Serk A30 “The Captain” Titanium All-Road Frameset

Description

The Captain –  A capable, adaptable, self-confident bike that’s just the right mix of on and off-road. The geometry is nimble enough to still have that race bike like feel while giving you a wide tyre option to explore new frontiers. Did we mention its built out of durable and tenacious 3AL/2.5V titanium and you can choose unique color options? We think we might just have a candidate for your ‘one bike for life’.

The thinking behind this bike was simple – fast AND capable enough.

Since the evolution of disc brakes on road bikes the capabilities of drop bar road bikes have increased infinitely. Removing the restrictions inherent with the reach and clearance of traditional rim brakes now means we can build bikes with larger clearances and better off-road capabilities. Our design brief was to take advantage of disc brakes to keep a fast road bike geometry with just enough capability off-road.

When we designed our first Serk Adventure bike in 2015 it was based around 35C tyres. Back then there wasn’t much else wider available in 700C and 35 was considered wide. We rode that bike in some really rough terrain and were blown away by the types of adventures that were possible with even 35C tyres.

If we could add 35C capability to our regular road bike without compromising its speed and handling extensively then this was our sweet spot for capability.

To have this capability and keep it fast we developed our own proprietary fork with just enough clearance but still retaining a relatively short (compared to most large tyre adventure bikes) axle to crown measurement. This keeps the front end low and tight and results in a fast handling bike. Out the back we lengthened the chain stays just enough to accommodate bigger tyres but not too much that the bike started to feel slow.

We’ve adopted T47 across the Serk Titanium line. The standard is here to stay and allows you to fit almost all the standard sized cranks on the market creak free. T47 is threaded which virtually eliminates bottom bracket creaking. It also allows for much easier service and installation.

We love the clean aesthetic of internal cabling. We hate complicated systems and heavy cast parts that add unnecessary weight to our bikes. We have a simple lightweight internal gear cabling system which can neatly accommodate di2 wiring by switching out the included di2 ports. The hydraulic hose is semi integrated – creating a clean look with simple port construction to minimize weight.

Our titanium rear hanger is cast from a solid piece of titanium block. Being removable means its possible to develop a new version in the future if a newer and better thru axle system is released in the years to come.

Specifications
Titanium 3Al/2.5V
Flat mount disc brakes
Rear 12x142mm
Clearance for 35mm tyres*
Di2 Integration & Swappable Ports
T47 Bottom Bracket
Front Derailleur Braze-On
Engraved Head-Badge
Serk Carbon All-Road Fork (12x100mm)
Serk Headset 40 Semi-integrated

Fork weight: 420g

Seatpost weight: 227g

Frame weight:

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

The A30’s geometry was designed to be fast, responsive and stable. The front end geometry has a similar road feel to our A10 pure race bike. To account for the longer axle to crown length (so we can fit bigger tyres) we reduced head tube lengths so that stack and reach match up across the road range.

To allow for greater tyre clearance out the back we lengthened the chain stays to 420mm to keep agile handling and allow for the flexibility of running larger tyres.

Additional information

Brand

SERK

Brand Name: Serk	Chinese Company Name: 北京速旷文化传播有限公司
Founded: 2011	# of Employees: -
Headquarters: Beijing	Products Categories: Complete Bikes, Framesets