I would like to say that my BST's had the following warning / disclaimer logo on the box when I received and opened them (spelling of tire changed to aid search function) " Instructions on use of Tire Warmers on BST Wheels Ensure that the warmers and regulators are operating correctly. DO NOT use enclosed tire warmers (side covers that blanket the entire wheel) BST wheels are designed to operate up to 100 degrees Celsius (212 in freedom degrees). "