AUTOFOCUS MECHANISM
When the force is applied to the pedal, the chain moves outward. You feel the ring increases the diameter as the chain runs higher on the ring. As amount of moving will fluctuate by the force applied, it maximizes the benefits of non-circular ring, and assists your pedal stroke to remain efficient.
*there is no need of pedal stroke analysis to identify peak point or adjustment of mounting position.
*there is no need of pedal stroke analysis to identify peak point or adjustment of mounting position.
SPECIAL TOOTH PROFILE
The special tooth profile provides perfect shifting and prevents chain-drop.
SUPER SMALL INNER CHAINRING 32T and 33T
Specially designed to work only with genuine SHIMANO 50T or 52T outer chainring on SHIMANO crank.
Super small inner chainrings 32T or 33T not available from SHIMANO, offers great performance gain at hill climb.
A 50-32T configurations numerically exceeds front derailleurs capacity. Due to the special mechanism of CYCLOIDⅡ, the chain is being shifted when the inner ring is equivalent to 34T. So, the derailleur function and shifting performance won’t be diminished. The same is the case with a 52-33T, shifting occurs when the inner ring is equivalent to 36T.
*SHIMANO crank and outer chainring on the photo are not included.
Super small inner chainrings 32T or 33T not available from SHIMANO, offers great performance gain at hill climb.
A 50-32T configurations numerically exceeds front derailleurs capacity. Due to the special mechanism of CYCLOIDⅡ, the chain is being shifted when the inner ring is equivalent to 34T. So, the derailleur function and shifting performance won’t be diminished. The same is the case with a 52-33T, shifting occurs when the inner ring is equivalent to 36T.
*SHIMANO crank and outer chainring on the photo are not included.
Other recommended products
#804 FOR SHIMANO
Sales price : JPY 2,900
Fixing Bolt set for SHIMANO CRANK, High-strength aluminum alloy torx bolts. Ultra-light alloy bolts can reduce the overall weight of your bike.
Ultra-high performance inner chainring, with superior functionality to any other ovals, specially designed to work with SHIMANO 50T or 52T on SHIMANO crank.
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
"What is Autofocus mechanism?"
When the forth is applied to the pedal, the chain moves outward. You feel the ring increases the diameter as the chain runs higher on the ring. As amount of moving will fluctuate by the force applied, it maximizes the benefits of non-circular ring, and assists your pedal stroke to remain efficient.
*there is no need of pedal stroke analysis to identify peak point or adjustment of mounting position.
*As positional relation with outer ring is fixed, excellent shifting is ensured.
*Special tooth profile prevents chain-drop.
Super Hill Climb
*Special design, ultralight non-circular chainring perfect for hill climb and long ride.
*Super small inner chainring 32T or 33T not available from SHIMANO offers great performance gain at hill climb.
*Using #804 bolts will ensure that the overall weight will be kept down.
Material : CNC aluminum alloy
Compatibility :
SHIMANO FC-R9100 / 9000
FC-R8000 / 6800
FC-R7000 / 5800
Chain : SHIMANO 11 speed
P.C. D. : 110mm (SHIMANO 4 Bolts)
Size : 32T, 34T (Inner) for SHIMANO 50T
33T. 36T (Inner) for SHIMANO 52T
Color : Dark grey / Red
*FC-RS510 which is 11-speed crankset with equivalent features to 105 is not compatible with CY4-SHC.
*Front derailleur needs adjustment.
*For 32T and 33T, we recommend to mount a long cage rear derailleur, for example RD-○○○-GS.
*Some gearing setup numerically exceeds front derailleur capacity.
However, CYCLOID is designed for Shimano 11speed and works perfectly fine with it.
"COMPATIBILITY OF CY4-SHC"
You can use the original bolts that came with your SHIMANO crank or #804 for SHIMANO (sold separately).
Download the Press Release;
CYCLOID SHC