J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment PHRF and Spin Pole Length

You should talk to your Club's measurer.

The SPL and spinnaker girth measurments go hand in hand. The 180% max girth measuremnt is a multiple of the SPL.

If you shorten the pole without also cutting down all of your spinnakers there will be no benefit.