Gravel
Stainless Steel 2205
Overview Features Details

M3 is high-performance seamless tubing developed by RIKULAU using S32205 duplex stainless steel. First introduced in Sweden in the 1930s, duplex stainless steel combines two metallurgical phases, austenite and ferrite, to deliver high strength, excellent corrosion resistance, and outstanding fatigue resistance. These qualities make it widely used in demanding applications such as marine engineering, chemical processing equipment, and pressure vessels.

Compared with conventional austenitic stainless steel, M3 offers tensile strength of approximately 1100 MPa and significantly greater corrosion resistance than common 304 and 316 stainless steels. It combines stiffness, durability, and reliability with a ride character distinctly different from traditional steel.

M3 was not created to build the lightest or fastest race bike. Its purpose is lasting dependability on long journeys and in demanding conditions.

From long-distance touring, gravel exploration, and all-weather commuting to rain, mud, and changing conditions, M3 keeps you moving with solid, stable handling, refined yet direct road feedback, and exceptional durability in challenging environments.

It may not be the most eye-catching choice on a specification sheet, but it is a bike you will still want to ride for years to come.
The M3 Gravel series builds on RIKULAU’s approach to exploration, seamlessly connecting paved roads, forest trails, gravel, and paths yet to be discovered.

The high-strength frame delivers stable, solid handling feedback, while the distinctive character of stainless steel complements the understated paintwork, expressing the enduring beauty of metal craftsmanship.

For RIKULAU, M3 is more than another material. It is a riding choice you can trust for years to come. Its purpose is to accompany riders across different roads and toward ever more distant horizons, rather than chase a fleeting burst of speed.
Seamless Integration

A head tube with a 47.8 mm internal diameter paired with a 1-1/2-inch tapered fork increases front-end stiffness and stability at speed. The generous head tube space also supports modern fully internal cable routing, concealing cables from the handlebar and stem for a clean appearance, aerodynamic performance, and convenient everyday maintenance.
Ready for the Journey

Rack mounts on the seatstays and an optional carbon fiber fork with rack mounts provide greater carrying flexibility. Whether for long-distance touring, daily commuting, or multi-day bikepacking trips, you can tailor the carrying system to your needs.

Bottom Bracket Stiffness and Compatibility

The T47 bottom bracket standard combines a large-diameter shell with a threaded interface, increasing stiffness around the bottom bracket while retaining the easy maintenance and servicing of a threaded system. The larger shell also offers greater compatibility with cranksets and bottom bracket systems, enhancing power transfer and overall ride performance.

XS S M L XL XXL
Reach 358 365 375 388 393 400
Stack 528.7 543 556 572.1 591 610
Seat Tube 430 470 500 530 560 600
Effective Top Tube 509 521 540 557 574 586
Head Tube 90 104 118 133 153 173
Head Tube Angle 70.5 71 71 71.5 71.5 71.5
Seat Tube Angle 74 74 73.5 73.5 73 73
Bottom Bracket Drop 73 73 73 73 73 73
Chain Stay 435 435 435 435 435 435
Wheel Base 1001 1008 1023 1036 1048 1061
Standover 726 753 772 795 817 846
Front Center 577 584 599 612 623 637
Rake 50 50 50 50 50 50

Frame Material
M3 S32205 duplex stainless steel
Bike Category
Gravel
Fork
BLK TEC GF4 carbon fiber fork (version with rack mounts available)
Headset
FSA No.13 / 12B / 44 / ICR
Head Tube Specification
1 1/2", external cup
Bottom Bracket
T47 68mm
Rear Dropout
UDH
Brake Mount
Flat Mount
Cable Routing
Available with fully internal or external cable routing
Seatstay Rack Mounts
Yes
Standard Tire Size
700×38C
Maximum Tire Clearance
50C
Wheelset
DT Swiss GR 1600 Spline
Tires
MAXXIS Rambler 700×38C
Thru-axles
Front 12×100 mm / Rear 12×142 mm
Drivetrain (Mechanical Shifting)
Shimano GRX RX820
Drivetrain (Electronic Shifting)
Shimano GRX Di2 RX825
Gearing
2×：48-31T／11-36T
Brake Calipers
Shimano BR-RX820
Disc Rotors
Center Lock, 160 / 160 mm
Stem
Vision SMR
Handlebar
FSA A-Wing AGX
Bar Tape
3 mm PU bar tape (black)
Seatpost
FSA Energy SB20・27.2 mm
Seatpost Clamp
CNC-machined aluminum
Saddle
Novus Boost Evo Superflow
Pedals
Not included

Titanium Fork
Road: 700×32C / Gravel: 700×45C, fully internal cable routing
Titanium Stem
Compatible with fully internal cable routing
Titanium Seatpost
27.2×350 mm，offset 25 mm
Titanium Crankset
Q-Factor 148 mm
Titanium Clamp
Replaces the standard CNC-machined aluminum seatpost clamp
BLK TEC Carbon Fiber Seatpost
S6
BLK TEC Integrated Carbon Fiber Handlebar
R8 / G8 / L8 (R8 also available with a bike computer mount)
Carbon Fiber Bottle Cage
-
For available frame finish options (sandblasting, brushing, anodizing, laser engraving, and custom signatures) and geometry customization, please see the customization guide.

Frame Warranty
Five years (invoice required)
Component Warranty
One year for non-wear components