Just got a 2015 2500 mega cab with the 6.4 hemi. I've looked around the web and it looks like I could fit 35's on it with a level kit. I see they make various sizes 1.75 to 2.5. What does someone with a little experience with the new suspension think? Also I need to know backspacing for new rims. I want 35x12.5s without rub or trim.
I was also wondering if the megacab sits higher than the other models. I'm about an inch taller than my dads 2012 tradesman, and he has a level on front and blocks in the back. And I must be a couple inches higher than his 2014 longhorn 6.7. Maybe I just got a tall one.

 

look at what Carli Suspension has for the truck and ask them the wheel question, I have had very good experiences with their products and their knowledge. Daystar leveling kit will afford the smoothest ride but not sure what they have for a 2015.

 

not sure anyone really has anything for 2015's yet??
33 will's fit stock for sure
35's I gather will rub at full turn and if any bumps happen??
so just a leveling kit to bring up the front, I'd say the 1.75" will be close with 35's clearing in all situtations
on stock wheel spacing that is!

I also personally think, if your going to 35's, I HOPE you got the 4.10 gearing, as that is even on the high side for 35's IMO
4.88's would be my suggestion to stay stock, or slightly better! on 35's

 

2015 should be same suspension as 2014, highly doubt they made any changes there.

That is what Ive heard as well, 33's no issue, need a leveling kit for 35's.
4.10 should be more then enough gear for 35's with a 6.4L. 4.10 is plenty for 35's with the 5.7... cant go wrong with 4.56 or 4.88 gears though

 

UPDATE
I bought a coil spacer kit from Traxda it is 2.5" front and 1" rear, not many companies making a rear coil spacer for 3/4 tons yet, and I went with Moto Metal MO961 20x9 +18 wheels and Toyo mt's 35x12.50's. This truck is huge now. It sits about 4" taller than my dads 2012 3/4 ton and he has 2.5 front 2" rear on 34's. The tires look a little small on it, and stick out from the fender about 1.5 inches, definitely need flares now. Hope this helps the next guy. I will post a pic soon, the wheels are sweet with the red inserts.