I have one set with tubes (in use for 6 years), but it has been correctly pointed out that this is not warranted by Cooper (which means nothing, see below). My dealer gave me road-hazard warranty and no if/ands/but regarding the use of tubes.
My next set will be tubeless on a set of original wheels that are in excellent shape.
"What is the warranty coverage on my tire? (from Cooper's website)
All authorized Cooper Tire dealers can determine warranty eligibility on Cooper tires. Cooper products are backed by a workmanship and materials warranty that our independent tire dealers administer on a regular basis. Any tire that is deemed to have an eligible adjustable condition as determined by one of our independent tire dealers shall be processed according to the terms of the Cooper Warranty Program. Our independent tire dealers make the determination on what qualifies as an eligible adjustable condition, and handle all warranty returns. Cooper Tire does not warranty road hazards. Please direct any warranty related questions to your Cooper dealer. To find a dealer near you, use the dealer locator on the Cooper Tire web site."
