How to pour tubeless sealant without removable core valves
Pulling the tire from the rim is the easiest way.

If you want to avoid spilling any sealant, have a friend or stand hold the wheel off the ground so the tire can keep its shape.



I've seen people use a needle &amp; syringe on the internet somewhere, but that doesn't strike me as the best idea. I like my tires sans holes to start with.