Front end tire wear - Sprinter 3500 EXT
There is a lot of info on this on other forums, but I didn't find much here.
I was experiencing heavy wear on the outside edges of my front tires. So much so, that I changed then out at 10K miles. Long story short is that the alignment specs provided my MB probably are not the best for my particular setup/application. Via others recommendations, I set my alignment camber at zero degrees , rather than the positive camber that MB recommends (I believe it's 1.0 - 1.5).
I also installed somo springs to help with handling. More info below...
If you are having outside edge wear issues, your alignment may be at fault. Note that I had mine checked 3 times (twice my the MB dealer) and all times it was 'in spec'. Unfortunately, the spec wasn't applicable to my situation.
FWIW, I run all of my tires at 61 psi.
Below is my post to the other forum (sprinter-source.com)
2012 interstate 3500 EXT Lounge
Thanks to this board,I believe my front tire wear problems are now fixed. An alignment to zero degrees camber seemed to do the trick. At 10K miles, I had bad enough wear on the outside edges that I bought new tires (Michelin LTX M/S2) to replace the Continental Contis.
I went to a local shop in San Jose, CA (Ross Truck and Equipment Repair 408.292.1464). I took with me a set of camber adjusting bolts from Upscale Automotive. The team at Ross really liked the functionality or the bolts. They said it made the job super-easy.
My pre-alignment figures were 1.5 degrees (drivers side) and 1.25 degrees (passenger). Post alignment was 0. I can't recall what the Toe was, but it was reset. I have since put about 1000 miles on tires (we are on a road trip). I'm getting even, consistent wear across the treads.
I should also note that I installed Sumo springs (front and rear) before my trip. They have made a big difference and I am quite pleased with them. In the past, I put adjustable Konis on the rear as well as a bigger sway bar (both from Upscale). They made a big difference, but the front end was still a bit soft. The front sumos seemed to fix that. The rears seemed to address rear end sag (I have the extended sprinter, 24+ feet). Overall, the ride is much more dampened over bumps, in high winds and taking off-ramps. I was going to go with Koni struts in the front, but couldn't get them installed in time for my trip. The sumos are super easy to put on; especially the front. About 5 minutes per side. The rear installation is easy also, however there is just more stuff in the way to deal with (ie, my generator and lower ground clearance).
Once again, thanks for everyone's input on the alignment specs.