack. It rides better for sure. An 18 inch would be even more smooth. For the winter tires that are not RFs I bought a neat little compressor/ sealant package from Griots Garage. The sealant isTPMS safe . It is in a compact little carry case. If I get a sidewall blowout I am screwed. I dont really want to be in rural Vermont on a trip looking for tire to fit my car. Alternatively you can by a really neat little spare from Modernspare.com, that might fir in your trunk. I may do that for longer trips in my wife’s GLC, not sure if I would bother with my care. I have to measure as it would be really nice if hers and mine were close enough in diameter to use for either one.
The very first step would be to check your tire pressure. It's likely too high. Inside of the fuel door you should see at least two recommended tire pressures. Normal load and maximum load. You wanna use the normal load one. That's for normal driving load scenarios with 2-3 passengers and no heavy cargo. Maximum load is for when the car is loaded to its gross weight. In the USA, the door sticker only lists the maximum load pressure, so most people drive around with their tire pressure set too high and have to put up with decreased ride quality. After that as said above, the tire sidewall will tell you what you have, and if you still don't like it after adjusting the tire pressure, then look at grand touring tires for increased comfort. Anything performance will have reduced comfort. All-season and non-RF generally give a better ride.
Word of caution, though. Lowering the tire pressure may increase your risk of damaging the wheels and tires driving through potholes. Low profile tires are not really meant for that, so you want to try to avoid potholes in general. RF tires have stiffer sidewalls, so that gives some more protection, but again at the expense of ride comfort. The softer the tire, the more likely you gonna bend a wheel. Can't have your cake and eat it, too.
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