I've had a scooter (Kinetic Honda) for the last 15 years. I have observed that whenever a tire (tube to be precise) is punctured it's almost always the rear wheel. A typical reason for a puncture is nails. I'd expect that the front wheel crosses a nail before rear wheel and hence it should get punctured more often than rear wheel, but my experience shows otherwise. Can anyone suggest the possible reason for this?
There are scientific explanations for this. The long and short of it is that the rear tire bears the most weight just the same as a bicycle. ( Brian, if you weren't in OH I'd say let's go for a ride so that I can witness your phenomenon )
While I don't think there can be a specific answer (it may be due to your bad luck, or whatever), it may come down to the fact there is more weight on the back tire than on the front. The front tire can more easily overcome a puncturing obstacle such a nail or a screw, which the back tire picks up. It may also be that the front tire kicks up the obstacle and is subsequently picked up by the back tire. This is all conjecture as I don't think you'll get a "scientific" reason for this.