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 international standards ISO-9633, the length between 2 pins is the main baseline for judging the chain’s stretch. However, the measurement could be completely different as some tools take the data from between 2 rollers. This may make a huge difference when you try to figure out the chain still working or not.  So what do […]