








2023 KOOTU BERSERKER GRX-400 Carbon Gravel Bike 20 Spd
Looking for a high-performance carbon gravel bike that can handle any terrain? Look no further than the KOOTU BERSERKER GRX-400. This top-of-the-line bike boasts a lightweight carbon frame, a powerful Shimano GRX-400 drivetrain, and rugged, versatile tires that are perfect for gravel, dirt, and pavement. Whether you're racing, touring, or exploring off-road, the KOOTU BERSERKER is the ultimate choice for serious cyclists.
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Bicycle components:
Frame Size: | 47cm/51cm/54cm/56cm |
Wheel Size: | 700C |
Color: | Black white/Black gold |
Specification:
Frame Material: | T800 carbon fiber |
Fork: | T800 carbon fiber, fork open 100mm |
Handlebar: | Aluminum alloy |
Stem: | Aluminum alloy |
Saddle: | YBT, PU-leather |
Seat Post: | T800 carbon fiber, 350mm |
Derailleur / Brake System:
Shift lever: | SHIMANO ST-RX400 |
Front Derailleur: | SHIMANO FD-RX400 |
Rear Derailleur: | SHIMANO RD-RX400 |
Flywheel: | SHIMANO CS-HG500 (11-13-15-17-19-21-23-26-30-34T) |
Crank: | SHIMANO FC-RX600, 46-30T(170MM) |
The standard brake setting is Left hand control front brake, Right hand control rear brake, if you want to change, please let us know.
Transmission Control System:
Chain: | KMC X10R |
Pedal: | SANYUN LP-658A |
Wheelset System:
Wheelset: | Aluminum, 700c,30mm depth |
Tires: | Continental Terra ShieldWall (40-622) |

Shimano GRX Shifting
Professional drop handlebar, with special anti-slip paint on the lever, bring you comfortable and smoothy gear shifting experience.

Full Internal Cable Route
Internal cable route design, so that the appearance of the frame more neat, while reducing wind resistance.

Front Derailleur
The FD-RX400 impresses with a natural shifting stoke feeling and its smooth-running functionality which is characterized by a very ergonomic power curve as well as the integration of a cable tension adjustment function.

Rear Derailleur
Characterized by quiet, smooth, precise and reliable shifting even in the most demanding terrain. When activated the rear derailleur pivot takes a firm hold to reduce excessive movement, noise and general "chain chatter".

Shimano RS470 HUB
High performance, seal bearing with good Lubrication.

Shimano HG500 Cassette
Flywheel with chain retention technology for sharp shifting.

"WHY NOT ME"
Starting from the needs of riders, we are committed to providing riders with "professional carbon bikes with cost performance".