Product Description
Campagnolo FC20-CH12 Chorus 12 Speed Double Road Carbon Chainset In Black
Besides distinguishing themselves for their unparalleled quality and performance, Campagnolo products have also become the benchmark of design. This is testified by the prestigious Compasso d'Oro award granted by the Associazione Design Italiano in recognition of the Veloce groupset, Ergopower integrated controls and Shamal high-profile wheels. Campagnolo is not only involved in the cycling world, but dedicates itself to all sports in general. In fact, it was named by the Wall Street Journal as one of the most prominent sports brands in the world. A reputation earned not only as a result of the countless successes achieved in racing competitions, but also by virtue of the attention given to quality and to service that sets this company apart from all others.
Campagnolo FC20-CH12 Chorus 12 Speed Double Road Carbon Chainset In Black
The new Chorus chainset is a true concentrate of technology and versatility.
Technically advanced thanks to unidirectional construction technology in carbon fibre, it is directly moulded without any surface coating and has an Ultra-Torque steel axle like the Record chainset.
The new 12x cranks are more versatile thanks to the new bolt pcd of 123mm, giving it an extremely solid structure, also ensuring a wider variety of uses.
The new smaller bolt circle on the Chorus chainset makes it compatible with 36/52, 34/50 and the brand new 32/48 ratio chainrings.
Available in 170mm, 172.5mm and 175mm crank lengths.
Technologies-
Ultra-Torque axle: In steel
Features and Benefits-
The Q Factor remains the same (145.5): The widths and biodynamics of the stroke are the same.
Unidirectional carbon fibre cranks, steel axle and aluminium chainrings: Good stiffness and optimum power transmission.
Symmetrical teeth on the internal chainring: Fluid, precise transmission, even with extreme cross-chaining.
Optimised design for any chainring combination: Maximum performance, whatever the course style.
Double Fixing: Assembly of the large chainring on to the crank is secured by a ring of 123mm bolts, while the inner chainring is attached to the outer by way of 96mm pcd bolts.
Surface treatment of the chainrings for longer life
Weight: 718g (172.5 34/50)
Technology
X.P.S.S.™ is the embodiment of a project conceived with a very specific objective: to give the new Campagnolo 12-speed groupsets the best possible derailing performance. And the Campy Tech Lab™ has hit the mark once again.
The ascent and descent zones on the chainrings have been designed down to the smallest detail, using mathematical simulation programmes that reproduce the potential movements of the chain on the chainrings and draw the ideal angles of these. Repeated tests in the laboratory have enabled the speed and precision of derailings to be optimised. The profile of the chainring teeth has also been revised in order to render the action of these even more effective, and to ensure that they are perfectly in tune with the 12 Speed chain and the new front derailleur. All of these improvements enable a 25% increase in derailing under load and and a 20% the fluidity of shifting.
Indeed, the secret of this amazing result is the perfect combination and integration of all the components of the drivetrain: each of these is designed to work and function perfectly with the others - this is what enables you to enjoy the extraordinary performance that the new X.P.S.S. system offers.
AFTER MORE THAN 10 YEARS SINCE ITS INTRODUCTION THE ULTRA-TORQUE™ SYSTEM, IT IS STILL CONSIDERED, THE BEST PERFORMING CRANK-SET SPINDLE IN TERMS OF STIFFNESS, LOW WEIGHT AND EFFICIENCY OF POWER TRANSMISSION.
Campagnolo found a way to permanently conjoin the semi-axles of the bottom bracket to the respective crankset arms. This redesign made it possible to considerably reduce the lateral dimensions at the axle level and prevent annoying contact with the ankles when turning the pedals.
Assembly is simplistic: one single oversize bolt is enough to integrate the two semi-axles. With regard to torque transmission efficiency, this system is equally as effective as a single piece axle.
Furthermore, despite the narrow side profile, we have been able to position the bearings outside the bottom bracket shell, resulting in greater axle rigidity from the increased axle diameter. This breakthrough was obtained by using an ingenious mechanical system derived from many years' motoring experience in the rotation axle and engine shaft coupling sector: the Hirth joint.
In short , this is a joint with self-centring and self-aligning frontal teeth located in the middle of the bottom-bracket
axle where the ends of the semi-axles, integrated with the crankset arms, come into contact.
Campagnolo is constantly focused on the performance of its groupsets for all its ranges, from Super Record™ to Ekar™.
Its Micro Precision Shifting™ (M.P.S.™) System fully refl ects this philosophy: absolute precision, speed and a reduction of the distance covered by the chain when moving from one chainring to another.
Mechanical work on the outer chainring is proof of the obsessive attention to detail and the persistence of the engineers at our Campy Tech Lab™ who expect the maximum performance from all of Campagnolo’s products. The result is amazing and now moving from one chainring to another, even under load, will no longer be a problem!
Optimised design of the up-shift and down-shift zones and of the profi le of the teeth – enables fast and precise shifting in all types of conditions.
Weight : 728 grams (172.5 version with 32/48)
Campagnolo codes & sizes :
FC20-CH12062 170mm 36/52
FC20-CH12240 172.5mm 34/50
FC20-CH12262 172.5mm 36/52
FC20-CH12540 175mm 34/50