Pro Bike: Alexandre Moos' BMC TT01 Time Machine

By James Huang, technical editor | Thursday, February 19, 2009 6.37pm

Swiss veteran Alexandre Moos is the elder statesman of the relatively young BMC squad currently racing at the Tour of California. His history with the BMC bike brand - he was also with Phonak - and Swiss background nets him a closer relationship with the team’s bike sponsor. Thus it's fitting that in the time trials in this year's Tour of California, Moos will use a full-blown BMC TT01 Time Machine, while his teammates will all use the second-tier TT02.

Unlike the aluminium and carbon TT02, the TT01 is a full carbon construct and is offered in no stock sizes whatsoever. Using what BMC terms its Personal Precision Program, each TT01 is made to measure with custom geometry based on the rider’s physique and flexibility and even variable tube wall thicknesses based on rider weight and strength.

The TT01 bears the usual aero trickery such as the airfoil-profiled down tube, seat stays and seatpost, shielded rear wheel and internal cable routing but several other features, some small and some not, offer some distinction from other TT rigs.

BMC foregoes the conventional head tube and fork steerer in favour of a 'living hinge' design similar to those now used by other makes such as Look and Felt. This system allows for smaller pivot bearings - making for a narrower and more aerodynamic front end - but also effectively increases the airfoil section depth of the entire head tube area for further drag reduction. In BMC's case, the entire area is also particularly well integrated for extra-smooth airflow from fork to head tube.

BMC has also maintained the sleek and narrow theme to the top of the fork, which smoothly transitions to a fully integrated aero stem that uses a unique eccentric handlebar clamp to provide a bit of adjustability in both reach and height for the Easton Attack TT aero bar. Down below, the narrow-and-deep down tube extends past the bottom bracket shell to offer a little extra protection to the rear wheel.

The telescoping aero seatpost is fixed with a clever internal wedge system so there is no external clamp to disrupt airflow.:

The telescoping aero seatpost is fixed with a clever internal wedge system

A clever internal wedge system housed within the seatpost allows for some height adjustment without the need for an external clamp to disrupt the airflow, while a rail system up top affords a generous amount of fore-aft movement. Perched atop Moos' post is a Selle Italia SLR saddle slammed a long way forward but with a trimmed nose to stay within UCI guidelines.

BMC has also provided moos with its sleek aero crankset. :

BMC has also provided Moos with its sleek aero crankset

In addition to the premium frame, BMC has also provided Moos with its ultra-rare aero carbon crankset. The arms bear an especially deep cross section, the spider is a fully enclosed disc, and even the backs of the chainrings are filled in smooth. Though most of the industry has hopped on the external bearing bandwagon, BMC fixes these cranks to a good old-fashioned square taper Campagnolo bottom bracket.

Componentry-wise, Moos' bike displays the common practice of using last year’s road gear; in this case the 10-speed version of Campagnolo’s Record group. The standard derailleurs are used both front and rear and there are also the familiar D-Skeleton brake callipers at either end, fitted with Corima’s popular red blocks for use on carbon rims.

Those brakes clamp down on a full carbon flat disc out back and a deep-section carbon tubular up front, both fitted with Continental Podium tubulars. According to team mechanic Vincent Gee, Moos will often run slightly lower pressures than the rest of the team when the conditions are rough for better traction.

…but the surface dimples and molded-in logo give away their true identity. dt swiss doesn't currently offer a deep-section wheel or a full disc though so it's really no big deal.:

The DT Swiss wheels are clearly rebadged Zipps

Though both wheels were labelled with gigantic DT Swiss logos - the official team sponsor - characteristic surface dimples and molded-in 'Zipp' logos betrayed otherwise. Team head mechanic Ian Sherbourne says this substitution wasn't made by virtue of one company offering a superior product relative to the other though; DT Swiss simply doesn't offer a deep-section wheel or full disc at the moment, though it's possible one or both may be in development.

Moos will have two opportunities to show off his TT01 - first at the opening prologue and again in Solvang for the longer 24km time trial. Even if he doesn't do well, however, he can at least perhaps find some comfort in knowing that he very likely has the most expensive time trial bike in this year's illustrious field: retail cost for the bare chassis alone (frame, fork, headset, seatpost, and integrated stem) is over US$12,000.

Full specification

  • Frame: BMC TT01 custom
  • Fork: BMC TT01
  • Front brake: Campagnolo Record D-Skeleton w/Corima pads
  • Rear brake: Campagnolo Record D-Skeleton w/Corima pads
  • Brake levers: Vision Aero
  • Front derailleur: Campagnolo Record QS STD+CT 9s/10s
  • Rear derailleur: Campagnolo Record
  • Shift levers: Campagnolo Timetrial Bar-end 10s
  • Cassette: Campagnolo Record 10s steel/titanium, 11-23T
  • Chain: Campagnolo Record Ultra Narrow
  • Crankset: BMC carbon, 175mm, 44/54T
  • Bottom bracket: Campagnolo Record square taper
  • Front rim: Zipp 808 (badged as DT Swiss)
  • Front hub: DT Swiss 240s Radial
  • Spokes: DT Swiss Competition 14/15g
  • Rear wheel: Zipp 900 Tubular (badged as DT Swiss)
  • Front tyre: Continental Podium tubular, 22mm
  • Rear tyre: Continental Podium tubular, 22mm
  • Bars: Easton Attack TT, 38cm (c-c)
  • Stem: integrated
  • Headset: integrated
  • Tape/grip: Easton cork
  • Pedals: Time RXS Racer
  • Seat post: BMC TT01
  • Saddle: Selle Italia SLR with trimmed nose
  • Bottle cages: Elite Custom Race
  • Total bike weight: 7.94kg (17.5lb)
  • Critical measurements

  • Rider's height: 1.74m (5'8") ; Weight: 65kg (143lb)
  • Seat tube length, c-c: 545mm
  • Seat tube length, c-t: 590mm
  • Saddle height, from BB (c-t): 753mm
  • Tip of saddle nose to C of bars (next to stem): 564mm
  • C of front wheel to top of bars (next to stem): 493mm
  • Top tube length: 565mm (horizontal)
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