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2024 Factor

Ostro Gravel Frameset Premium

A carbon frame aero frameset with hydraulic disc brakes.

Manufacturer Price

$5,499
Weight2.1 lbs (frame)  
FrameCarbon
ForkCarbon
Wheels700c
BrakesHydraulic Disc
Where to Buy
Similar Bikes
Top Comparison
Insights
Sizing
49cm

5'1" – 5'5"

52cm

5'3" – 5'7"

54cm

5'5" – 5'9"

56cm

5'7" – 6'0"

58cm

5'10" – 6'2"

61cm

6'0" – 6'4"

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Factor Ostro stands out as a top-tier aero bike, blending aerodynamic efficiency with real-world usability. It's praised for its balanced stiffness and comfort, exceptional handling, and impressive performance in wind tunnel tests. While it excels in speed and responsiveness, some note its high price and race-oriented stiffness as potential drawbacks.

Pros
  • Exceptional aerodynamic efficiency

  • Balanced stiffness and comfort

  • Precise and sharp handling

  • Lightweight and responsive

  • Customizable fit options

Cons
  • High price point

  • Race-oriented stiffness may not suit all riders

  • Some components prone to wear or creaking

Key Quotes
The Factor OSTRO VAM is, quite simply, an excellent race bike.
Cycling News logoCycling News
All that for 7 watts?! But that’s a lot when it comes to an already super-aero bike.
Bikerumor logoBikerumor
the blend of stiffness, pin-sharp handling and refinement the Ostro offers is intoxicating
Cyclist logoCyclist

Feedback?

View all reviews

road.cc
Factor teams up with pro skateboarder Chico Brenes for the Ostro Gravel Chico Edition

Mar 2024 · Suvi Loponen

The collab tells the story of how cycling saved the career of pro skateboarder Chico Brenes – but what has that to do with the turquoise-browed motmot, the national bird of Nicaragua? All will be revealed…

Read Review

Bikerumor
From Nose to Tail: Factor OSTRO Gets Comprehensive Aero Upgrade

Feb 2024 · Jordan Villella

The bike that encompasses Factor and its presence worldwide is the OSTRO. It's the most recognizable of its offerings and just got an update.

Read Review

Gran Fondo Magazine
The 2023 Factor OSTRO Gravel in review - Our big gravel race bike shootout

Jun 2023 · Martin Staffa

Lightweight, comfortable, and aerodynamic: can the 2023 Factor OSTRO Gravel do it all? We put it through the wringer to find out!

Highs
  • Absolutely uncompromising race bike

  • CeramicSpeed bottom bracket

  • Feels fast

Lows
  • Lack of comfort – harshest bike on test

  • Creaking seat post clamp that comes loose

Read Review

BikeRadar
Factor Ostro Gravel review

Jun 2023 · Warren Rossiter

Race-ready, aerodynamic and made for gravel

Highs
  • Rapid

  • Put together beautifully

  • Brilliant specification

  • Stiff and responsive

Lows
  • Road derived geometry

  • Firm ride

Read Review

Road Bike Action
FACTOR OSTRO GRAVEL VS FELT BREED CARBON - GRAVEL BIKE SHOOTOUT - Road Bike Action

Feb 2023 · RBA Staff

A new generation of gravel race bikes

Highs
  • Felt: planted and in control, stable at high speeds

  • Felt: wide tire clearance (700x50mm)

  • Felt: multiple bottle cage mounts

  • Factor: excellent climbing performance

  • Factor: quick handling

  • Factor: light weight (17.78 lbs)

  • Factor: premium component spec

Lows
  • Felt: stiff Zipp 303S wheels; benefited from wheel swap

  • Felt: knee collision with rear brake hose during out-of-saddle climbing

  • Felt: seatpost-mounted water bottle difficult to access; side-load cage needed

  • Factor: stiff feedback from seatpost

  • Factor: lacked compliance for all-day efforts

  • Factor: internal routing complicated travel packing

  • Both: lacked compliance desired for long events like Unbound Gravel

Read Review

Cycling News
Factor Ostro Gravel review: Fast, stiff and racy, but at the expense of comfort and versatility

Feb 2023 · Will Jones

Crazy stiff, super aero, and a road bike position make life uncomfortable on rougher terrain

Highs
  • Very, very fast

  • Striking looks

Lows
  • Uncomfortable

  • Not as versatile as many modern road bikes

  • No mudguard mounts

Read Review

Bicycling
Factor's Fast, Furious Ostro Gravel Racer

Dec 2022

Factor uses its road-proven aero tricks to make a seriously fast gravel bike.

Highs
  • Good tire clearance

  • Lightweight and aero frame

  • Blends the feel of a road bike with gravel capabilities

  • Threaded bottom bracket

Lows
  • A little harsher than other gravel racers

  • Electronic shifting only

  • Internal routing can complicate simple adjustments

Read Review

Cyclist
Factor Ostro Gravel review

Nov 2022 · Sam Challis

A gravel bike you could take crit racing

Highs
  • Light weight

  • Fast but balanced handling

  • Rigidity

  • Spec attention to detail

Lows
  • Overly firm ride feel

  • Paint scheme options

Read Review

Geometry
Specs
Build
Frame

TeXtreme®, Toray®, Nippon Graphite® Pitch-Based Fiber

BB StandardT47, Threaded

Tire Clearance45c

ColorsUd Gloss; Heritage Blue; Olive Green; Prisma Paint (+$500.00)

Fork

OSTRO Wide Stance Fork

Bottom Bracket

CeramicSpeed T47a BB - Shimano

Headset

CeramicSpeed SLT 1.5″ bearings

Seatpost

0 and 20mm setback available

TypeRigid

Groupset
Brakes

Disc

TypeHydraulic Disc

Rider Notes
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First added May 13

Last updated November 30

Not listed for 554 days