drexappeal

29 is kinda low. How much is the max pressure on the tire? If it is 50, I'd up the pressure by 6 psi minimum.

johnand

28 front and 32 rear is the recommended MB pressures. I am running those pressures with even tire wear across the tires.

As far as the outside edge of the right tire only wearing on Trisonics car, that clearly points to an alignment issue if your air pressures have been consistent side to side. Sounds like the right side has more positive camber then it should.

c230 o5

so far with my pss9 and camber kit i have no problem with camber

drexappeal

Yeah, but if you look at the max pressure of the tire it indicates 50. There are lots of financial reasons that MB would recommend such low tire pressure. If there is wear on the outside of the tire, hat means that the tire is running soft. If you take an innertube floaty that is used in the pool and you blow it up and it's under inflated, when you roll the floatation device on the ground, you'll notice that the outside edges spread more. It may provide better traction, but will cause the outside edges to wear faster.

trisonics

In that case the wear should be seen on both front tires and not just the right side one. Both have the same pressure.

drexappeal

What year /model do you have? And what size rims and tires? Update your profile, cuz depending on which you have, the answers may be different.

trisonics

Its a 2002 C230K coupe with 17 inch wheels and Bridgestone pilot Z rated tyres. The front tyres should have no more 10000 miles as they were changed last year but you can see the wear in the pic I posted couple of posts above. The wheel you see is actually right side wheel and I swapped it with the left. The car was involved in a fender bender two years back but I don't know which side it got hit and to what extent the damage was but the mechanic said that everything looks good, including alignment.

johnand

I agree with you that since the whole Ford and Firestone debacle, tire and auto manufacturers have been really careful about pressures and such. The 28 and 32 that MB recommends is with a standard load (meaning, 1-2 adults, no luggage). They spec +4 psi for carrying a load and/or driving in excess of 100mph. Regardless, the correct tire pressures are dependent on so many variables, that each person needs to determine what is right for their situation. But, the OEM spec is always a good starting point and works most of the time w/ OEM tires. I sure since Trisonics car is an 02, he is running non-OEM tires, so he may need to tweak pressures from the OEM specs.

That is correct. I believe Drex thought your wear was the inside AND outside ribs, not just the outside.

Ok, now we are getting somewhere. Accidents even minor almost always cause tire wear problems, as it is really difficult to get everything back to the way the car was before the accident. I would get a second opinion from a good alignment shop, or better yet, another MB dealer. Ask for a printout of the alignment. If you post the results of your alignment, I can help you decipher it. I used to be a frame/alignment tech and have extensive knowledge in suspension design and setup of track cars, so I know what I am talking about.

Bottom line is, this is not an air pressure issue, it is a suspension/alignment issue.

trisonics

Thanks Johnand. I will take it to a dealer and get an opinion.

drexappeal

John, you are very knowledgable and were absolutely correct about what I had initially thought.