This aero bike sports some features that likely won't be allowed in competition.

Stefan Küng's BMC Timemachine Road
Stefan Küng chose BMC’s brand new Timemachine Road Disc for his training ride in the days leading up to the 2018 Tour de France. It’s BMC’s newest aero bike. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The Timemachine road features some triathlon touches, like the integrated bottle cages. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
This integrated structure will likely have to be removed before it can be used in competition, since it probably constitutes a fairing. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The down tube features some unique shaping, presumably for aero benefits. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
That down tube shaping seems to work in conjunction with the integrated water bottle cage system. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
Unlike the shallow D-shaped seatpost on BMC’s Teammachine, the Timemachine Road features a deeper D-shaped post. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The seatpost’s shape likely adds some aero gains, but it can also make for a harsher ride. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The stem is quite long. This allows for an aggressive, forward position that sprinters trend toward. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
Like the Teammachine, the Timemachine features an integrated stem that allows the mechanics to route cables and hoses out of sight, down through the head tube. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The stem features a thin profile, but it’s fairly wide across. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
Aero bikes often appear smoothly sculpted, but the Timemachine takes an opposite tack: there are clear lines and angles visible around the head tube. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The fork features an integrated brake fairing. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
That fairing certainly adds aero benefit, but like the water bottle cage system, this feature would likely need to be removed before use in competition. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
The fairing helps shield the brake caliper from the wind, since the caliper’s somewhat blocky shape adds drag to the front of the bike. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
Clearance is tight. Photo: Dan Cavallari | VeloNews.com
Stefan Küng's BMC Timemachine Road
A Team BMC mechanic makes a last-minute crank swap before the team’s training ride. Photo: Dan Cavallari | VeloNews.com