You can run 35"s as has been stated. But, that comes with some considerations...especially wear on components as
@atnolan94 alluded to above. I considered 35"s for a while. But then I realized that availability for spares when in more remote locations becomes a concern. I wanted to stick with a size that was widely available and wouldn't leave me stranded (happened to a cruiser in my HIH group last year who had an "odd" tire size that was not available from any tire vendor anywhere in SW CO....he had to buy an entire 4 tire set in a different size.....had to run in "limp" mode on a mismatched spare all the way to Grand Junction from Telluride to get them). The other thing for me is that I wanted a matching combo on my trailer (allows for additional emergency spares if needed). Worst case scenario (tear the sidewall on one of my main tires AND the truck spare), I could scavenge an exact match from my trailer so that I could safely get to an area where I could procure a replacement tire to then get the trailer back up and running. It means I'm running upwards of 3 additional spares when towing in the mountains on trails (along with a tire repair kit). It's a very specific concern that not a ton of people have. In the end, 275/70/18 was the best fit for my needs. That size has a WIDE selection available and can be easily found in a pinch almost anywhere (even if the brand might be different than my KO2). Ubiquity and redundancy have their advantages when adventuring. If I had 16"s, I'd get a similar "common" size (295/75/16) so that availability is pretty wide even in remote areas. 33" have provided me plenty of ground clearance (never once felt I couldn't do something because of the 33" size) and less wear on drivetrain components (lower overall maintenance costs) than the taller and much heavier 35"s would have. 35"s look awesome for sure! For me though, I have specific use requirements that necessitate me staying on my current setup.