Originally Posted by
elcruxio
Technically you shouldn't need a compressor. If the tire and rim interface is ok, a track pump should be more than enough to seat the tire.
Some wider tires, such as 38 to 50mm for instance, can be an issue on wider internal rims width. I had issues mounting some 40's on a 25mm internal rim width, and had to use a compressor to get them to fully seat.