Campagnolo Ultra Torque OS-Fit Bottom Bracket Shells 86.5 x 41mm

LIGHTNESS, RIGIDITY, SIMPLIFIED ASSEMBLY AND MAINTENANCE:ULTRA-TORQUE™.

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• Material: Aluminum
• Dimensions: 86.5mm x 41mm
• Compatibility: Super Record (EPS), Record (EPS), Chorus

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Scope of delivery

• 1 pair of bearing shells (2 pieces)
• without bearing
• without bottom bracket shell

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TechnologiesUltra-Torque™
LIGHTWEIGHT, STIFF, EASY TO ASSEMBLY AND MAINTENANCE: ULTRA-TORQUE™.
THIS IS CAMPAGNOLO'S ANSWER IN INTEGRATED CRANKSETS.

6 YEARS AFTER ITS INTRODUCTION, ULTRA-TORQUE™ IS STILL RECOGNIZED, IN TERMS OF STRENGTH, WEIGHT SAVINGS AND POWER TRANSMISSION, AS THE BEST PERFORMING BICYCLE BOTTOM BRACKET SHAFT.

Campagnolo has ensured that the two axle halves of the bottom bracket are inseparable from the respective crank arms. This new development has made it possible to significantly reduce the lateral protrusion from the frame at axle height, thus preventing unwanted contact with the ankle during pedaling.

Their assembly is extremely simple, a single oversize bolt is used to firmly connect the two halves of the axle. In terms of torque transmission effectiveness, this system certainly stands up to comparison with a one-piece axle.

In addition, despite the narrow side profile, we have managed to place the bearings outside the bottom bracket shell, making the axle, which has been given a larger diameter, stiffer thanks to the increased support width. We were able to achieve these characteristics by using the Ultra-Torque™, which is based on Hirth spur gearing, an ingenious mechanical system born of long experience in engine building in the field of couplings of rotary axles and engine shafts.

This is basically a coupling connection with self-centering and self-aligning spur gearing, which is placed in the center of the inner bearing axle where the ends of the axle halves firmly connected to the crank arms touch each other.