{"product_id":"chinook-aluminum-extension-us-cup-reduced-diameter-tall","title":"Chinook Aluminum Extension - US Cup Reduced Diameter Tall","description":"The Chinook Aluminum US Cup-RDM-Tall 38cm Extension delivers premium performance for serious sailors. Engineered with custom alloy and bell-shaped tubing, it maximizes strength while minimizing weight—critical for mast systems where every gram matters.\n\nThe innovative Composite Snap Collar system eliminates the frustration of lost pins and collars, allowing single-handed adjustments on the water. Paired with the proven US Power-Haul pulley and cleat system, this extension provides reliable, responsive control in demanding conditions.\n\nKey features include a maximum 38cm mast extension, reduced diameter design for compatibility, US basecup mounting, and large brass pulleys engineered for increased mechanical advantage. Fine 2cm adjustment increments let you dial in the perfect sail trim.\n\nBuilt for durability and ease of use, this extension is an essential upgrade for competitive sailors and those who demand precision equipment.","brand":"Chinook","offers":[{"title":"Default Title","offer_id":45413976735778,"sku":null,"price":112.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0876\/5646\/4418\/files\/30S-AluminumExt_USCupRDMTall48cm_1600x_jpg.webp?v=1782947854","url":"https:\/\/larsonsport.com\/products\/chinook-aluminum-extension-us-cup-reduced-diameter-tall","provider":"Larson's Ski \u0026 Sport","version":"1.0","type":"link"}