2025 Factor Ostro VAM SRAM Power Meter vs 2026 Giant Propel Advanced Pro (Di2)
The XS is the Giant Propel Advanced Pro (Di2) size closest to your 45 Factor Ostro VAM SRAM Power Meter. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Giant Propel Advanced Pro (Di2)
Compared with the Factor Ostro VAM SRAM Power Meter in 45, the Giant Propel Advanced Pro (Di2) in XS places the top of the head tube 15 mm higher and 16 mm further forward, relative to the bottom bracket. Its wheelbase is 6 mm longer, which can contribute to stability at speed.
- Frame stack
- +15 mm
- Higher front end
- Frame reach
- +16 mm
- Longer frame reach
- Wheelbase
- +6 mm
- Longer: steadier at speed
- Head angle
- −0.1°
- About the same head angle
- Chainstays
- ±0 mm
- About the same
The two frames
Factor Ostro VAM SRAM Power Meter, 45Giant Propel Advanced Pro (Di2), XSDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Factor Ostro VAM SRAM Power Meter 45 | Giant Propel Advanced Pro (Di2) XS | Difference |
|---|---|---|---|
| Reach | 360 | 376 | +16 mm |
| Stack | 502 | 517 | +15 mm |
| Head tube angle | 71.1 | 71 | −0.1° |
| Seat tube angle | 75.5 | 74.5 | −1.0° |
| Chainstay length | 405 | 405 | ±0 mm |
| Wheelbase | 970 | 976 | +6 mm |
| Effective top tube | not listed | 520 | |
| BB drop | not listed | 72 | |
| Standover | not listed | not listed | |
| Seat tube length | not listed | 465 | |
| Head tube length | not listed | 120 |
Differences are the Giant Propel Advanced Pro (Di2) minus the Factor Ostro VAM SRAM Power Meter. Full charts: 2025 Factor Ostro VAM SRAM Power Meter, 2026 Giant Propel Advanced Pro (Di2).
Where each sits in its class
Factor Ostro VAM SRAM Power MeterGiant Propel Advanced Pro (Di2)
Each bike is ranked against the other road bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Factor Ostro VAM SRAM Power MeterSRAM Force w/ Power Meter | Giant Propel Advanced Pro (Di2)Advanced Pro 0 (Di2) |
|---|---|---|
| Frame | Factor Ostro VAM | Giant Propel |
| Fork | Factor OSTRO | not listed |
| Bottom bracket | CeramicSpeed T47A | not listed |
| Wheelset | Black Inc 48|58 | Giant SLR 1 50 Carbon Disc |
| Brake | Disc brake 160mm max rotor | Shimano Ultegra |
| Handlebar | Black Inc Integrated Aero Barstem | Giant Contact SLR Aero |
| Headset | CeramicSpeed SLT | not listed |
| Seatpost | Factor D-shaped carbon seatpost 0 and 20mm setback | Giant Vector |
| Shifter | not listed | Shimano Ultegra R8170 Di2 |
| Derailleur | not listed | Shimano Ultegra R8150 Di2 |
| Cassette | not listed | Shimano Ultegra |
| Chain | not listed | Shimano XT M8100 |
| Crankset | not listed | Shimano Ultegra Mid Compact |
| Tire | not listed | Cadex Road Race GC |
| Rotor | not listed | Shimano Ultegra |
| Stem | not listed | Giant Contact SL Aero |
| Grips | not listed | Stratus Lite 2.0 |
| Saddle | not listed | Giant Fleet SL |
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