While the new Madone and the sweetly disguised Bolide were all the pre-Tour attention, Cervelo sneaked the new S5 in without anyone noticing. Hidden in plain sight, the new S5 was finally released with a stage win and overall victory.

The current best aero bike takes as much design inspiration from TT bikes as we would consider "standard" road bikes. Perhaps more than any other, the Cervelo S5 is the most TT-like, with a bold rear wheel slot in the seat tube, a split stem reminiscent of TT aero extension supports, and a hinged head tube.

The latest S5 has already taken the yellow and green jerseys at the Tour de France, with stage wins for Van Aert, Vingegaard, and Laporte.

Major adjustments have been made in the name of "simplification, refinement, and enhancement," all of which are basically synonymous. These are basically synonyms. In other words, visually, the frameset is very similar to the previous model, but the tubing profile, tire clearances, and areas that were a little harder to live with on the front end have been improved.

A trademark of the Cervéros is the sheath tube rear wheel cutout. The tube profiles are deeper all around to match the latest UCI tolerances. The bottom bracket area is also higher, as seen on other newer bikes like the Scott Foyle.

The trailing edge has also been changed to a more aggressive shape for more precious watts. The fork shape has also been redesigned, with an updated nose on the hinge (the leading edge of the entire bike).

The frame is now exclusively electronically controlled disc, reminiscent of Trek's new Madone and many of their better aero bikes. The frameset itself is designed in conjunction with the new Reserve wheelset and is optimized around 28mm tires, but can accommodate up to 34mm.

Of all the unique bar and stem combinations found on modern aero bikes, the Cervelo S5 is perhaps the most quirky setup, employing a bi-stem system. This has been criticized for being difficult to work with and not offering a large range of adjustment, so newer versions have been simplified.

Now there are no stack-height-specific bolt lengths, and standard bolt lengths are used between stems of different lengths and between different stack heights, making interchangeability relatively simple. The bars also attach to the stems more simply and rotate 5 degrees for a better fit. This simplification also makes the entire system 53 g lighter.

The shape of the bars has also been slightly adjusted, with the transition between the bars and the hood completely flattened to allow for the most aero UCI-approved position, with the forearms resting on the bars behind the hood.

In the rear, the traditional 25mm offset seatpost has been replaced by a 15mm offset seatpost to accommodate the latest trends in bike fitting. However, if a more radical position is desired, the traditional 25mm offset post can also be used.

The new Cervelo S5 is available in three colors: black, purple/white, and red/black. Since it is electronic only, it is offered in Dura-Ace, Ultegra, Red, Force, or as a frameset.

The Red eTap version retails for £12,999 and the Ultegra version for £9,199. The frameset retails for £5,499. U.S.A. Pricing is still unknown, but is expected to range from about $15,700 to $11,100 for the full model and $6,650 for the frameset.