Smart assemble – replacing a bike chain quickly and easily. SIGMA PRO makes chain fitting safe and tool-free. HOW IT WORKS ◆LOCKING STEP 1A. Sigma Pro linkB. Sigma Pro top plate STEP 2Insert the two pins into the chain. Fit the plate. Push to click the plate into the first groove STEP 3Bend the chain […]

Easy assembly – a convenient connector saving you time Sigma+ is easy to use and a handy tool for all cyclists. There are now SIGMA+ connectors compatible with all 8 to 12-speed chains. Just pick the speed you need. HOW IT WORKS ◆LOCKING STEP 1Insert both halves of the Sigma+ connector into both ends of […]

According to the international standard, ISO-9633, the method to evaluate the chain stretch is to measure the length between 2 pins. However, most tools measure the stretch between two rollers which can give an entirely different reading, leading to some confusion about whether the chain is worn or not. So what do we do?  Method […]