Every Sparkman & Stephens Iw 31 price in your inbox: mainsail and genoa in each cloth, the spinnaker, sock, storm sails and canvas, plus the rig dimensions.
Made to measureIllustration. Yours is cut to this boat’s measurements.Express +8%, economy 5.5% off. Shown as its own line in your cart.
Made to measureIllustration. Yours is cut to this boat’s measurements.Express +8%, economy 5.5% off. Shown as its own line in your cart.
The sock goes in your cart as its own line, linked to this spinnaker.
OSR max 6.6 m²Luff tape relies on a foil, so it does not meet the OSR luff-attachment rule. Choose hanks or wrap luff for offshore racing.
| Measurement | Metres | Feet |
|---|---|---|
| I (fore-triangle height) | 11.45 | 37.6 |
| J (fore-triangle base) | 3.50 | 11.5 |
| P (mainsail luff) | 9.50 | 31.2 |
| E (mainsail foot) | 2.85 | 9.4 |
| Mainsail area | 15.8 m² | 170 ft² |
| Fore-triangle area | 20.0 m² | 216 ft² |
| Length overall (approx.) | 9.45 | 31 |
We confirm your measurements before anything is cut.
From A$1,610.40 in Dimension-Polyant Optimum Cruise with 3 leech battens and a full-length head batten, or A$1,746.80 with 4 full battens. C-Breeze, the long-life cloth, starts at A$2,113.10. Every mainsail is cut to the Sparkman & Stephens Iw 31 rig (P 9.50 m, E 2.85 m) with two reefs.
We build 110% to 150% LP for the standard rig (I 11.45 m, J 3.50 m). Pick a smaller genoa for a windy home port and a larger one for light-air sailing. Furling genoas start at A$1,898.60.
A Size 3 (50 m²) asymmetric suits the Sparkman & Stephens Iw 31 fore-triangle. It starts at A$1,628, or A$2,293.50 with a dousing sock.
The Offshore Special Regulations cap a storm jib at 5% of I squared (6.6 m² here) and a trysail at 17.5% of P × E (4.7 m²). That makes our Medium (5.7 m²) storm jib the right size. No stock trysail is small enough for this rig, so we quote one to fit.
Measure I, J, P and E and compare them with the rig table. We confirm every measurement with you before the sail is cut.
For a race programme, a Sydney to Hobart or a bluewater expedition, our sister loft Kraken Sails designs laminates, membrane sails and storm wardrobes for the hard end of sailing.
