FACTOR OSTRO VAM
Lightweight Aero All-Rounder
When the most important aspect of performance is everything – aero, lightness, comfort, handling – the OSTRO is the answer. If pros were limited to one bike to ride all year, they’d all choose the OSTRO in a heartbeat.
The OSTRO VAM is very nearly as aero as the ONE, as ultra-lightweight as the O2 VAM, and as smooth as the O2.
It’s ready for dream trips to the mountains or to the cobbled Classics, for long weekend rides or fast-paced chaingangs, and it especially loves to be raced. It can take tyres up to 32mm, so it’s ready for Britain’s rougher tarmac.
The Everything Bike
The pros love it because they never have to sacrifice aerodynamics for lightness or comfort and most races feature mixed terrain. Everyone else loves the OSTRO because it can do the job of three bikes. No matter the ride, it’s always the right bike. Suddenly, N=1.
Most sizes and colours in stock now
Order today and you could have your new bike custom built for you within 1 week. Same day bike fit and built service turnaround also available.
Let us help you find your size and dial in your fit
We offer a state-of-the-art bike fitting service from our Experience Centre, using the idmatch system. We can also assist remotely to give you a recommendation.
Our mechanics build your bike in-house in Norfolk
Your new bike will be assembled by the skilled technicians in our Experience Centre in Norfolk. It can be delivered straight to your door or you can collect it for a New Bike Day experience.
Factor designed the OSTRO from the ground up to be as aerodynamic as possible, while also being superlight. Three key technologies enabled this achievement.
The frame tube shapes are aggressively truncated NACA airfoils which deliver the low drag of a much deeper airfoil shape while maintaining lightness, ride quality and stiffness under power.
The fork uses a ‘wide stance’ concept, with the legs set further from the wheel, and the crown features Factor’s ingenious ‘Reversing Flow Energising Channel’. Both work to greatly reduce the turbulence caused by incoming airflow colliding with air being dragged forwards (reversing flow) by the rotating wheel and tyre. In turn, this smooths the airflow onto the downtube, further reducing drag.
The OSTRO’s fully integrated cockpit increases efficiency in several ways. Its sleek, aero shape is an easy win into clean air, and the hidden cabling also reduces drag. These are now common on high-end bikes. What makes the OSTRO special is that Factor achieved this without enlarging the headset and negating the benefits (as most brands do), so the frontal area and headtube profile remains optimised.Build My OSTRO
The OSTRO is made from exceptionally high grades of carbon fibre, resulting in a disc-brake aero frame which is very light in weight.
This achievement means that Chris Froome and his Israel – Premier Tech teammates can benefit from the aero even on mountain stages. After all, an aero bike isn’t saving any watts sat in the team truck.
For the rest of us, the OSTRO is the bike to do it all. It isn’t just about the mix of terrain in your favourite Sunday loop, it’s about the mix of rides in your ideal year. The OSTRO is the aero bike you can take on holiday to Tenerife or the Pyrenees and feel perfectly equipped.Build My OSTRO
Smoothness is an essential component of efficiency and speed. The OSTRO was designed for pro riders to use at Paris-Roubaix, the most brutal of the cobbled Classics and known as a breaker of bikes and riders. It’s a 260km race that averages around 45kph, so a bike this fast can make a huge difference. While British roads might not be as bad as pre-war cobbles, our rough surfaces require mitigation. In both scenarios, many riders in the past were left with no choice but to sacrifice aero for more comfortable options. Aero and comfort were seen as mutually exclusive.
The OSTRO rips up the old dogma with three key design features: it has huge 32mm tyre clearance, ultra-thin seat stays which absorb vibration, and the carbon layup is the result of scores of iterations to reach an exceptional degree of compliance for a frame with immense stiffness under power.
To save weight and aero drag, and in line with customer wishes, the OSTRO is built for electronic groupsets only
Thread-fit BB standard gives a secure fit and makes maintenance easier
Ensuring every customer enjoys optimised handling characteristics, the OSTRO uses three different fork offsets across the size range compared to the industry standard of two
The mid-depth aero profile and lightweight seatpost is offered with a choice of 0 or 25mm setback
The OSTRO is compatible with the one-piece Black Inc Barstem as well as conventional separate bars and stems. When using separate components, the cables enter the frame below the stem
The handling and fit geometry of the OSTRO are both near identical to the O2 and O2 VAM, which makes it easy for the pros to switch between models and eliminates that issue when you’re choosing which Factor to buy
Get inspired and check out the latest builds to roll through our workshop
Secure your new Factor OSTRO with a £500 Deposit (Fully Refundable)
- Factor OSTRO VAM Frameset
- Black Inc FORTY FIVE Wheels
- Black Inc Integrated Barstem
- Shimano Ultegra Di2 R8170
- Available in: 2-4 Weeks
SPECIFICATION & GEOMETRY