|Apparently from Campagnolo (May 10, 2006):
2006 - Campagnolo unveils Ultra-Torque, the system that combines the
crankset and bottom bracket in a single component, available in various
versions in the Campagnolo 2007 range.
The road bike market has been waiting for a response from Campagnolo on
cranksets for some time and Campagnolo had reiterated that it would not
resort to systems already in existence as they do not meet its desired
standards. The times are now mature and the result is truly remarkable.
Ultra-Torque is the name given to the new range of Campagnolo cranksets
and immediately puts the spotlight on the extraordinary ability of this
crankset-bottom bracket combo to transfer torque. Both cranks have a
bottom bracket semi-axle integral with them in such a way as to form two
"Ls"; these are then joined in the middle of the bottom
bracket shell by means of a Hirth joint. The two semi-axles have a large
section so as to be light and rigid at the same time. The Hirth joint
which joins them is known for its use in the automobile field where it
is used to join together pieces of engine shafts which develop enormous
power. This solution has made it possible to unite the two bottom
bracket axles and transform them into an extremely rigid assembly. The
Hirth joint is self-centring and self-aligning and is kept in one piece
by a screw which preloads the assembly to over 500 kg.
Campagnolo cranksets which adopt the Ultra-Torque system will be 100
grams lighter on average than their 2006 crankset-bottom bracket
equivalent. Such a weight saving has been obtained thanks to the new
crank design and the "Ultra-Torque" solution for the
integrated bottom bracket.
Greater torsional and lateral rigidity
The Ultra-Torque system has been designed to obtain a markedly superior
result in terms of torsional and lateral rigidity compared with the
previous and already excellent Campagnolo system. The two semi-axles,
joined together by a Hirth joint, form an extremely rigid assembly
capable of transferring very high torque values.
Q factor and lateral dimensions unchanged
The Q factor remains identical to the value which set apart the
cranksets in the 2006 range. If this is already an excellent result in
itself, it is even better when you discover that there has been no
increase in the lateral dimensions of the cranks. Unlike other
manufacturers who because they use external bearings were obliged to
increase the dimensions of the cranks in the interface zone with the
bottom bracket axle, Campagnolo was able to overcome the problem by
resorting to semi-axles. This is because this solution allows the
bearings to be inserted from the internal connecting point and therefore
significantly increase the diameter of the interface between the
semi-axles and cranks. The result is that the cranks can be flatter in
the connection zone with the same static strength and life cycle,
thereby compensating for the greater thickness of the external cups.
Thanks to the Ultra-Torque system the cyclist will not experience any
reduction in the space available and will not be obliged to make
reparatory adjustments such as repositioning the pedal cleats to prevent
rubbing between shoe ormalleolus and the middle part of the crank.
Extremely low rotation friction
Rotation friction is extremely low with the Ultra-Torque system thanks
to the quality of the bearings used, the seal system, the refined design
and the constructive rationality.
Fast and simple installation Installing an Ultra-Torque crankset on your
bike is amazingly straightforward: it involves screwing the two cups
onto the frame and joining the two cranks together by means of a single
screw. It's as easy as that! With an eye on standardization that makes
life simpler, Campagnolo decided to use tools already in existence. The
cups are screwed in using tools available on the market and only a
normal 10 mm socket wrench is needed to tighten the cranks.
Fast and simple maintenance
The crankset can be disassembled in just a few seconds: unscrew the
screw which unites the two semi-axles using the 10 mm socket wrench;
pull the cranks off the bottom bracket shell; clean and lubricate the
bearings again; and that's that!"
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