One Design Parts

The ILCA Vang Upper Block is a Harken wire block with becket with attached vang key. It features indented sides to prevent the line from slipping off the sheave. The included vang key is the latest 'updated' style with larger head for improved strength...

Upgrade your ILCA vang with this new high load upper vang block from the hardware experts at Ronstan. Introduced as part of the Series 30 Block collection, the RF34108HLK is a low friction, low profile vang block with clevis pin for removing vang key...

The 16 mm is Harken’s® smallest block. It is perfect for small synthetic control lines found on high-tech dinghies. The patented bearing system uses stainless steel balls in a captive grooved race. Sheave 16 mm / 5/8 in Length: 54 mm / 2 1/8...

The magnetic boat set is a great teaching tool for sailors and coaches. Ideal for accurately depicting races, on water situations, enforcing and teaching the Racing Rules, as well as for evaluating protests. Great for sailing clubs, committees, sailors...

Nylon wear protection pads for the ILCA dinghy. Designed to stop the mainsheet blocks from damaging the deck of the boat. The wear protectors clip around the traveler fairlead and are held in place by friction and the traveler rope. There is no overhang...

Replacement deck mount bracket for the Nautalytics Laser/ILCA compass. Includes an anodized aluminum deck bracket with two (2) sets of 3M™ Dual Lock adhesive and four (4) mounting screws Made by Nautalytics Lightweight anodized aluminum...

This magnetic Optimist protest set is ideal for accurately displaying dinghy races, enforcing and teaching the racing rules, as well as for protests. For sailing clubs, committees, sailors and coaches to use on a whiteboard. This pack comes in a handy...

This Opti hiking strap is made from strong nylon webbing with comfortable foam padding. Installs easily and is comfortable to hike with. Double strap Strong stitched through construction Length: 26 inches

Here at Zim Sailing we stock and sell more Optimist Airbags than anyone else in North America.  Our airbags are fabricated from a heavy duty polyurethane and feature a long twist valve style tube. We sell 43L and 48L airbags. Typically 43L...

The Optimist deck collar is made of Delrin to create minimal friction between the sleeve and the collar. The oval inner diameter allows the maximum fore/aft and minimum side play and the tapered inner diameter allows the mast to be raked. 4 countersunk...

Standard nylon mast deckcollar for Optimist. Hole size in deck: 53 mm.  Optiparts part # EX1208