I just joined Xoutpost after stumbling upon it during a Google search. Thought I'd make my first post in regards to what I was searching for in the first place.

Just purchased a CPO 2008 X5 4.8i with the 20" wheels and performance tires. Obviously I'll be purchasing a winter setup later this year.

I'm planning a road trip to Montana in late September, early October. The total trip entails about 4,000 miles round trip, most of which are on the interstate. I'll likely encounter a few gravel roads, and a little snow is possible that time of year, although typically only in the higher elevations. The weather can typically range from the 50's to the 70's and beautiful that time of year.

Would you swap over to an 18" winter setup before the trip, or wait until after the trip? One of the best roads around is out there, and I'd love to drive it on the performance rubber. I just worry about the weather taking a turn for the worse, and being stuck on summer tires.

Thanks in advance for all opinions.