Are you looking for a Tsunami Seaboard CX05 gravel bike frame with a classic aura made of steel but not too heavy and supported with modern parts. The Tsunami Seaboard CX 05 frameset only weighs 1.75kg, with a tapered carbon fork, ready to be installed with modern parts, here’s the review.
Gravel bikes have become very popular in recent years, and popularity often brings with it the need for versatility. The Seaboard CX 05 is a performance steel gravel Bike frame designed to get you to the finish line covered in mud and still comfortable enough to be your ride home, so you can rain down what’s left of the race. The bike that can get you anywhere as fast as your feet can go is the Seaboard CX. With eyelets on the back for shelves and a mudguard, this is a commuter’s dream come true.

Tsunami Seaboard CX05
Specifications
the CX05 TIG frameset contains all high-end steel gravel features – lightweight, high stiffness, excellent welding detail. The CX05 Steel touring bike frameset employs custom-shaped Crom R725 triple-butted tubes, with all decent tig hand welding joint, conical CNC’d head tube, and carbon fiber fork.
All framesets include a frame, a lugged steel fork, A Headset.
- CROM R750 tube set
- Aero heat-treated tubing
- Mirco-TIG welding
- A-head set type: integrated type 1 -1/8″, EC 34/28.6, 45°
- Seat post: 27.2 mm
- Bottom bracket: BSA / 68mm (English)
- Suitable for front and rear Disc brake
- Tire clearance: up to 42c.
- Weight: frame: 2,150g (Size 47), lugged steel fork:850g.
Chromoly Steel Frame
Chromoly Steel is one of best bicycle frameset material as it has a low alloy steel containing chromium, molybdenum, iron, carbon, and other alloying elements.
The addition of chromium to steel improves strength and corrosion resistance and the molybdenum increases material toughness.
– Chromoly tubing has a smooth interior and exterior finish that resists scaling and oxidation.
– Excellent strength-to-weight ratio
– High tensile strength, ductility, and toughness
– Lighter and stronger than carbon steel
– Easy to weld, form, and machine
– Ability to case harden using carburization
– Ability to harden using heat treating or work hardening
CROM R750 triple-butted tube set
Crom-R750 steel tube maks a pure racing steel frame that took full advantage of the latest advances in high tech steel tubing manufacturing.
By using Our triple-butted CROM R725 tubing and tapered carbon fork, our Seaboard FG03 has all high-end track frameset’s element: lightweight, high stiffness and extraordinary handling abilities.
Headtube
Conical CNC’d head tube
One of the main advantages of using this type of tube is, increasing the level of precision when turning and increasing comfort when cycling. The front frame that uses this tube type has also increased in terms of resistance, and reduces the risk of cracking at the headtube connection.
Internally Cable Routed
To maintain a neat impression, cable routing is made inside the frame, there are also many advantages, such as making it easier to change brake or shifter cables and easy to adjust.
Integrated Headset
Type 1 -1/8″, EC 34/28.6, 45° (Requires Press-fit Tool to install)
The Tsunami Seaboard CX 05 uses an integrated Headset type, the advantage is that it looks slimmer because you don’t need a cushion cup; the bearing just falls into the head tube.
You save a few grams because of the lack of cups.
All things being equal, your stack height will be lower. It is also the easiest to service.
Thru Axle
Thru-axles increase the rigidity of the wheel-frame interface and allow more accurate wheel placement. This is particularly important for brake discs, where small pad clearances mean that a slight misalignment will cause rubbing. They also eliminate the risk of the wheel coming loose from the quick-release dropouts.
Micro TIG Welding
Some welding methods leave slag once they are finished, so that the finished product looks sloppy. This will also waste time as the welder will have to clean away the slag to make their product or welding job presentable. TIG welding is very clean and will leave no slag at all, so the welder can concentrate on welding instead of cleaning up the metal.1
Aero heat-treated tubing
Heat-treating is applied and the properties in the alloy are changed which can align different parts creating a stronger bond which then makes the material stronger throughout and able to withstand higher tolerances from impacts and stress put on it from riding.
Seat post: 27.2 mm
Bottom bracket: BSA / 68mm (English)
Suitable for front and rear brake
Tire clearance: up to 42c.
Weight: frame: 1,750g (Size 47), Carbon fork:350gT
Geometry

Where To Buy
SINGAPORE
3 Ang Mo Kio Street 62,#06-06, Singapore 569139
CANADA
Atelier Olympia
514-995-8439
5524 Rue Saint Patrick, Suite 310
H4E1A8, Montreal, QC, CA.
https://www.atelierolympia.com/
Tsunami Seaboard CX01

Specifications
The CX01 TIG is TSUNAMI’s latest high-performance steel touring bike frame.
This Steel touring bike frameset employs custom-shaped Crom R725 triple-butted tubes, conical CNC’d head tube, and lugged vintage fork.
We focus on every detail on the frameset, tig welding for all joints as you can see from the display photo.
By size 47 frameset, We make it to 2150g even lighter than Aluminum alloy tube frameset.2
We can say that this is probably the lightest weight steel touring bike in the world.
All framesets include a frame, a lugged steel fork, A Headset.
- CROM R750 tube set
- Aero heat-treated tubing
- Mirco-TIG welding
- A-head set type: integrated type 1 -1/8″, EC 34/28.6, 45°
- Seat post: 27.2 mm
- Bottom bracket: BSA / 68mm (English)
- Suitable for front and rear brake
- Tire clearance: up to 42c.
- Weight: frame: 2,150g (Size 47), lugged steel fork:850g.
Steel Vintage Fork
The CX01 TIG is TSUNAMI’s latest high-performance steel touring bike frame.
This Steel touring bike frameset employs custom-shaped Crom R725 triple-butted tubes, with all decent tig hand welding joint, conical CNC’d head tube, and lugged vintage fork.
