Tire Fill Tool FAQ
What tire size notation is on the side of my tire (Metric, Standard – 2 Number, or Standard – 3 Number)?
Does your tire size have a slash (“/”)?
If yes, your tire size is given using the metric convention.
Does your tire size have an “x”?
If yes, your tire size is given using the Standard – 3 Number convention.
If your tire size does not have a “/” or an “x” then your tire size is given using the Standard – 2 Number convention.