One Design Parts

Reinforced cup for the Optimist mast step. This version 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 section...

Airbag buoyancy aid for Optimist Sailboats from Colie. These Optimist buoyancy bags are made of polyurethane coated nylon and are about half the weight and significantly stronger than buoyancy bags made of PVC or PVC coated nylon. Buoyancy bags are...

Airbag buoyancy aid for Optimist Sailboats from Colie. These Optimist buoyancy bags are made of polyurethane coated nylon and are about half the weight and significantly stronger than buoyancy bags made of PVC or PVC coated nylon. Buoyancy bags are...

Low-friction Carbo Air blocks are lightweight, strong, reliable—and affordable. Companions to the popular Harken Black Magic block line, these small, compact blocks have very high working loads for safe, easy trimming. Zim Applications ISCA Race...

This 1/4 inch quick pin allows for the detachment of the ILCA vang body from the mast to be quick and easy. Works on both Harken and Ronstan ILCA vang lower units. The push lock ensures that the pin stays put on even the roughest days. This pin is...

This sticker acts as a guide, allowing you to hoist and trim the sail to the proper level on an Optimist sailboat. Use Blue for Silver / Quicksilver Optimist masts Measures position of sail relative to the mast and boom

Replacement tiller wedge for Zim C420, Zim 420E, and FJ (East Coast) sailboats. Fits Zim Sailing C420 Tillers, 420E Tillers, and FJ (East Coast) Tillers Not compatible with LP and Vanguard C420s Zim Part # 80306

Stainless hoop trapeze ring with block.  You won't ever miss when you hook in. Great for your Zim C420. Weight: 63.00 g Safe working Load: 150 kg Breaking Load: 350 kg Max line size: 6 mm Purchase: 1

The 27 mm Optimist SILVER regatta sprit has 15 cm anti chafe protection tubing. Optiparts Part Number EX1041Oversize Shipping This item is oversize due to length and or weight, but can still ship via common carrier to Continental USA addresses. A flat...

The lightweight 40 mm Optimist SILVER regatta boom from Optiparts is much stiffer than the 32mm school boom and will allow the Optimist sailor to put more tension on the leach. Optiparts Part Number EX1022.Oversize Shipping This item is oversize due to...

The professional model tension gauges will provide an increase in accuracy and convenience of use when compared to Loos & Co.'s standard gauges. The gauge may be hooked on wire and will remain in position while the tension is adjusted. Works with...

Upgrade your ILCA deck block plate and block assembly with the latest 29mm Harken Carbo Blocks. This assembly features 2 Harken 464 29mm Carbo Blocks with removable sheave plus a standard stainless deck plate. This system works great for modern control...