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FAQ: Rings

How do I determine the piston rings I need?

To determine which ring set set you need, you need to know the size and style.


Turn the piston upside-down and measure the width of the very bottom of the skirt.
Take the measurement 90° from the wrist pin hole.


Measure each ring groove with a set of calipers.

Based on the 3 groove sizes, the style would be:

  • .039″, .047″, .110″ – XC/GNH
  • .059″, .059″, .110″ – XN
  • .039″, .039″, .079″ – XG


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