- Our Half Link chain is the most reliable in the industry, the perfect chain for maximum adjustability and great looks. Half-Link chains are perfect if you're looking to run a single speed setup on a bike with vertical dropouts. Their adjustability makes them ideal for getting your wheels into the perfect position. Half-Link chains give you the ultimate level of adjustability, allowing you to cut down the length of the chain by half a link each time, which means you can get the perfect link without having to compromise. * 1/2" X 1/8" - 100 Links, pin length 9,5mm * Compatible with: BMX / Freestyle * Super Smooth and Adjustable * Half Link Design * Nickel Plated