J24 TUNING GUIDES USING LOOS GAUGES

OLD GAUGES WIND STENGTH UPPERS TENSION LOWERS TENSION
     
  0 – 5 18 12
  6 – 9 20 15
BASE 10 – 13 24 21
  14 – 17 27 24
  18+ 30 31
       
NEW LOOS GAUGE      
     
  0 – 5 15 12
  6 – 9 16 13
BASE 10 – 13 19 17
  14 – 17 22 19
  18+ 25 26
       

 

North Sails tuning guide

http://www.au.northsails.com/SailProducts/OneDesign/J24/J24TuningGuide/tabid/8858/Default.aspx