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KOOTU BERSERKER GRX400 Gravel Bike: a 20-speed gravel bike crafted for avid adventurers, blending top-tier components with unmatched durability to deliver a smooth, responsive ride on any terrain

T800 grade carbon fiber gravel frame
GRX400 gravel bike comes with carbon fiber frame ,fork,seatpost,provide lightweight and durable cycling

High-end carbon fiber material
Experience unparalleled performance with our T800 grade carbon fiber gravel frame, expertly designed for maximum strength-to-weight ratio, exceptional versatility on diverse terrains, and a sleek, aerodynamic finish that promises both durability and style

Internal cable routing design
Experience a sleeker, clutter-free aesthetic and enhanced aerodynamics with our internal cable routing design, ensuring optimal protection and seamless performance

40C Continental Tires
Ride with confidence on 40C Continental Tires, guaranteeing superior grip, durability, and unmatched performance across diverse terrains
Shimano GRX Groupset
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SHIMANO ST-RX400
Experience the SHIMANO ST-RX400, merging gravel-inspired ergonomics and anti-slip brake levers with top-tier road system shifting, offering unparalleled mixed-terrain control in a single, seamless package
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SHIMANO FD-RX400
SHIMANO FD-RX400, a front derailleur revolution offering lighter shifting, ergonomic power curve, and cutting-edge link (toggle) construction for a natural feel,effortless adjustment precision, and versatile cable routing options.
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SHIMANO RD-RX400
SHIMANO RD-RX400, ensuring silent and consistent rear shifting on rugged terrains, complemented by an adjustable chain stabilizer, SHIMANO SHADOW RD+ technology, gravel-tuned clutch tension, switchable stabilizer
Collapsible content
Technical Speicfications
Model | KOOTU GRX-400 BERSERKER |
Frame material | T800 grade carbon fiber, KOOTU logo |
Fork material | T800 grade Carbon fiber, fork open 100mm |
Handlebar | Gravel 480*31.8mm, 40 degrees of flare |
Seatpost | T800 grade carbon fiber, 350mm |
Thru axle | Hollow type, front M12*100, rear M12*142 |
Wheels | Aluminum, 700c,30mm depth. |
Tires | 40C Continental Terra ShieldWall (40-622) |
Bottom bracket | GINEYEA BB51 |
Chain | KMC X10R |
Crank | SHIMANO FC-RX600, 46-30T(170MM) |
Shifting levers | SHIMANO ST-RX400 |
Front derailleur | SHIMANO FD-RX400 |
Rear derailleur | SHIMANO RD-RX400 |
Flywheels | SHIMANO CS-HG500 (11-13-15-17-19-21-23-26-30-34T) |
Disc rotor | SHIMANO SM-RT70,140MM |
Pedals | SANYUN LP-658A |
Saddle | YBT, PU-leather |
Size & Geometry
Recommend size chart:
Size | cm | ft |
50cm | 160-175cm | 5'2''-5'7'' |
52cm | 175-180cm | 5'7''-5'9'' |
54cm | 180-190cm | 5'9''-6'2'' |
For reference only, for specific size requirements, please check the frame size drawing for measurement before placing an order.
Geomety:

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