The Profile Z Coaster Hub is primarily a cassette hub that can be disengaged and run as a freecoaster. Hand made in the USA, the Z-coaster has been designed from the ground up by Profile to be the most versatile and reliable freecoaster hub, with a CNC machined 6061 aluminium shell and features a hollow 14mm chromoly axle for strength and durability. The hub can be used as either a freecoaster or regular cassette hub by simply switching the Slack-Cam ring inside the hub, with a huge bearing outside making this hub ultra reliable and maintenance free. Please note: Sold standard with a 14mm Hollow Male Axle (You can upgrade to titanium at checkout) and a 9t Driver! - Select your drive side and colour and then select your Slack ring at checkout. ###section### Product Specs HUB TYPE: Cassette / Coaster Switchable AXLE: 14mm Male DRIVER: Choose In Basket DRIVE SIDE: Right Side Drive SPOKE HOLES: 36h WEIGHT: 583g (1.29lbs) Colour: Blue, Red, Gold, Black, Purple, Matt Black, White, Polished; Size: RHD, LHD