So we just teased this a few days ago, but now have the full details. BH Bikes today introduces the latest iteration of their G-series aero road bike with the new disc-brake G7 Disc. A big jump form the current G6 Pro that tucks a direct mount brake under the bottom bracket (and will carry over unchanged for next year), this new version adds flat mount discs taking pride in the increased safety of more consistent braking. But BH claims that with years of R&D in both computer analysis and in the wind tunnel, their main goal was to improve the aerodynamics of the bike even adding disc brakes.
Find out how they did after the jump…
The new frame combines Pitch Fiber and Toray T24 Fibers for a lightweight, stiff, and reactive frameset for the G7 Disc. Lateral rigidity is increased over the G6 thanks to a redesigned headtube and steerer, a Press Fit 386 bottom bracket, and the addition of 12mm thru-axles front and rear.
Every frame detail was looked at, how it affected aerodynamics and stiffness, and the brakes were no exception. But the addition of disc brakes was given high priority to ensure that the new G7 Disc would perform at its peak even in poor riding conditions. Without a front caliper brake, the downtube and fork were able to more smoothly integrate without adding more turbulence at the top of the wheel. And the front brake tucks in nicely behind the fork leg with only a minimal frontal profile, and only a measurable impact to wind yaw angles from the left.
For the rear end, low seatstays yield better aerodynamics vs. the G6, and an extended seatmast and aero seatpost clamp setup reduce wind resistance and stresses on the frame and post. Geometry keeps the BH race philosophy, with a sloping toptube and compact rear end for quick handling and maneuverability. The strong point of the G7 Disc is definitely its braking power. The frame was optimized specifically to deal with the brake action, and gets much increased stiffness with the thru-axles that make the disc perform best.
The G7 Disc will be offered in four complete builds: Shimano Dura-Ace for 8000€, SRAM Red or Shimano Ultegra Di2 for 6500€, and Ultegra mechanical for 5000€. The Dura-Ace and Red builds get an FSA K-Force crankset, while the Ultegras get an SLK. All bikes get hydraulic discs, with the mechanical Ultegra getting the new R505 controls we previewed early this year that are expected in October. The frame will be the same throughout and comes in 3 sizes. The first bikes are expected to become available in Europe some time in December. We expect to see even more from BH next week.
