The Chiru X-Root embodies the excellence of titanium in the service of versatility. Designed by the French brand Chiru Bikes, this All-Road titanium Grade 9 frame (3Al/2.5V) is positioned midway between road endurance and sporty gravel, offering a unique behavior that combines vertical compliance, lateral stiffness and exceptional durability. With its horizontally ovalized chainstays — Chiru's technical signature — and geometry designed for long distances, the X-Root is the ideal companion for demanding cyclists seeking road adventures, rolling paths and gravel trails.

Technical highlights

• Cold-formed Grade 9 titanium: Noble material offering an excellent stiffness/comfort ratio, optimal corrosion resistance and unmatched longevity. Frame weight of only 1690 g in size M.
• Horizontally ovalized chainstays: Chiru innovation guaranteeing maximum lateral stiffness for optimal power transfer, while preserving vertical flex to absorb vibrations.
• Seatstays attached to the top tube: Configuration borrowed from the Chiru Kunlun, enhancing vertical comfort on long distances and irregular terrain.
• Oversized T47 bottom bracket: Guarantees pedaling stiffness, bearing protection and allows internal cable routing.
• SRAM UDH derailleur hanger: Universal standard facilitating adjustments, replacements and compatibility with all types of modern drivetrains (Shimano, SRAM, Campagnolo).
• Tire versatility: Compatible with 700c up to 40 mm (even 44 mm depending on models) or 650b up to 48 mm, allowing the bike to be adapted to all uses.

All-Road geometry and kinematics

The X-Root geometry prioritizes stability and endurance without sacrificing liveliness. Available in 5 sizes (XS to XL), the frame features a generous wheelbase (1012 mm in M), balanced Stack/Reach (571/380 mm in M) and progressive head tube angles (71° to 72.5° depending on size) for composed behavior on all terrains. The slightly lowered bottom bracket (66-70 mm) lowers the center of gravity, reinforcing stability on descents and rough paths. The short chainstays (420-428 mm) ensure reactivity and dynamism, while the CEC #400 carbon fork (optional) offers 395 mm axle-to-crown length with 45 mm offset.

Bikepacking-ready: equipment and modularity

Designed for ultra-distance and bikepacking, the X-Root integrates a multitude of threaded inserts:

• 3 bottle cage mounts on the main triangle (750 ml each)
• Frame bag eyelets bolted directly, eliminating sway
• Top tube mounting points for bag or accessories
• Rear rack and fender eyelets for touring setup
• Fork eyelets (if equipped with CEC #400) for front racks

Cable routing is internal/external modular according to preferences and drivetrain type, guaranteeing compatibility with mechanical groups (single chainring preferred) and electronic Di2/AXS in single or double chainring.

Standards and compatibility

• Bottom bracket: T47 x 85.5 mm (optimal protection, stiffness, internal routing)
• Headset: Semi-integrated ZS56/44 tapered
• Seatpost: 27.2 mm (promotes vertical flex and comfort)
• Seat collar: 31.8 mm
• Thru-axles: 12x100 mm front / 142x12 mm rear
• Brakes: Flat mount front/rear (160 mm discs standard, 140 mm front possible)
• Drivetrain: Shimano Ultegra 50x34, GRX 48x31 or single 44 teeth, SRAM AXS, Campagnolo Ekar
• Chainline: 43.5 mm

Chiru philosophy: French design, artisanal excellence

Founded in 2009 by Pierre-Arnaud Le Magnan, materials engineer and ultra-endurance athlete, Chiru Bikes has established itself as a reference for high-end titanium frames dedicated to adventure and long distances. Each X-Root frame is manufactured in triple-butted titanium (variable wall thicknesses) to optimize the weight/strength ratio. The hand-brushed finish and laser-engraved logo confer timeless elegance and discretion. The head tube badge and customizable frame plate (first name, nickname) add a touch of exclusivity.

Available variants

The Chiru X-Root frame is offered in several configurations:

• Frame only: Bare titanium frame with accessories (seat collar, UDH hanger). Ideal for 100% custom build.
• Frame + CEC #400 carbon fork kit: Lightweight carbon fork (compatible with 700x45c or 650bx2.1''), 3 eyelets, dynamo cable passage, front light mount.
• Frame + CEC #400T titanium fork kit: Matching titanium fork for aesthetic coherence and homogeneous all-titanium behavior.
• Adventure model (#400W fork): Reinforced fork compatible with tires up to 700x58 mm or 650x2.4'', for extreme gravel use and technical terrain.

Each variant is available in 5 sizes (XS, S, M, L, XL) to suit all body types (from 155 cm to 200 cm).

Use and target audience

The Chiru X-Root is aimed at passionate cyclists seeking a bike for life, capable of evolving with their practices: endurance sportives, gravel touring, long-distance bikepacking, ultra-cycling (Born to Ride France, Transcontinental Race), or even equipped cycle touring. Its tire versatility allows switching from an endurance road configuration (700x28-32 mm) to a committed gravel setup (650bx48 mm) by simply changing wheels. Resistant to corrosion, insensitive to shocks and fatigue, Grade 9 titanium guarantees an almost unlimited lifespan.