Bikes up to 60% offWe monitor over 40,000 bikes daily to find the best prices
Today’s Deals2023 Factor
Ostro Gravel
A carbon frame aero bike with hydraulic disc brakes.
Manufacturer Price
$5,499| Frame | Carbon |
|---|---|
| Fork | Carbon |
| Wheels | 700c Aluminum |
| Brakes | Hydraulic Disc |
5'1" – 5'5"
5'3" – 5'7"
5'5" – 5'9"
5'7" – 6'0"
5'10" – 6'2"
6'0" – 6'4"
🐐 Estimated
None yet.
Do you have this bike? Help other riders make a decision about which size will work for them by sharing your own size and fit notes.
Summary
The Factor Ostro is an aero-focused gravel race bike designed for speed and performance on smooth terrain. It excels in stiffness, aerodynamics, and handling, making it a top choice for racing and fast rides. However, it sacrifices comfort and versatility, with a firm ride that can be harsh on rough surfaces and limited utility for diverse conditions.
Incredible aerodynamics
High stiffness for efficient power transfer
Superior handling on smooth terrain
Lightweight construction
Premium componentry and build quality
Firm and uncomfortable ride, especially on rough terrain
Lacks versatility for off-road or all-day comfort
Quick steering can be unstable on technical descents
High price point for a specialized machine
Limited utility features like mudguard mounts
developed to dominate its category with incredible aero, superior handling, high stiffness and low weight
BikeRadarOn smooth, well-graded gravel it is like being shot out of a cannon.
Cycling NewsIt’s a gravel bike for race day, designed with winning in mind through and through.
Gran Fondo MagazineFeedback?
View all reviews
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…
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.
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!
Absolutely uncompromising race bike
CeramicSpeed bottom bracket
Feels fast
Lack of comfort – harshest bike on test
Creaking seat post clamp that comes loose
Jun 2023 · Warren Rossiter
Race-ready, aerodynamic and made for gravel
Rapid
Put together beautifully
Brilliant specification
Stiff and responsive
Road derived geometry
Firm ride
Feb 2023 · RBA Staff
A new generation of gravel race bikes
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
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
Feb 2023 · Will Jones
Crazy stiff, super aero, and a road bike position make life uncomfortable on rougher terrain
Very, very fast
Striking looks
Uncomfortable
Not as versatile as many modern road bikes
No mudguard mounts
Dec 2022
Factor uses its road-proven aero tricks to make a seriously fast gravel bike.
Good tire clearance
Lightweight and aero frame
Blends the feel of a road bike with gravel capabilities
Threaded bottom bracket
A little harsher than other gravel racers
Electronic shifting only
Internal routing can complicate simple adjustments
Nov 2022 · Sam Challis
A gravel bike you could take crit racing
Light weight
Fast but balanced handling
Rigidity
Spec attention to detail
Overly firm ride feel
Paint scheme options
| Frame | TeXtreme®, Toray®, Nippon Graphite® Pitch-Based Fiber BB Standard: T47, Threaded Tire Clearance: 45c |
|---|---|
| Fork | OSTRO Wide Stance Fork |
| Bottom Bracket | CeramicSpeed T47A Aluminium cups / CeramicSpeed bearings with Wheels MFG 24mm BBRight Reducers / Adapters |
| Headset | CeramicSpeed SLT 1.5" bearings |
| Seatpost | 0 and 20mm setback available Type: Rigid |
| Brakes | Hydraulic disc Type: Hydraulic Disc |
|---|
| Rims | 700c |
|---|
First added March 9
Last updated March 18
Not listed for 1,168 days