Campagnolo 2009/10 Super Record Ultra Torque 11 Speed Chainset Steel Axle
Features the new XPSS large chainring, unidirectional cabon fibre arms, CULT greaseless ceramic bearings and lighter alloy chainring bolts that thread directly into the small chainring.
The standard steel spindled Super Record crank has a claimed weight of 680g
full-carbon unidirectional-multidirectional cranks
hollow cranks (Ultra- Hollow(TM) Structure)
light alloy fixing bolts
light alloy chainrings with XPSS(TM) (eXtreme Performance Shifting System)
chainrings with hard anodization treatment
8 pins on the large chainring
CULT(TM) bearings (Ceramic Ultimate Level Technology)
integrated ULTRA-TORQUE(TM) semi-axles
Weight: 585 g
LIGHTNESS, RIGIDITY, SIMPLIFIED ASSEMBLY AND MAINTENANCE: ULTRA-TORQUE™.
THIS IS CAMPAGNOLO'S ANSWER IN THE INTEGRATED CRANKSET SECTOR.
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 codes :
FC9-SR092C 170mm 39/52
FC9-SR093C 170mm 39/53
FC9-SR592C 175mm 39/52
FC9-SR593C 175mm 39/53
FC9-SR540C 175mm 34/50
FC9-SR792C 177.5mm 39/52
FC9-SR793C 177.5mm 39/53