I am no expert by any stretch, but 95LSC 2FAST4U sounds very well informed and logical. I read somewhere that the rim should be no less wide than 80% of the tire width and 7" is 79% of 225mm if you do the math (7inches = 177.8mm). Anything less and you will begin to experience performance issues such as squiggly or noodly sidewalls especially in cornering. I have read about these complaints on 1010 tires websites as well as other tire review sites and when they provide the details of their problem it is almost always a case of tires too wide for the rim. The stock rims for the Mark are borderline for 225 tires at 79%, if you wish to have wider tires consider wider rims too. Just a humble opinion.