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.

SIGMA pro connector in 10 speed bike chain

HOW IT WORKS

LOCKING

STEP 1
A. Sigma Pro link
B. Sigma Pro top plate


STEP 2
Push and hold Sigma Pro top plate, pass open Sigma Pro link through the end of the chain


STEP 3
Place the top plate over the free rivet groove while bending the link


STEP 4
Press down Sigma top plate until
you hear a “click”, the chain is
correctly assembled


STEP 5
Check all of the chain to ensure no stiff links

◆UNLOCKING

STEP 1
Open a chain by bending it hardly with the top plate of Sigma Pro toward yourselves until the top plate jumps out.

Noted: SIGMA PRO only for One-time use.



Sigma Pro Connector Product List

SC-20 | 9 SPEED
SC-23 | 8 SPEED
SC-25 | 7-6-5 SPEED
SC-33 | 1 SPEED