First of all, I'm sorry that my product has brought you an unpleasant experience. Regarding the difference in tire sizes you mentioned, I have been communicating with you. There are some details, such as measurement methods and measurement environments, that I need to understand to ensure the accuracy of your measurement results. For example, did you perform the measurement at the correct air pressure of 475KPA, but I have not been able to get your reply. I hope you can continue to communicate with me and I will solve your problem as soon as possible. I also want to know if my product is working properly now. I want to apologize to you because I failed to provide you with a product that satisfied you sufficiently. I sincerely want to know if you have any specific claim requirements and I will work 100% to satisfy you. You are a very serious customer and your rigor has earned my respect. Looking forward to your reply and wish you a nice day