This calculator presents theoretically compatible tire sizes within 3% of your original tire diameter. This lookup tool shows alternatives across different treadwidths while maintaining proper overall diameter for accurate speedometer readings.
Please note that these are theoretical tire size fitments and are not a recommendation. Additionally, having a size listed here does not mean a tire exists that is made in that size or that your desired tire will be made in that size. This is definitely a struggle when attempting to fit ideal sized tires to a specific model of high-performance rubber.