J-24 Tuning Guidelines

Forestay Tension and Mast Prebend

True Wind Speed (Knots) 0-4 5-8 9-12 13-16 17+
Forestay Tension -20 -15 -5/0 10+ 20+
Mast Prebend 2.5″ 2″ 1.75″ 1″ .75″

Rig Settings: Old Loos Gauge Model B

True Wind Speed (Knots) Uppers Tension Lower Tension
0-5 18 12
6-9 20 15
BASE 10-13 24 21 BASE
14-17 27 24
18+ 30 31