NICE bike! But dude, seriously- buy a set of tires, and tell your wife that that's the way it's going to be. There will be some friction at first, since you let her get out-of-hand and wear the pants- but believe me- it needs to be done. Grow a pair, and do it; or live the rest of your life like a sniveling little boy who lives with his mommy, as opposed to a husband. Believe me, if you DON'T re-assume your post as man, your marriage will be in trouble anyway; and you will be miserable- so do something while there may still be time, because you really have nothing to lose. (Not that re-asserting your position is guaranteed to work either, but the thing is, it's the only chance you have, because under the present scenario, things will only go south anyway- and THAT is guaranteed)