An in-depth look with video at BMC’s latest super bike, the BMC TM01.
The 2011 season was a big one for BMC. They won the Tour de France for the first time, Cadel Evans taking the yellow jersey in the final time trial aboard a late prototype version of this bike. Then, in the TM01’s first Ironman-distance triathlon, Challenge Roth, Andreas Raelert broke the world record for a 180km bike leg with the astonishing time of 4:11:43, an average speed of 42.9kph (26.6mph). And, proving that BMC hadn’t persuaded him to go all out on the bike for the publicity, Raelert put in an equally strong run to complete the fastest ever long-distance time of 7:41:33. Safe to say, then, that this bike has pedigree.
BMC refer to the aero package of their flagship bike as ‘subA’. This begins with the minimised frontal area and very neatly integrated brakes. Unusually, the front brake is built into the front of the hinge-type fork; the rear brake is hidden in the normal place behind the bottom bracket.
Adrian Zahnd, BMC Marketing Coordinator, says the biggest breakthrough made by the engineering team during the TM01’s development was the ‘Tripwire’ concept. “The Tripwire technology uses special curbs which are built into the leading surface of the vertical sections of the frame,” says Zahnd. “The
Tripwire creates small turbulences at these points which delay the layer separation of the airflow. As a result the airflow along the tube is optimised.”
The tube shapes themselves are truncated 3:1 teardrop profiles, which Zahnd explains: “Instead of continuing the surface with a characteristic teardrop shape, a straight breakaway edge is worked into the profile. The main advantage is reduced weight, as less material is used. Improved stiffness is a consequence of the additional two edges.” The truncated airfoils make air behave as if it’s following a much longer (and therefore more efficient) airfoil shape while staying within UCI rules and allowing BMC to focus on one cutting-edge design for both TT and triathlon.
To achieve the perfect fit, the TM01 uses BMC’s P2P (position to perform) principle. This includes the seatpost, which allows the saddle to be slid 21mm forward and back from the centre for a true, leg-saving triathlon position. The other element of P2P is the multi-adjustable Tri Angle Concept stem – it has a total of 32 possible configurations.
Frame TM01 pure carbon
Fork Aero Hinge pure carbon
Gears Shimano Dura-Ace Di2
Brakes BMC integrated
Wheels Zipp 808 Firecrest
Finishing kit Profile PX-2 bar, Fizik Arione Tri2 carbon saddle
For more information, please visit www.bmc-racing.com
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