Description
Factor O2 VAM Ultegra Road Bike
Whether you’re chasing Strava KOMs, taking on the Étape du Tour, or descending mountain passes at full tilt, the Factor O2 VAM Ultegra Road Bike delivers the perfect balance of weight, stiffness, aero efficiency, and handling precision. It’s the ultimate choice for cyclists who refuse to compromise. Add to the mix smooth Shimano shifting, and you have a bike that won't hold you back as gradients hit double digits.
Born to Climb – Lightness Without Limits
The O2 VAM was designed from the ground up for pure climbing performance. Weighing just 6.4kg (size 54 with Dura-Ace Di2 build), it sits among the lightest disc brake bikes ever built – yet remains fully aerodynamic. Constructed using ultra-high-grade carbon fibre and a new manufacturing process developed in Factor’s own factory, the O2 VAM achieves an unrivalled stiffness-to-weight ratio. Every pedal stroke translates directly into forward motion, making long climbs feel smoother and faster than ever before.
Aerodynamics That Defy Gravity
Unlike traditional climbing bikes, the O2 VAM doesn’t sacrifice aero gains for lightness. Its meticulously optimised tube shapes reduce drag so effectively that, in the wind tunnel, it’s only 5 watts behind the OSTRO VAM – the fastest aero bike in the world. Across all wind angles, the O2 VAM cuts aerodynamic drag by 50% compared to its predecessor. It flies uphill and still outpaces many dedicated aero models on the flats.
Unrivalled Stiffness and Handling Precision
Factor’s engineers ensured the O2 VAM handles as brilliantly as it climbs. Sharing its geometry with the OSTRO VAM, this bike offers razor-sharp handling, confidence-inspiring cornering, and exceptional stability on high-speed descents. Its incredible stiffness means explosive acceleration when you stand on the pedals, while the new Black Inc 28//33 wheelset adds featherweight performance and aerodynamic balance. Combined with 32mm tyre clearance, the O2 VAM adapts perfectly to any road condition without compromising efficiency or control.
Integrated Bar-Stem
- Frame size 49cm: Bar width: 38cm /Stem length: 90mm
- Frame size 52cm: Bar width: 38cm /Stem length: 90mm
- Frame size 54cm: Bar width: 40cm /Stem length: 100mm
- Frame size 56cm: Bar width: 40cm /Stem length: 100mm
- Frame size 58cm: Bar width: 40cm /Stem length: 110mm
- Frame size 61cm: Bar width: 40cm /Stem length: 110mm
Technical Specification
| Frame | O2 VAM TeXtreme®, Toray®, Nippon Graphite® Pitch-Based Fibre |
| Fork | Factor O2 VAM Aero fork |
| Headset | CeramicSpeed SLT 1-1/8″ and 1-3/8″ bearings |
| Axles | Front Axle, 12 x 100mm thru-axle - Rear Axle, 12 x 142mm thru-axle |
| Rims/wheels | Black Inc 28|33 Wheelset |
| Hubs | Front/Rear- HU-07 Alloy Body |
| Bearings | CeramicSpeed |
| Spokes | Black Inc Straightpull Aero Carbon Spokes |
| Tyres | Goodyear Eagle F1 R Tube Type |
| Crankset | Shimano Ultegra FC-R8100 Chainset |
| Chainring(s) | 52/36 |
| Bottom Bracket | CeramicSpeed T47A |
| Chain | Shimano CN-M8100 XT with Quick Link 12 Speed Chain |
| Front Derailleur | Shimano Ultegra Di2 FD-R8150 |
| Rear Derailleur | Shimano Ultegra RD-R8150 |
| Cassette | 11-30 |
| Shifters | Shimano R8170 Ultegra |
| Handlebar and Stem | Black Inc Integrated Barstem Reach 80mm, drop 120mm. Multiple stem lengths and bar widths available - contact us for more details |
| Grips/Tape | Factor Bar Tape |
| Brake Levers | Shimano R8170 Ultegra |
| Brakes | Front Rotor 160mm - Rear Rotor 140mm |
| Saddle | Selle Italia SLR Carbon Rail Saddle L3 |
| Seat Post | O2 VAM Seatpost Topper - 3 Lengths - 0 and 25mm setback available - contact us for more details |
| Battery | Shimano Di2 BT-DN300 |
| Charger | Shimano EW-EC300 12-Speed Di2 Charging Cable 1700mm |
| Max tyre clearance | 32mm measured |
| Accessories & Extras | Black Inc V10 Barstem Computer Mount, Spare Rear Mech Hanger |
Size Guide
Factor O2 VAM Ultegra Road Bike Sizing
Delivery & Returns
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Why buy your bike from Sigma Sports?
Don't hesitate to reach out to us. It's our goal to answer all of your questions and offer the best advice from our experts. We’ll be happy to answer any questions you may have. Contact us now or visit us in-store.
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Choose between Free Bike Delivery - to your home or place of work - or our new Premier Bike Delivery Service £99.99 and have your bike delivered "ready to ride" and set up to your measurements with seatpost and pedals adjusted on arrival by a qualified bike mechanic. Either way, our Customer Care team will be in touch to arrange a delivery date to suit you.
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