CY4-SHC-RS520 & CAPACITY BOOSTER SET

Set of ultra-high performance inner chainring "CY4-SHC-12S-RS520" and "CAPACITY BOOSTER" (Big Pulleys) specially designed to work with SHIMANO 12-SPEED drivetrain.

CYCLOIDⅡmechanism
CYCLOIDⅡis the non-circular chainring developed uniquely by Sugino.
“Autofocus mechanism” ;assists your pedal stroke to remain smooth and efficient at all time so that your pedaling technique can be dramatically improved. Thus, CYCLOIDⅡis the innovative high performance chainring, totally different from any other ovals

Super Hill Climb
*Special design, ultralight non-circular chainring perfect for hill climb and long ride.
*Super small inner chainring 32T not available from SHIMANO offers great performance gain at hill climb.
*Using #804 bolts will ensure that the overall weight will be kept down.

CAPACITY BOOSTER
Just swapping out Shimano original pulleys to Sugino "CAPACITY BOOSTER" increases rear derailleur capacity and prevents chain slack when crosschained in small /small when CY4-SHC-12RS520 is used

●CY4-SHC-12S-RS520
Material : CNC aluminum alloy
Compatibility : SHIMANO FC-RS520
Chain : SHIMANO 12-Speed
P.C. D. : 110mm (SHIMANO 4 Bolts)
Size : 32T for SHIMANO 50T
Color : Black
*Front derailleur needs adjustment.
CY4-SHC cannot be used with the cranks with Power Meter

CAPACITY BOOSTER (Guide pulley 12T & Tension pulley 16T)
●CB12SUL/105 for RD-R8150 (ULTEGRA) / RD-R7150/RD-R7100 (105)
Material : CNC aluminum alloy (S3 coated)
Bearings : Ceramic (sealed)

*Set includes 1 CY4-SHC inner chainring and 1 CAPACITY BOOSTER (2 Pulleys-guide & tension)

*Front derailleur needs adjustment.
*50-32T gearing setup exceeds drivetrain capacity and have slack in the chain. Sugino CAPACITY BOOSTER perfectly fits Shimano 12-speed drivetrain, work with the standard cage on Shimano derailleur and boost derailleur capacity and shifting performance.

You can use the original bolts that came with your SHIMANO crank or ”804 for SHIMANO"(sold separately).