The Profile Z Coaster Freecoaster Female Hub is hand made in the USA, designed from the ground up by Profile to be the most versatile and reliable freecoaster hub. The Shell is machined from 6061 aluminium and features a Crmo centre female axle, it can easily be used as either a Freecoaster or regular cassette hub by simply switching the Slack-Cam ring inside the hub. Profile's Z coaster features a unique Driver which uses Z shape pawls which allows for adjustment from 1/8 of a crank to 1/3 of a crank by changing the Slack Cam ring. The driver is also supported from the outside by a huge bearing making this hub ultra reliable and maintenance free. Please note: Available with a huge choice of 14mm female bolts or 10mm bolts with a 9t driver, just select your drive side and colour and then select your slack ring and bolts at the Checkout. Titanium driver upgrades are also available at checkout. ###section### Product Specs HUB TYPE: Cassette / Coaster Switchable AXLE: Female Bolts DRIVER: Choose In Basket DRIVE SIDE: Right Side Drive SPOKE HOLES: 36h WEIGHT: 560g (1.23lbs) Colour: Black, White, Purple, Blue, Polished; Size: RHD