I want to put 30” tires with matched size all the way around on my X LV. The System 3 SB-4 wheels are available in the 6-1 which is the factory offset on the front which I need to maintain to fit in my toy hauler. What are people doing between 14” and 15”? Stock is 15” but I would assume softer sidewalls on the 14”. I am doing the Shock Therapy springs and shock update to smooth it out so might not need softer sidewalks. Thoughts?