Serk Titanium A21

The Dissident – your magic carpet ride for when the pavement ends. Ultimate dependability in 3Al/2.5V titanium tubing and tyre clearance for up to 650b x 55mm, this is the go anywhere and do anything bike. Combined with a one-piece 3D-cast T47 BB shell, all cables and housing are neatly routed internally so you will never have to worry about dirt or water getting into your cables again (we know, we’ve been there). This is the bike for you if you constantly find yourself strapping stuff onto your bike and escaping the tyranny of the city.
 

Titanium frames for new frontiers

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.

S

 M

 L

 XL

REACH

364 377 390 403

STACK

548 575 597 619

A

SEAT TUBE LENGTH
485 510 535 560

B

TOP TUBE LENGTH
523 549 569 594

C

HEAD TUBE LENGTH
110 139 164 188

D

SEAT TUBE ANGLE
74 73.5 73.5 73

E

HEAD TUBE ANGLE
70 70 70 70
F
BB DROP
75 75 73 73
G
CHAINSTAY LENGTH
430 430 430 430

H

WHEELBASE
1008 1030 1052 1073

I

FORK OFFSET
45 45 45 45

J

FRONT CENTRE
589 612 633 654