07-20-2014, 03:20 PM
Dodge Ram Forum Senior Member!
Join Date: Sep 2012
Location: Slidell, LA
Vehicle: 2012 RAM 2500
Trim Level: Laramie
Color: Mineral Grey
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I've run stock 17s vs 18s & I don't think there's a proper answer for this question anymore. I think there's too many generalities.
Side wall isn't everything. Tread & design matter more imo. I have 35" Toyo AT2s on my 18s & I think they are a crap, despite what everyone says. They aren't smooth on roads & provide a lot of feedback. If you need to get dirty a lot, I can see the need, but if you're all highway, look at the tire first & see what sizes are available.
I have michelin LTX M/S2 tires in the stock size & even w/ a 3" lift, they ride better than larger tires, despite the advice I've been given over 3 different forums, plus calls to carli, 8 lug & everyone else. They were all wrong.
I bet the LTX M/S2 in 275/65r20 will ride better in all conditions besides mud/offroad vs the Toyo AT2 as a whole. There's only an inch difference in height (34" vs 35" respectively).
I could go on & on, but there's a bias here & almost on any truck forum concerning ATs or mud tires or bust. I'd argue the heirarchy shold go like this:
1. Overall needs/type of tire
2. Weight of tire.
3. Rim size
Obviously, the usage matters more than anything & that dictates the tire needed. After that, the weight. My truck rides differently because these ATs are so heavy (something closer to 80 lbs I think since they are the AT2 Extremes) despite only increasing the rim size 1". The LTX tires on a 20" rim are only 52 lbs. Going up to a 20 will not add 30 lbs each.
I just think it's impossible to make a blanket statement without knowing the following:
2. Type of suspension (stock or aftermarket)
3. Needs of the tire/type of tire.
4. Tire weight.
Rim size could either severely effect the ride or minimally depending on the tire & other aspects.
I consider this preference & each instance is extremely specific to what the owner's needs are.