Beautiful day and I can't do tractor work because nobody in my area has 9.50 x 22 tubes for the front tires of my M4900. I believe the stem separated from the tube possibly due to the only local ag tire repair shop putting the wrong size tube in on a previous repair several months ago. This down time is bad when trying to work fields before winter sets in. I guess it's time to learn the secrets to DIY tire repairs for self reliance. Took the tire in only because the tire tools at TSC are pretty expensive. Are there any recommendations for online suppliers of tractor tire inner tubes? Thanks