Smart assembly – Replacing a bike chain and no need to remove it from cassette. SIGMA PRO, a synonym of strong combination, makes the chain assembly safe and tool-free. HOW IT WORKS ◆LOCKING STEP 1A. Sigma Pro linkB. Sigma Pro top plate STEP 2Push and hold the top plate through the chain link STEP 3Place […]

EASY assembly – A convenient joint-link could saving your time! Sigma+ is easy to use and a great tool for all cyclists. Most importantly, it is compatible with all 12 to 8-speed bike chains in the market place! HOW IT WORKS ◆LOCKING STEP 1Insert both halves of Connector into the both ends of chain. STEP […]

According to the international standards, ISO-9633, the method to evaluate the chain’s stretch is to measure the length between 2 pins. However, the measurement could be completely different nowadays as most of the tools measure the chain stretch between 2 rollers. This method will cause a huge difference when you try to evaluate the chain still […]