The Chinook Sailing Alloy US Cup Extension uses custom alloy and bell shaped tubing to provide the best weight to strength ratio available in alloy construction. The new, easy to use Composite Snap Collar system eliminates lost pins or collars and can be quickly adjusted with one hand. All come with the proven Euro-Pin EX Power-Haul pulley and cleat system and 2 cm adjustment increments.

Reduced Diameter

US Cup Fitting

Stainless steel button 'plate' engages on three sides of the Euro-Pin for safer attachment

Large brass pulleys for increased leverage

SDM Extensions in US Cup available as a special order. Please call or contact us. US Cup Chinook Std Dia.

See video below for rope threading tips.