After 12 years, one spoke on one of my Dayton chrome 60-spoke wire wheels has pierced the sealing material and made a lot of bubbles in the soapy water. I have searched Phoenix area listng in vain to find a shop out here that repairs them. If anyone knows of a Phoenix, Arizona area shop that does this work, please let me know. Since the rubber is also 12 years old, it is time to replace the tires in any event. Suggestions as to make? Kumho 185x80x15 looks like a popular choice for a tubeless tire and Discount Tire sells them for $79 each. Suggestions welcome on that as well. Guy at Discount Tire says that tubes should not be used in tubeless tires. Thoughts on that would also be appreciated. Last, if the tires are going to be dismounted in any event, I suppose I could try to reseal the leaky one myself. I understand that you strip an area 2-4" around the single leaky spoke nipple with a wire wheel and then use silicone generously and let it cure for a few days. What type or brand silicone (or other material) is best? Or, is this so inherently a fools errand that it make more sense to send the wheel back to Dayton Wheels and - last question - does the mere passage of time and moderate road use since 2002 suggest that, even if the other wheels are not leaking, they soon must start doing so and, therefore, should all be sent back for re-sealing? Thanks for all suggestions.