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Tire width

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Dutchman82

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Came home with a 2020 Cummins 2500 last night. I always went tall and skinny on my Jeep and Landcruisers. This being a heavy diesel, will I run into any sway if I want to maintain a smaller footprint? Say 285/75R17? Would a 315 or 12.5” offer any better stability? I don’t tow, and this is a daily and will get driven in all environments. I am more concerned with economy at this point, this is the wife’s driver and she already has a hard time getting the kiddo into the car seat. Thanks for the input.
 

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The skinnier tire is definitely going to be more efficient on the road (vs the same tire but wider). A 285 is already over 11” wide, so I don’t think you need to worry about any stability issues with that. It’s not like you’re putting 50s on there with a 16” sidewall.
 
I appreciate the input. I don’t know if We really drive fast enough or tow enough to notice. Figured it was still worth asking before I get rid of these horrible transforce tires.
 
On my Jeeps I have run 255/80-17 (33x10.5) 285/75-17 and 35x12.5-17 and never really noticed any difference. I just put on some Toyo RT in 35x12.5-17 on my 2020 power wagon and they feel exactly the same as the stock 285/70-17 as far as going down the highway. I almost went Toyo MT in 285/75-17 but changed my mind at the last minute. I think narrower tires generally do not follow highway grooves as bad as wider ones. The Toyo 35x12.5-17 are not all that wide so if you want a little extra height go that way. If I were running 18" wheels I for sure would have went with 285/75-18 toyos. best of both worlds.
 
I like 285/75's, fit on a stock rim and almost 35"s tall. You may lose a mile or two mpg but they are nice and even better with a 1 3/4 or 2" level. I never noticed any added sway when I ran them on my past trucks.
 
Good to know. I like the smaller contact patch for the mileage. I have no idea what to expect yet. I’m stock everything except for some hot shot’s secrets ever day diesel treatment. I figure I might as well start off right (first tank fo fuel) have 50 miles on it so far.
 
Honestly I don’t think you’d see much of a mileage difference with the diesel. Honey badger don’t give a ...
 
I went 285s(35" tall) to have a little more weight on the contact patch in snow n ice. I didn't notice any changes in road handling and I corner aggressively. No noticed effects while towing around 7k#s.20200521_112005.jpg
 
Thanks for the picture. Nice looking setup. I don’t mean to turn this into a whole different topic but what offset are those fuel rims and do you like them?
 
Dumb question but what is the 4.5 Ram all about? I have a 2nd gen but all I know is this truck is new.
 
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