You mean like this . . . ?


I replaced my front wheel bolts with Hexlox Hexbolts because I prefer to carry one lock. They just so happen to cover the ends of the axles. Across three SS bikes, I've never had an axle stick out more than half an inch on either side, usually the rear axle. If your axles are sticking out far enough to cause concern, you might want to look at getting a shorter axle.