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Chainwheel set for Cyclocross, featuring high-rigid aerodynamic outer ring and special non-circular inner ring designed with patented technology. New IDS24 axle, nickel coated, engineered at highest level of precision provides higher durability, prevents corrosion and wear, and enhances overall performance.

P.C.D. : 110/74mm
Axle : IDS24
B.B. : MB608 (BSA) Steel (included)
Compatibility : SHIMANO 11speed/10speed
Chine line : 43.5mm
Q-factor : 145mm
Crank material : Hard forged aluminum alloy

Crank length : 160, 165, 167.5, 170, 172.5, 175
Combinations : 46-36

Special features :
"Outer chainring"
High-end, aerodynamic chainring offers superior performance in all high-speed sections where sprint is necessary. Having large surface area, it effectively pushes away dirt and mud.

"Inner ring" CYCLOID Ⅱ
Non-circular inner ring alternates gearing between 32T and 39T, allows you to quickly spin through the top and bottom dead spots. Incorporating "Autofocus mechanism", it helps you ride through difficult terrains such as mud, soil and steep slope.

"What is Autofocus mechanism?"
When the great amount of power is produced in the pedal stroke, the chain moves outward, and the ring increases the diameter to the maximum. As the gearing is modulated automatically according to the pedal power, you can get effective gearing throughout the pedal stroke.
*there is no need of pedal stroke analysis for detecting peak point or adjustment of mounting position.
*As positional relation with outer ring is fixed, excellent shifting is ensured.

"Super low Q-Factor 145mm", perfectly symmetric ensures smoother and efficient pedaling.
"Large ankle clearance" keeps the shoe from rubbing the crank.

Before installation, please check ;
Front Derailleur Position for installing chainwheel