Fizik also contributes to the eye-catching bike with a matching Fizik Antares saddle for the Belgian national champion - Josh Evans/Immediate Media
Oliver Naesen's Factor ONE in custom Belgian national champion colours - Josh Evans/Immediate Media
For Opening Weekend, Naesen used a Factor O2 for Omloop Het Nieuwsblad and a Factor ONE for Kuurne-Brussel-Kuurne - Josh Evans/Immediate Media
Each of Naesen's Belgium champion bikes feature a similar paint scheme and detailing - Josh Evans/Immediate Media
The cobbles specialist is the natural leader for the French WorldTour team - Josh Evans/Immediate Media
AG2R La Mondiale pair its Factor bikes with wheels from French manufacturer Mavic - Josh Evans/Immediate Media
Naesen's third bike for Omloop was seen with a Shimano Ultegra crankset - Josh Evans/Immediate Media
A closer look at the CeramicSpeed OSPW system - Josh Evans/Immediate Media
Contrasting decals stand out on the black base coat of the frame - Josh Evans/Immediate Media
A number plate mount from K-Edge is attached at the brake bolt - Josh Evans/Immediate Media
The CeramicSpeed OSPW system on Naesen's number-one race bike featured red jockey wheels - Josh Evans/Immediate Media
AG2R La Mondiale uses SRM's Origin crankset, equipped with Shimano Dura-Ace 9000 series chainrings - Josh Evans/Immediate Media
Naesen uses team colour bidons, which don't quite match with the colour scheme of his special bike - Josh Evans/Immediate Media
Black Inc provides the cockpit components and seatpost on AG2R La Mondiale's bikes - Josh Evans/Immediate Media
A closer look at the Shimano Dura-Ace R9100 rear brake on Oliver Naesen's Factor O2 - Josh Evans/Immediate Media
The Factor ONE has the unusual split down tube design, also seen on the company's time-trial model - Josh Evans/Immediate Media
Wide Stance's seatstays allow air to flow through the stays as well as around them. Factor claims this improves aerodynamic performance - Josh Evans/Immediate Media
Naesen's Factor ONE is equipped with Shimano Dura-Ace 9000 series direct-mount brakes - Josh Evans/Immediate Media
AG2R La Mondiale is one of several WorldTour teams that uses Continental Competition ALX tubular tyres - Josh Evans/Immediate Media
The Di2 interface box is located in the handlebar end - Josh Evans/Immediate Media
AG2R La Mondiale uses Shimano Ultegra chains, presumably to keep costs down - Josh Evans/Immediate Media
The seat tube hugs the shape of the rear wheel - Josh Evans/Immediate Media
CeramicSpeed provides AG2R La Mondiale with the OSPW system in conjunction with a Shimano Dura-Ace R9150 rear derailleur - Josh Evans/Immediate Media
The bike features the national colours of Belgium through the design - Josh Evans/Immediate Media
A look at the drivetrain on Naesen's Factor ONE - Josh Evans/Immediate Media
The Factor ONE is the company's aero-specific framesets and features many expected design aspects of a modern aero frameset - Josh Evans/Immediate Media
The custom saddle from Fizik features on both the Factor ONE and Factor O2 - Josh Evans/Immediate Media
The Factor ONE also has an unusual front hinge steering design as opposed to a traditional fork steerer running through the head tube - Josh Evans/Immediate Media
The Factor ONE comes with an integrated handlebar/stem cockpit setup and is paired with Shimano Dura-Ace R9150 levers - Josh Evans/Immediate Media
A look at the non-driveside of Oliver Naesen's Factor ONE - Josh Evans/Immediate Media
AG2R La Mondiale use Look Keo Blade Carbon pedals - Josh Evans/Immediate Media
Belgium's royal coat of arms features at the bottom of the underside of the down tube - Josh Evans/Immediate Media
Factor's 'Wide Stance' design also extends to the forks of the ONE - Josh Evans/Immediate Media
Truncated stays and tubing reduces turbulence as wind flows over the frame - Josh Evans/Immediate Media
Oliver Naesen's Factor O2 in custom Belgian national champion colours - Josh Evans/Immediate Media
The Belgian royal coat of arms on the seat tube of Naesen's bike - Josh Evans/Immediate Media
As with some of the European national road champions, Naesen then had the honour of wearing the famous national colours of Belgium during the Tour de France and the 12 months that follow.
It wasn't until the RideLondon Classic after the Tour de France that Naesen was equipped with a custom-finished Factor O2 to complement the national champion's jersey.
For the 2018 season, at least until the national championships at the end of June, Naesen will continue to wear and race on the national colours of Belgium, on the Factor O2 and, for the new season, the aero-specific Factor ONE.
The Factor ONE features several eye-catching design features to cheat the air, including a split down tube, integrated head tube steerer, 'Wide Stance' forks and seatstays and, perhaps expectedly, an integrated cockpit system.
The national colours of Belgium make up the bold design of the frameset, which also features the country's motto 'L'union fait la force' on the top tube and the royal crest on the underside of the down tube.
Oliver Naesen's Factor ONE in custom Belgian national champion colours - Josh Evans/Immediate Media
Fizik further adds to the bicycle with a Fizik Antares saddle, which is also in custom colours for the Belgian champion.
AG2R La Mondiale pairs its Factors with Mavic wheels, Black Inc finishing kit and a Shimano Dura-Ace groupset. CeramicSpeed and SRM are integrated into the groupset with an oversized pulley-wheel system and crankset-based power meter respectively.
Click or swipe through the gallery above for a closer look at Naesen's two bikes in the national champion colours of Belgium.
