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Factor OSTRO VAM vs Rose Shave FFX
Pick up to 4 bikes. Rows line up component by component. Highlighted rows differ, and green marks the best value where lower or higher is clearly better.
Key differences
- The Rose Shave FFX starts €3,399 cheaper (€8,000 vs €11,399 for the Factor OSTRO VAM).
- Our verdict scores the Rose Shave FFX higher overall: 81/100 vs 77/100.
- Tire clearance: up to 32 mm on the Factor OSTRO VAM vs 35 mm on the Rose Shave FFX.
- The Factor OSTRO VAM comes in 7 sizes, the Rose Shave FFX in 6.
Factor OSTRO VAM
Rose Shave FFX
| FactorOSTRO VAM | RoseShave FFX | |
|---|---|---|
| Overview | ||
| Brand | Factor | Rose |
| Build | OSTRO VAM SRAM Red w/ Power Meter | Shave FFX Dura Ace Di2 |
| Build notes | Barstem width and stem length, crank length, seatpost setback, frame colour and wheel decal colour are chosen at order. Prisma custom paint costs USD 600 extra. | Colours ghost pearl and liquid racing green. Rose quotes about 6.6 kg (±5 %) for the Shave FFX in size M, liquid racing green, without pedals, on its product pages, but 'from 6.8 kg' on the model page, so no build weight is recorded. Rose's UK site doesn't list the Shave FFX, so there is no GBP price. The 4iiii power meter's model isn't named beyond being dual-sided. |
| Price (MSRP) | €13,699$12,599€13,699 | €8,000€8,000€8,000 |
| Model year | 2024 | 2026 |
| Generation | 2nd generation | First generation (2026) |
| Launched | 2024-02 | 2026-02 |
| Discipline | Aero road | Aero road |
| UCI legal | Not stated | Yes |
| Verdict (out of 100) | ||
| Overall score | 77 | 81 |
| Aero | 84 | 86 |
| Frame | 92 | 92 |
| Components | 90 | 90 |
| Fit | 86 | 80 |
| Practicality | 66 | 68 |
| Price | 44 | 67 |
| Frame & fork | ||
| Frame material | Carbon (TeXtreme, Toray and Nippon Graphite pitch-based fibre) | Carbon (Toray M40X layup, FFX grade) |
| Fork material | Carbon; OSTRO wide-stance fork | Carbon (Shave FFX fork) |
| Frame weight | 820 g28.9 oz | 795 g28 oz |
| Weight measured on | Size 54, painted (Factor launch press release); Factor's current spec sheet lists 900 g | Frame, size M, liquid racing green, as claimed by Rose (±30 g) |
| Max system weight | — | 110 kg242.5 lb |
| Frame sizes | 45, 49, 52, 54, 56, 58, 61 | XS, S, M, M/L, L, XL |
| Colours | Icon Blue, Geometric, White Chrome, Gloss Chrome, Black, Arctic Chrome, Terracotta Orange; custom Prisma paint at extra cost | ghost pearl, liquid racing green |
| Also available as | — | Shave FF, the lower carbon grade of the same race frame (850 g claimed in size M per bike-x): Ultegra Di2 €5,600, Force AXS €5,900; plus the more relaxed endurance Shave |
| UCI frame approval | — | On the UCI list of approved framesets as 'SHAVE FFX' with fork 'XLITE FFX', sizes XS-XL (6), approved 25 Sep 2025, code ROSE-SHAVEX (UCI list version 2026.10.02) |
| Compatibility & standards | ||
| Brake type | Disc, max rotor 160 mm front and rear | Hydraulic disc |
| Max rotor size | 160 mm | — |
| Wheel size | 700c | 700c |
| Max tire width | 32 mm | 35 mm |
| Bottom bracket standard | T47A (CeramicSpeed T47A aluminium cups; bearings for DUB, 24 mm or Ultra-Torque spindles) | BB86 press-fit |
| Front axle | 12x100 thru-axle | 12x100 thru-axle |
| Rear axle | 12x142 thru-axle | 12x142 thru-axle |
| Drivetrain compatibility | Electronic only, max chainring 54T | Complete builds use Shimano Dura-Ace Di2 and SRAM Red AXS 2x12 |
| Mechanical shifting possible | No | — |
| Max chainring | 54T | — |
| Cable routing | Internal | Internal through the cockpit |
| Electronic battery location | Inside the seat tube, fitted from behind the bottom bracket (no need to remove the seatpost) | — |
| Hydration & storage | ||
| Bottle mounts | 2 | — |
| Bottle mount locations | Down tube and seat tube, with location-specific Black Inc aero bottle cages included | — |
| Fit & adjustability | ||
| Cockpit | One-piece bar and stem (Black Inc Integrated Aero Barstem) | Fully integrated Rose Shave carbon aero cockpit (Rose doesn't say on its product pages whether bar and stem are one piece) |
| Clip-on aerobars possible | — | Yes |
| Seatpost type | OSTRO VAM aero seatpost, 15 mm wide, 0 or 20 mm setback; pusher-type clamp at the back of the seat tube | Rose aero carbon seatpost (D-shaped), 0 mm offset |
| Fit notes | The barstem is chosen at order in 36, 38, 40 or 42 cm widths and 80 to 140 mm stem lengths (10 mm steps), with 80 mm reach and 120 mm drop; the drops flare by 30 mm. Factor also offers the Integrated Aero Barstem with Extensions (AB03) as an upgrade. Saddle rail clamps take 7x7 and 7x9 rails. A 45 cm size was added and the seat-tube angle is 0.5° steeper than before. | The cockpit has narrow hoods and 13° of flare in the drops, with stock widths of 350-390 mm and stems of 100-120 mm by size; Rose leaves room on it for a computer mount and a time-trial bar. Bikes ship with 20 mm of spacers under the cockpit. |
| Aerodynamics | ||
| Manufacturer aero claims | 70 g less drag (a 7 W saving) than the previous OSTRO VAM frame; Factor says it outperforms its rivals in the wind tunnel | 205 W at 45 km/h in TOUR's wind tunnel (size M/L with RC55 wheels and 28 mm Schwalbe Pro One Aero), 10 W less than the Rose Xlite 06 (215 W) — figures Rose quotes for the Shave FFX |
| Testing method | CFD simulations of dozens of head tube profiles (Rapid Iterative Design), then rapid prototypes verified in the wind tunnel and real-world testing | TOUR wind tunnel test at 45 km/h |
| Tube profile | Airfoil-type profile along the frame's waterline; 15 mm wide seatpost shaped for the airflow off the rider's legs | — |
| Travel, maintenance & warranty | ||
| Headset bearings | 1-1/8 in upper and 1-3/8 in lower bearings | — |
| Derailleur hanger | — | UDH (SRAM Universal Derailleur Hanger) |
| Maintenance | The threaded T47 bottom bracket takes CeramicSpeed bearings. The Di2 battery is reached from behind the bottom bracket rather than through the seatpost, so the saddle height isn't disturbed. | — |
| Proprietary parts | One-piece Black Inc barstem, OSTRO VAM seatpost and clamp, location-specific bottle cages | Shave cockpit, aero seatpost, optional Shave-specific carbon bottle cages |
| Frame warranty | Limited lifetime warranty | — |
| Sold via | Direct from factorbikes.com and through retailers | Direct from Rose (online and Rose stores) |
| Drivetrain | ||
| Groupset | SRAM Red eTap AXS | Shimano Dura-Ace Di2 R9200 |
| Launched | 2019 · replaced by SRAM Red AXS E1 (2024) | 2021 · current generation |
| Speeds | 12-speed | 12-speed |
| Electronic | Yes | Yes |
| Wireless | Yes | — |
| Drivetrain | 2x | 2x |
| Shifters | — | Shimano Dura-Ace Di2 ST-R9270 |
| Notes | — | Combined shift and hydraulic brake levers |
| Crankset | SRAM Red AXS Power Meter | Shimano Dura-Ace R9200 |
| Chainrings | 48/35 | 52/36 |
| Crank length | 165 / 170 / 172.5 (chosen at order) | — |
| Crank lengths available | — | 165 mm (XS-S), 170 mm (M), 172.5 mm (M/L), 175 mm (L-XL) |
| Power meter | SRAM Red AXS Power Meter | 4iiii Precision (dual-sided) |
| Measurement | — | Dual-sided |
| Front derailleur | — | Shimano Dura-Ace Di2 R9250 |
| Rear derailleur | — | Shimano Dura-Ace Di2 R9250 |
| Cassette | SRAM Red AXS | Shimano Dura-Ace R9200 |
| Range | 10-33 | 11-34 |
| Speeds | 12-speed | 12-speed |
| Chain | — | Shimano CN-M9100 |
| Brakes | ||
| Brake calipers | — | Shimano Dura-Ace BR-R9270 |
| Type | — | Hydraulic disc |
| Rotors | 160 mm rotors | — |
| Front rotor | 160 mm | — |
| Rear rotor | 160 mm | — |
| Wheels & tires | ||
| Wheelset | Black Inc 48|58 | Rose RC55CS VONOA |
| Front rim depth | 48 mm | 55 mm |
| Rear rim depth | 58 mm | 55 mm |
| Internal rim width | 23 mm | 23 mm |
| Material | Carbon rims, carbon spokes | Carbon |
| Rim bead | Mini hook | — |
| Spokes | — | VONOA carbon spokes |
| Weight | — | 1,280 g2.82 lb |
| Notes | Black or silver decals, chosen at order | Rose says the front rim is wider and the rear narrower; 1,280 g claimed for the pair. The Shave FFX is the only Shave with carbon spokes. |
| Tires | — | Schwalbe Pro One Aero |
| Tire width | — | 28 mm |
| Notes | — | Pro One Aero Front Evo (front) and Pro One Rear Evo (rear), Super Race casing, RaceGuard |
| Cockpit | ||
| Handlebar | Black Inc Integrated Aero Barstem | Rose Shave Cockpit |
| Type | One-piece bar and stem | Integrated carbon aero cockpit |
| Integrated stem | Yes | — |
| Widths available | 36, 38, 40, 42 cm | 350 mm (XS-S), 370 mm (M-M/L), 390 mm (L-XL); stem 100-120 mm by size |
| Bar reach | 80 mm | — |
| Bar drop | 120 mm | — |
| Flare | — | 13° |
| Cable routing | — | Internal |
| Material | — | Carbon |
| Notes | Stem length 80-140 mm in 10 mm steps, chosen at order; drops flare by 30 mm | — |
| Saddle & seatpost | ||
| Saddle | — | Selle Italia SLR Superflow S3 |
| Seatpost | Factor OSTRO VAM Seatpost | Rose Shave aero carbon seatpost |
| Offset / setback | 0 mm or 20 mm setback, 350 mm long | 0 mm |
| Material | Carbon | Carbon |
| Bar tape | — | Rose Gel-Comfort |
| Included extras | ||
| Pedals | — | None included |
| Bottle cages | Black Inc Aero Integrated Bottle Cages | — |
| Geometry (smallest – largest size) | ||
| Sizes | 45, 49, 52, 54, 56, 58, 61 | XS, S, M, M/L, L, XL |
| Rider height min | — | 155–191 cm5′1″–6′3″ |
| Rider height max | — | 166–200 cm5′5″–6′7″ |
| Stack | 502–611 mm19.8–24.1″ | 515–616 mm20.3–24.3″ |
| Reach | 360–409 mm14.2–16.1″ | 375–430 mm14.8–16.9″ |
| Seat tube angle | 73.5–75.5° | 73.5–75.5° |
| Head tube angle | 71.1–73.3° | 71.5–73.8° |
| Head tube length | — | 110–205 mm4.3–8.1″ |
| Effective top tube | — | 508–612 mm20–24.1″ |
| Seat tube length | 432–554 mm17–21.8″ | 435–575 mm17.1–22.6″ |
| Chainstay | 405–410 mm15.9–16.1″ | 410 mm16.1″ |
| Wheelbase | 969–1,022 mm38.1–40.2″ | 969–1,038 mm38.1–40.9″ |
| BB drop | 70–72 mm2.8–2.8″ | 72 mm2.8″ |
| Fork length | — | 370 mm14.6″ |
| Fork offset | 43–57 mm1.7–2.2″ | 44 mm1.7″ |
| Trail | 58–58.6 mm2.3–2.3″ | 55–66 mm2.2–2.6″ |
| Standover | 726–840 mm28.6–33.1″ | 735–854 mm28.9–33.6″ |
| Saddle height max | — | 690–890 mm27.2–35″ |
| Wheel size | — | 700c |
| Crank length | — | 165–175 mm6.5–6.9″ |
| Stem length | — | 100–120 mm3.9–4.7″ |
| Handlebar width | — | 350–390 mm13.8–15.4″ |
Geometry overlay
Pick a size for each bike to see frames and arm-pad ranges on top of each other.
Drawn to scale (how to read it).