Using a car tire with a larger diameter but the same weight can have several implications. While weight is one factor, you also need to consider other aspects such as clearance, speedometer accuracy, and handling characteristics. A larger tire may affect the accuracy of your speedometer, alter the gear ratios, and potentially cause clearance issues, especially if the tire rubs against the fenders or other components.
It's generally recommended to stick to the manufacturer's recommended tire size for your vehicle to ensure optimal performance, safety, and handling. If you're considering changing tire sizes, it's advisable to consult with a professional mechanic or refer to your vehicle's manual for guidance on acceptable tire sizes.