Abstract: This disclosure describes apparatuses and methods for measuring and/or comparing measurements of tires. Particular embodiments provide a tire measurement apparatus, comprising: at least one tire contact member configured to engage an outer diameter of a tire along a tread of the tire, at least one of the contact members being movable; and, a tire measurement or size indicator configured to indicate a size or graduation measured by the at least two tire contact members. Another embodiment provides a method of measuring the outer diameter of a tire, the method comprising: providing a tire measurement apparatus; placing the tire measurement apparatus in contact with a tire, where the two or more tire contacting members are arranged along an outer diameter of the tire along a tread of the tire; and, measuring the tire to indicate a measurement or size of the tire, where a measurement or size is generated.