Serk A21 "The Dissident" Titanium Gravel Frameset

We've now updated our carbon fork to have 3-pack mounts on fork legs for extra water bottles or cargo cages. Front of fork crown is also drilled for light mount.

The choice is yours - the A21 can handle them all.

Shifting degradation due to dirt and water ingress in your shift cable housing is one of the most frustrating things on a gravel bike. That's why we've painstakingly designed a 3D-cast titanium bottom bracket shell with integrated cable guides to make sure there is minimal exposure to the elements

With a full array of mounting points for full fender and rear rack, when you're not doing a solo adventure in the middle of nowhere, the A21 slots in perfectly as the daily driver. Commute in comfort and style

Provision for internally routed dropper post: droppers are fun, you'll be glad to have one when you are under-biked down some serious single track, or stopped at a traffic light on your commute home with a foot down, dreaming about your next big adventure

Years of experience touring and bikepacking has made us sensitive to the number and location of all mounting points on the bike. Hours have been spent dialing in the precise location of mounting points to ensure maximum real estate for bags and other accessories. Case in point: did we forget to put in a bento-box style mount on the top tube you might ask? That was left out deliberately. It's neither elegant in function nor appearance, and they always interfere with frame bag straps. No mounts here increases your flexibility.

Specifications
Titanium 3Al/2.5V
Flat mount disc brakes
Rear 12x142mm
Clearance for 700C x 45 / 650B x 55 tyres*
Di2 Integration & Swappable Ports
T47 Cast 1-Piece Bottom Bracket
Full internal cable routing
3 bottle cage mounts
Dropper post compatible (1x only)
Engraved Head-Badge
Serk Carbon Adventure Fork (12x100mm)
Adjustable Rake Flip-Chip
3-pack Mount
Internal Dynamo Wiring
Serk Headset 40 Semi-integrated
Serk Seatpost clamp

Fork weight: 550g

Seatpost weight: 227g

Frame weight:

NOTE: Sold as a frameset only (frame + fork + headset + seat collar + thru axles

Utilitarian Fork - carry more

We've now updated our carbon fork to have 3-pack mounts on fork legs for extra water bottles or cargo cages. Front of fork crown is also drilled for light mount.

1x or 2x

The choice is yours - the A21 can handle them all.

Fully Internal Cable Routing - better shifting

Shifting degradation due to dirt and water ingress in your shift cable housing is one of the most frustrating things on a gravel bike. That's why we've painstakingly designed a 3D-cast titanium bottom bracket shell with integrated cable guides to make sure there is minimal exposure to the elements

Mudguards and Rear rack mounts

With a full array of mounting points for full fender and rear rack, when you're not doing a solo adventure in the middle of nowhere, the A21 slots in perfectly as the daily driver. Commute in comfort and style

Dropper post

Provision for internally routed dropper post: droppers are fun, you'll be glad to have one when you are under-biked down some serious single track, or stopped at a traffic light on your commute home with a foot down, dreaming about your next big adventure

More is not always better

Years of experience touring and bikepacking has made us sensitive to the number and location of all mounting points on the bike. Hours have been spent dialing in the precise location of mounting points to ensure maximum real estate for bags and other accessories. Case in point: did we forget to put in a bento-box style mount on the top tube you might ask? That was left out deliberately. It's neither elegant in function nor appearance, and they always interfere with frame bag straps. No mounts here increases your flexibility.