Description

Set the course on fire .

When BMC set out to design the ultimate time-trial bike, it looked to both its SLR01 and TM01 frames as inspiration. Essentially, it was looking to create a frame that not only handles well in a variety of conditions, including crosswinds, but that also was aesthetically pleasing. After all, fast looks are at least half the battle in our minds. The result was the Timemachine TMR01 Shimano Ultegra Complete Bike.

And while BMC took the science of aerodynamics and velocity and applied it to the frame design using a formula of Vmax = p2p x suBA or 'Maximum Velocity = Position to Perform x Aerodynamics of the Rider and Bike,' all you really need to know is that the design was optimized to be fast, with you on it.

P2p, or Position to Perform, is essentially the position of the rider. BMC knows that being able to adjust position to be the most aerodynamic possible, has the effect of reducing drag coefficient. But, at the same time, if the position is uncomfortable for long periods, power is compromised. To accommodate a comfortable position, BMC used its 21_21 offset concept which allows fore and aft movement of the saddle.

After looking at position, the next step was to examine drag on the frame. The formula suBA acknowledges that aerodynamics are maximized by minimizing the front area of the frame at four features exclusive to the TMR01. The frame received a tear-drop design that fits within the UCI 3:1 length to width ratio. Worked into this design is a truncated profile that leads to straight break-away edge of the seat stays. This helps to reduce turbulent airflow, and at the same time it reduces the amount of material needed to construct the frame. The break-away edge also functions to increase the stiffness of the rear triangle.

Now, there is no use in having the ultimate clean, aero frame, if it's covered with cables and wires. To this end, BMC incorporated internal cable capabilities into the frame. Regardless of what system you may choose to upgrade to, BMC's Dual Transmission Integration (DTI) ensures that your system is routed internally. The front and rear brake calipers are hidden within the lines of the fork and frame which further reduces drag. Minute frame molding helps to create a slight turbulence above the frame surface which creates an artificial boundary layer allowing the air to stay attached to the frame longer. This also results in less drag.

This version of the TMR01 is built with full Shimano Ultegra 6700. The workhorse of the Shimano line, Ultegra is lauded for its durability and consistency throughout the range of shifting. The drivetrain is built around the compact 50/34set-up and a 12-30tooth rear cassette. The TMR01 rides on a Mavic Cosmic Elite Wheelset with the Force/Attack tires. The cockpit features Easton EA70 bars, with a matching EA70 stem. Rounding out the build is the Fi:zi'k Arione CX manganese saddle.

The BMC Time Machine TMR01 Shimano Ultegra Complete Bike is available in the color White and in six sizes from 48 to 61cm.

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Here's what others have to say...

5 5

Awesome

  • Gender: Male
  • Familiarity: I've put it through the wringer

Superb Stiffness...First frame EVER not to flex at the bottom bracket during full sprint output (and I'm a fit 6'2", 103kgs!!)