Increasing the wall aspect of the tyre can be devastating if you don't fully understand the effects of what you are doing! The circumference of the factory tyre was calculated with more than comfort in mind, the wheel sits in an arch attached to the chassis by the arms and suspension - If you increase the circumference of the tyre you increase the chance of rubbing or damaging the tyre/car under the travel limits of the suspension.
Before buying your tyres use a tyre size calculator to compare factory tyre to desired sizes for example a 295-50-20 tyre is around 7cm taller meaning 3.5cm closer to the arch at all times, this may cause an impact inside the arch under heavy braking on a corner. When you use this type of diameter increase it will also mean youre going to be doing 65mph when the speedo says 60 How friendly are your police?
If you change the tyre width to match the wall profile at 50 you would need a 235 width
which may be acceptable for Winter conditions but could be frowned upon by car insurance companies if the manufacturer specified 265 or 275 widths, as 235 is classed as degrading the cars braking ability.
I believe in Iceland/Nordic countries some have fitted very large tyres but they also lifted the body to match - Not the look you probably want.
295-40-20 or 275-45/40-20 check prices and rotate front to rear half way through to get even wear otherwise the Diffs can get strained, generally you should replace all 4 tyres at the same time.
the stock tire diameter is 29".. You can easily go to 31" diameter before needing to think of lifting. I believe around 32" you definitely have to raise things a bit. I am running 30.7" and I LOVE them. The extra sidewall makes things much more comfortable. I went with a high speed rated tire so that it would reduce sidewall flex. The ML has huge wheel wells and can definitely accommodate taller tires without difficulty.
Still, I would not add ANY unsprung weight to my ML if it had a v6.
Why do so many people with ml320's focus on putting big (slow) wheels on? Its like a disproportionate amount of people here with bigger wheels are running 20's+ with a 6 cylinder engine..
BenzWorld.org forum is one of the largest Mercedes-Benz owner websites offering the most comprehensive collection of Mercedes-Benz information anywhere in the world. The site includes MB Forums, News, Galleries, Publications, Classifieds, Events and much more!