Factor O2 VAM
Climbers who want Factor. Ostro if you also care about aero.
Factor's lightweight race bike. Less aero than Ostro, still a low race fit.
Climbers who want Factor. Ostro if you also care about aero.
Factor's lightweight race bike. Less aero than Ostro, still a low race fit.
CX racers. If you want gravel capability, look at Checkpoint or Checkmate instead.
A UCI cyclocross race bike with IsoSpeed on some generations. Tight, muddy, and built to be shouldered — not a Checkpoint with CX tires.
Climbers and riders who want a light Specialized that isn't a full aero race bike. Not an endurance bike.
A lightweight road bike without the Tarmac's aero brief. It climbs and floats; it does not try to be a Tarmac SL7 in a crosswind. The position is still race-adjacent, not Roubaix-tall.
Racers who want a climbing Orbea. Orca Aero is the wind-cheating sibling.
Orbea's lightweight race bike, OMX carbon on high kits, and a fit that is race-low without S5 drama. OMX vs OMR changes weight more than geometry.
| Measurement |  FactorO2 VAM 2024 |  TrekBoone 2022 |  SpecializedAethos 2022 |  OrbeaOrca 2025 |
|---|---|---|---|---|
| Stackmm | 565 | 583+18 | 565 | 552−13 |
| Reachmm | 388 | 394+6 | 387−1 | 385−3 |
| Head tube angle° | 73.3 | 72.0−1.3 | 73.5+0.2 | 72.8−0.5 |
| Seat tube angle° | 73.2 | 73.5+0.3 | 73.5+0.3 | 73.5+0.3 |
| Chainstaymm | 405 | 425+20 | 410+5 | 408+3 |
| Wheelbasemm | 993 | 1038+45 | 991−2 | 981−12 |
| BB dropmm | 70 | 66−4 | 72+2 | 70 |
| BB heightmm | — | — | — | — |
| Standovermm | — | — | — | — |
| Part | O2 VAM 56 | Boone 56 | Aethos 56 | Orca 53 |
|---|---|---|---|---|
| Stem | 100 mm | 100 mm | 100 mm | 90 mm |
| Bar | 420 mm | 420 mm | 420 mm | 400 mm |
| Crank | 172.5 mm | 172.5 mm | 172.5 mm | 170 mm |
The Trek Boone 5 Can Tackle the Toughest 'Cross Races ... With a carbon frame built to absorb shocks, the Boone can crush cyclocross races, smooth the roughest ...
Trek's recently launched Boone introduces new frame shapes, new cable management and thru-axles, but most importantly its proprietary IsoSpeed decoupling ...
Step forward the Specialized Aethos. I reviewed this thing in the Pro model and I was rather smitten. The ride is sublime, the weight for a disc brake road bike ...
It's reliable, intuitive and offers sensible gearing ratios that allow extensive range without big jumps. Specialized Aethos Comp. (Image credit: Future). I ...
Arnaud De Lie's Orbea Orca Aero is a sprinter's dream and packs special grease ... Team Lotto's Belgian sprinter Arnaud De Lie chalked up two top-5 finishes in ...
Ridden by the Lotto pro team, the Orca is Orbea's lightweight bike, perfect for climbing. Cyclist writer Joseph Delves reviewed the top spec M10i LTD model in ...