My Cessna 150 uses 6.00-6 tires for the mains. I'd like to go up one size to 7.00-6. About 1.25" larger diameter than the 6's. The other dimensions for rim and width are the same. A bit more weight capability for the 7's. Thinking the extra size will provide more cushioning for landing on grass and gravel. Will also replace my rotors and pads in the process. My IA is fine with it and says he sees them used all the time. I'm still wondering if this will come back to haunt me later. Do I need to do a 337 as a minor alternation or get way deeper? Asked Cessna for comments but have not heard back as yet. Any thoughts?