SX10EX (Semi Hollow, Extra Light)
 
SUMC is colour coated making it abrasion and corrosion resistant. The chain last much longer with the coating in addition to the refreshing look.The outer plate design allow you to shift smoothly between gears for better power transfer. A good choice for Brompton bicycles with 5/ 7 speed gear system.
 
The mid-level EL-series chains are semi-hollow for lighter weight and excellent power transfer.