Originally Posted by Thomas15

I have two bikes that I ride on rail trails. One is a TREK 4500 mountain/Hybrid with 1.75" Panaracer street tires the other is a mid 80s Asian steel road bike with 700x28 road tires (Conti Gatorskins). Some sections of the trails I use are a bit difficult for the 28s but the 1.75s are more than enough. I ride about 300 miles of rail trail per month, my typical ride is 40-50 miles long. In my opinion just ride your Schwinn the way it is until the wheels fall off. At that point you will know exactly what you will want to replace it with.