The Chiru Whipper is a titanium hardtail trail MTB frame designed to push the limits in the mountains. Developed for extreme exploration in the high-altitude ranges of Northeast Asia, this Grade 9 titanium frame embodies the Chiru philosophy: uncompromising performance, exceptional vertical comfort, and absolute versatility. Pierre-Arnaud Le Magnan, founder of Chiru Bikes and French materials engineer based in Hong Kong, envisioned the Whipper as the Swiss Army knife for high-altitude mountain bikers, capable of tackling technical rocky terrain while delivering formidable efficiency on the steepest climbs.

Exceptional Architecture and Materials

• Grade 9 Titanium 3Al/2.5V: proprietary tubes with differentiated cross-sections and thicknesses, cold-formed to optimize stiffness and comfort. Weight kept to just 1850 grams in size M.
• Ovalized chainstays: combined with laterally-compliant seatstays, they provide exceptional vertical comfort while guaranteeing maximum lateral stiffness for power transmission.
• Hand-brushed finish: refined aesthetic with laser-engraved logo, signature of Chiru's artisanal manufacturing.
• Modern Boost standards: 148 x 12 mm thru-axle, T47 x 92 mm threaded bottom bracket offering optimal stiffness and enhanced bearing protection.

Progressive Geometry and Trail Versatility

• Modern trail geometry: designed around a 130-140 mm fork, steep seat tube angle at 76.6° for maximum climbing efficiency, 67.0° head tube angle to facilitate obstacle clearance on rocky terrain.
• Generous tire compatibility: clearance for 29 x 2.5" or 27.5 x 3.0", allowing adaptability to technical terrain with low-pressure setups.
• Sloping geometry: allows installation of a dropper post with up to 175 mm travel for total freedom of position on descents or bike park sessions.
• Short chainstays: 425 mm for playful and responsive handling.

Technical Standards and Compatibility

• Boost drivetrain: compatible with 1x12-speed mechanical or electronic (Shimano Di2, SRAM AXS), max chainring 32 teeth, chainline 52 mm.
• SRAM UDH derailleur hanger: universal standard equipping all Chiru frames, guarantees compatibility with current and future groupsets.
• Semi-integrated headset: ZS56/44 mm tapered, compatible with modern trail forks.
• Versatile internal routing: internal or external routing for derailleur cable and rear brake hose, internal for dropper post (no routing provided for lighting).
• Postmount 180 mm brake: rear mount optimized for powerful braking.

Bikepacking and Adventure

• Integrated mounting points: eyelets for top tube bag and 2 bottle cages, allowing you to travel light in flash-packing mode or loaded for ultra-distance.
• 31.6 mm seatpost: standard diameter offering compatibility with most dropper posts on the market.
• Ultra-endurance philosophy: every detail of the Whipper aims to eliminate sources of mechanical issues during long self-supported explorations.

Available Variants

The Chiru Whipper frame is offered in three sizes to suit all body types:

• Size S: Reach 438 mm, Stack 635 mm, effective top tube 590 mm, wheelbase 1148 mm. Recommended rider height 164-176 cm.
• Size M: Reach 467 mm, Stack 644 mm, effective top tube 620 mm, wheelbase 1180 mm. Recommended rider height 174-185 cm. Weight 1850 g.
• Size L: Reach 500 mm, Stack 649 mm, effective top tube 655 mm, wheelbase 1218 mm. Recommended rider height 184-195 cm.

Each size maintains the same 425 mm chainstays, the same seat tube angle (76.6°) and head tube angle (67.0°) to guarantee consistent handling regardless of rider morphology. Geometry calculated with 130 mm fork (A-C 537 mm, offset 44 mm).

Chiru Bikes DNA

Founded in 2009 by Pierre-Arnaud Le Magnan, a French engineer passionate about ultra-endurance and bikepacking, Chiru Bikes has established itself as a reference for titanium frames for demanding adventurers. Based in Hong Kong, the brand takes its name from the Chiru, a Tibetan antelope capable of running at 110 km/h on high plateaus between 3700 and 5500 m altitude. Each Chiru frame is first tested by Pierre-Arnaud himself on the most formidable events (French Divide, Silk Road Mountain Race, Highland Trail 550) before being marketed. The Whipper embodies this field-tested approach: an ultra-high-performance tool for pushing the limits of hardtails on technical mountain terrain.