FSA K-Wing AGX Carbon Gravel Handlebar – 31.8 mm - 420 mm
The FSA K-Wing AGX is a full-carbon drop handlebar for gravel, adventure and cyclocross riding: flared drops with a 25 mm offset for control on descents, sculpted hoods and drops for comfort, a 115 mm drop with 76 mm reach, and a 31.8 mm clamp that fits standard 31.8 mm stems. It comes in 420, 440 and 460 mm widths.
Why the FSA K-Wing AGX?
Flared drops. The drops bend outwards by 12° and sit 25 mm further out, which FSA says gives better control and clearance when descending. - Sculpted contact points. The hoods and the drops are shaped for ergonomics, so the hands stay comfortable in both riding positions.
115 mm drop, 76 mm reach. A compact shape with a 10° forward angle and a 5 mm rise, built on FSA's popular K-Wing ergonomics. 
ACR and SCR compatible. FSA lists the bar as compatible with its Aerodynamic integrated Cable Routing (ACR) and Semi-integrated Cable Routing (SCR) systems. 
Room for Di2 cables. The extra wide internal cable grooves are compatible with Shimano Di2 shifting groups, according to FSA. 
Full carbon, light. The bar is made entirely of carbon and weighs 205 g in the 420 mm width (FSA figure), with reinforced, textured clamping areas.
The shape in numbers
FSA gives the K-Wing AGX a 115 mm drop and 76 mm reach, a 12° outward bend of the drops with a 25 mm offset, a 10° forward angle and a 5 mm rise. The wider stance in the drops is meant to make the bike easier to steer and to give more clearance on loose, steep descents, while the compact reach keeps the position manageable on long days.
Who is it for?
- Gravel riders. Who want a light full-carbon bar with comfortable hoods and controlled drops.
- Adventure and bikepacking riders. Who spend long days on the bike and value ergonomic contact points.
- Bike builders and upgraders. Who are looking for a carbon drop bar with a 31.8 mm clamp and internal cable routing for a gravel or cyclocross bike.
FSA K-Wing AGX sizes and specifications
| 420 mm | 440 mm | 460 mm | |
|---|---|---|---|
| FSA part number | 185-0021013030 | 185-0021014030 | 185-0021046030 |
| Clamp diameter | 31.8 mm | ||
| Drop | 115 mm | ||
| Reach | 76 mm | ||
| Drop offset | 25 mm | ||
| Outward bend | 12° | ||
| Forward angle | 10° | ||
| Rise | 5 mm | ||
| Weight | 205 g (FSA figure) | not stated by FSA | |
| Material | Full carbon | ||
| Colour | Black with black and silver graphics | ||
| Cable routing | ACR and SCR compatible | ||
Frequently asked questions
Which widths does the FSA K-Wing AGX come in?
FSA offers 400, 420, 440, 460 and 480 mm. We carry 420, 440 and 460 mm; pick the width in the variant selector on this page. Each width has its own FSA part number (185-0021013030, 185-0021014030 and 185-0021046030).
Which stem does it need?
A stem with a 31.8 mm bar clamp. Carbon bars should be installed according to the manufacturer's instructions and tightening torque. If you are not sure which stem suits your bike, ask us before you order.
Does it work with internal cable routing?
FSA lists the K-Wing AGX as compatible with its ACR (Aerodynamic integrated Cable Routing) and SCR (Semi-integrated Cable Routing) systems, and its wide internal grooves take Shimano Di2 cables. Whether it suits your bike also depends on the stem and frame, so ask us if you are planning an internal routing build.
Is it a road bar or a gravel bar?
It is made for adventure, gravel and cyclocross. The flared drops give a wider stance and more clearance on rough descents than a classic road drop bar.
Are tape, stem or levers included?
No. The listing is the handlebar only. Bar tape, stem and brake levers are sold separately.
About FSA
FSA – Full Speed Ahead has made bicycle components since 1993 and introduced the compact road crankset in 2004. AGX is FSA's product line for adventure, gravel and cyclocross, and the K-Wing AGX is its full-carbon gravel handlebar built on the popular K-Wing ergonomics.