Thanks vik, Geroge Paul and FF for the feedback.

vik - Why the Big Apples and which one? According to the Dahon specs, the tires on the Speed D7 is 20 x 1.75. Shouldn't I be looking for a 20 x 1.75 tire?

While we're on tires, what about tubes? Is there one that would also provide more puncture prevention or should I just put slime in them for that? Again, I'm assuming I pick a tube size based on the tire. Would that be 20 x 1.50 since they go inside the tire then?

GeorgePaul - Again, thanks for the feedback on this and on another other thread you've thoughtfully responded too.

Folderfanatic - Thanks for the thorough response. Bike mirrors seem to work for me it seems. It saves me a whole lot of neck twisting but they definitely do not replace the neck twisting I automatically do before I cross the street or intersection.