richzajic

Is this tire ok to run on the ML350 ??

I got a good deal on some OEM 19" rims with brand new Scorpion tires.

Thanks for any usefull info.

entre

4 Qty. 255/50ZR-19 CONTINENTAL CROSSCONTACT UHP MERCEDES

This is the correct size for this vehicle

The total diameter is exactly 29" same as oem

http://www.peachparts.com//Wikka/TireCalc

these were from tirerack last week

entre

255/50ZR19
103W Mercedes420 AA A1929 lbs.
51 psi

33 lbs.7-9"
8"
10.4"
NA
29.1"
712
CZ

richzajic

Thanks for the fast reply.

But. will the tires I bought be OK to Run ??

entre

Put them on and see if they rub.
The TPM (tire pressure monitoring system) is in the axle and probably cannot be set for that much over 29" total diameter. 3% or more is off. So you may get an error on those sensors. If it can be ignored, and I do not know that, then at least the vehicle will be traveling faster and more miles than indicated. 30.9" instead of 29 inches for 6.4% difference. 721 revolutions per mile on the 275 versus 712 revolutions per mile on the standard 255-50-ZR19.

entre

This from PeachPartsWiki:
http://www.peachparts.com//Wikka/TireCalc

The 6.5% difference is calculated as (30.9-29.0) / 29 = .065

Tire Size Calculator

This tool is provided to assist you in evaluating alternative tire sizes for your vehicle. Simply insert the stock tire size recommended by the vehicle manufacturer in the left column and the alternate size you are considering into the right column. Click "Compute" to see the overall tire diameters and the percent difference between the two.

Note - To avoid potential problems with ABS and traction control (ASR, ESP) you should always maintain overall tire diameter within plus or minus 3% of stock. This tool only addresses the issue of tire height. IT DOES NOT address the issue of tire width or any interference with the inner fender.



To answer your exact question about being OK, I just do not personally know.

richzajic

Thanks for the great info.
I may just breakdown and get the right size, if anything to stay away from any warrenty issue's if they may come up.

entre

Buy the right ones.
eBay the 275's
They will bring "market".
That is all they are worth and it is by definition "Good Money".
or....
drive for 2 or 3 /32 and throw them away at a dealer service interval.
just a thought.

vinceching

those tires will fit and you can use them. they are the stock tire size for the gl's 19" wheels.

the only problem you are going to run into is, you are going to have the tire rubbing on the inside rubber tire well.

i can try to get pictures if you'd like.

richzajic

Pics would be great

Thanks

entre

===========================================

Respectfully, stock tire sizes do not rub.

This is a current picture of the wheel and tire sizing taken from a 2009 ML-550 still using 255-50-R19.




[IMG]file:///C:/DOCUME%7E1/Pam/LOCALS%7E1/Temp/moz-screenshot.png[/IMG]

vinceching

the op's original question was about running 275/55/19 which is not the stock tire size on the ml. rubbing will occur with 275's as i ran them on my ml.

entre

The original point is whether the 275s can run on the ML body style.

My point is that just because the 275s are original on a GL model is not relevant as the GL is a much larger vehicle with a larger wheel well cavity than the ML series. What is relevant though is that you had used the 275s on the ML and it does work but rubs.

Good and thanks, but what does it have to do with these tires being original on some other vehicle, it just confuses the other part of the valid experience.

New point for would be users: How much, if any noticeable, was there a loss in Miles Per Gallon with the two size larger diameter tires?

roadrutz

Many of these tire questions would be self-answering if more people understood what the numbers mean rather than relying totally on sites like PeachParts to perform mindless conversions for them.

A 255-55-19 tire is 255 mm wide at its widest point, it has a height of 55% of its width, and it fits a wheel whose diameter is 19 inches. (Don't ask me who came up with a nutty system that incorporates three different measures!) 1 mm is 0.04 inches. Every computer in the world has a simple calulator built in, so figuring out dimensions is simple. 255 mm is 255 x 0.04 = 10.2 inches. 275 mm is 275 x 0.04 = 11.0 inches. Thus the larger tire is 0.8 inches wider than the smaller one. If the wheel offset in both cases is the same (ie: neither wheel sticks out more or less than the other) then the tire is 0.4 inches wider on each side. It would have to be a very tight fit with the stock wheel/tire combo for less than half an inch of extra width to cause rubbing. All other things being equal, if there were rubbing with the larger tire, I would guess it is because the wheels have different offsets. If the larger wheel/tire has more offset, the tire may rub on the outside; if it has less offset (unlikely), the tire could rub on the inside.

But all other things are not equal. The larger tire is also taller. Overall diameter is (2 x 275 x 55% x 0.04) + 19 = 31.1 inches. The smaller tire's diameter is (2 x 255 x 50% x 0.04) + 19 = 29.2. So the fact that the bigger tire is both 2 inches taller and 0.8 inches wider makes it a poor choice. Rubbing would be a distinct possibility.

As a rule of thumb, any replacement tire should maintain the OEM diameter. If you go wider you should also go to a lower height. eg: Going from 255-55-19 to 275-50-19 would be OK; it would put more rubber on the road (through having a wider tire) without affecting your speedometer, odometer, or antilock brake sensors. Only if you go crazy and start looking at 40-series (40%) or 35-series tires will you run the risk of the tire being so wide that it rubs even with OEM overall diameter.

markpgizmo

I would think 275s would not rub.

How does the ML63 accommodate the 295/40/20 tire front and rear? Does the 20 inch AMG rim have a significantly different offset that allows this wide a tire?

ympalt

so final answer? no?
I just bought the same size tire and rims, 275-55-19.
Is there anything you can do so they will fit with out rubbing?
Like changing the offset, or maybe putting spacer blocks>

polifon

Please answere someon. Am also want changr OEM size to 275 55.