American Custom Bicycles in Steel, Titanium and Ti/carbon mix
For riders planning to take advantage of Shimano’s Di2 groupset or Campagnolo’s EPS system, Seven Cycles offers internal wire routing on all our frames.
Since the introduction of electronic shifting systems, we have offered the clean, protected look of internal routing. Standard set ups include ports at the top of the down tube, at the front derailleur, and at the rear derailleur, with batteries mounted in seat posts (Shimano) or in the seat tube (Campagnolo). We stay abreast of all currently supported wiring strategies, so non-standard configurations (e.g. with junction box in stem) are also available.
Our Slipstream Di2 wiring upgrade, designed specifically for the newest Shimano Dura Ace 9150 and 9170, and Ultegra 8050 and 8070 components, offers a number of improvements for 2018/19. We’ve minimized the external run of the wiring. The setup is cleaner, simpler, and the wire is more secure. Additionally, the frame ports are more hidden from the eye. The wiring follows the brake routing into the frame, so the port is hidden by the brake housing. This wiring path looks better and produces less drag. We couple this with a direct mount rear derailleur hanger for optimal integration.
For internal routing of dropper post hydraulic lines, we provide a single port at the base of the seat post. From the control on the handlebar, the line follows zip-tie-guides along the down tube to the port.
Seven does not offer internal routing of mechanical or hydraulic brake cables, despite the obvious aesthetic benefit of doing so. There are four primary functional reasons for our decision not to support internally routed mechanical and hydraulic brake lines. First, too much friction. To run a cable internally, you need to run housing the entire length of the cable, which creates too much drag on the cable and subsequently poor braking performance. Second, it's too heavy. Again, to run either cable or hydro lines internally, it is necessary to create a channel, essentially another small tube inside the tube, to keep the housing from moving too much inside the frame. That adds significant weight. Third, any bike set up this way becomes very difficult to service efficiently. Finally, the size and number of holes made in the frame to serve shift and brake cables lead to the frame becoming too fragile. As a company with a lifetime warranty on our frames, we simply cannot offer this feature in good conscience.