One Design Parts

Specially made by the Zim Rigging Department for the top Optimist competitor, this is the ultimate 4:1 mainsheet block and clip. An upgrade over our standard mainsheet clip block, this assembly allows a 4:1 purchase which can be super helpful in heavy...

Stainless steel clevis pin - 1/4" x 1/2" with 3/8" grip length.  Commonly used for the ILCA Harken Vang Lower Base Unit vang tang pin (to connect the vang lower unit to the tang on the lower mast section).

The ISCA Rig Bag / Spar Bag from Colie Sails is just the right size. Roomy to allow for storage of the booms, mast and a gently furled sail. Easy stowage. Keep your sail out of the sun in our durable, breathable & water resistant Top Gun® bag...

Heavy duty C420 cover by North Sails, designed for trailering your C420 sailboat.

Stainless steel 1/4 inch by 1 inch hitch pin commonly used on C420 and FJ sailboat pintles to keep the rudder secure. This retainer pin is a great accessory for program boats to add an additional layer of security.  Hitch Pin 1/4 inch by 1...

Selden 40mm fiddle block with hook, cam & eye. Currently used on the RS Tera & RS Zest as the standard supply for the kicker unit. Specification: Weight: 218g Safe Working Load: 250kg Breaking Load: 500kg Max Line Size: 7mm Adjustable arm with...

Selden Aluminium Tiller Extension Supplied with Selden UJ fitted Used on boats such as the RS Aero, RS Tera, and RS Feva Material: Aluminium Length: 1.1m RS Sailing Part # RSM-FO-913

The Optimist X-gripped Color Series – “Doppio” edition A 20 mm black anodized aluminium 60 cm tiller extension for the Optimist. Fitted with a special x-gripped heat shrinkable tubing, called “Doppio” and a releasable joint...

The perfect Optimist rudder blade for Optimist training and school use. Optimist rudderblades from Optiparts can be used with the tillers, extensions and rudder fittings on and are available with and without rudderfittings (mounted). Optiparts #...

Upgrade your ILCA lower mast section with this Hi-Load vang tang from Selden with this complete uprade kit. This innovative fitting is 100% stronger than the previous design, with virtually no increase in weight—a breakthrough that significantly...

Upgrade your ILCA lower mast section with this Hi-Load vang tang from Selden. This innovative fitting is 100% stronger than the previous design, with virtually no increase in weight—a breakthrough that significantly enhances both performance...

Optimist adjustable maststep with reinforced cup. This cup is improved in several key areas to make it more durable: The base and the round part of the cup are both thicker, increasing from 1.5 mm to 2 mm. The weld between the cup and the threaded...