The real trick to getting them to seat is a clean rim, no valve stem core, and a lot of air in your compressor. A lot of it is about how fast the air goes in. The right chuck and a half inch hose can make ALL the difference.
I have used soap forever. I recently got some tire lube. I just changed a tire on my own bike and the tire lube I bought made my rim corrode way more than soap and water. Beware!
supershaft screwed with this post 03-08-2013 at 11:45 AM