No I meant the Duratracs. You mentioned running them year round and that they were great in the snow... and then said you were buying some different winter tires so I was curious why you weren't running the Duratracs for the winter. Yeah I have some Conti's now that I need to replace asap. I am up in the air between sticking with my OEM 20s or getting some 18' Compos. Wondering if the 18"s will be a less squirrelly ride than the 20s. Bouncing all over the place.
Oh sorry for the confusion. The Duratracs are the tires I run year around on my Jeep Wrangler.
For my 2015 LR4 I'm waiting to take delivery of, I'm going with the Yoko's for winter. I'm doing that because the stock conti's on my current 2012 LR4 performed horribly in the snow and I don't want to go through that again.
If you drive in poor conditions often during the winter, I would strongly urge you to get some tires that are better suited for the task. The stock conti's are well known to be poor performers on anything but warm dry roads. After 3 years experience with them, I have yet to wrap my head around why Land Rover chose to equip them on a vehicle touted for it's all terrain abilities. It surely came down to a money issue, no way it won any performance comparison.
As for size, it really all comes down to the sidewall. The bigger sidewall, the smoother ride to put it very basically. So yes, you will likely enjoy the ride of the 18's more than your 20's if the 18's have a taller sidewall. If not, you won't notice much difference.