Chinook Aluminum Mast Extension - US Cup (Reduced Diameter)
These Chinook extensions are the RDM version, made to fit reduced diameter masts and fit a US base cup style mast foot. The aluminum alloy is lightweight and durable and the EX power-haul pulley and cleat system has oversized brass pulleys to make downhauling easier. Composite Snap Collar system eliminates lost pins or collars and can be quickly adjusted with one hand in 2cm increments. The short size gives you up to 12cm of extension, medium is up to 28cm of extension and long is up to 38cm of extension.Curious about Chinook products? Learn more about Chinook in our blog post here.