700c x 43/55c or 650b x 2.2".
Top-tube bag mount, rear rack + mudguard mounts and 4 sets of Bottle mounts
GRAVEL type, 1x11s, 1x12s, 2x11s, 2x12s, Mechanical, Di2 or AXS, 48/31T max chainring or 44T single chainring
Progressive mountain, fixed or 50 mm travel fork
Internal cable routing for rear light
Gravel
Hard gravel, alpine trail
The Chiru Alpin titanium gravel frame was developed following Yannick Lutz’s record-breaking tour of Mont-Blanc in 2019 in 12 hours and 27 minutes. Yannick achieved this feat by alternating racing and mountain biking. To follow Chiru’s reasoning to its logical conclusion, it was necessary to invent a single frame to pedal around the white giant, with a single bike!
Chiru Alpin, a titanium frame for steep slopes and technical mountain terrain
For added aggressiveness, the Chiru Alpin frame is equipped with a rigid 430mm titanium CEC fork (yes, that’s pure Chiru spirit!). If you prefer greater comfort on technical trails, Chiru Alpin can also be fitted with a short-travel telescopic fork (50mm). Chiru Alpin is designed for standard gravel drivetrains and wheels.
The choice of mountaineers looking for sensations, responsiveness and comfort
The rear triangle of the Chiru Alpin is designed with oval bases and stays attached at the top tube junction. It is equipped with the SRAM UDH derailleur hanger. Attachment points allow you to carry the luggage you need for short, technical mountain outings.
The Chiru Alpin titanium gravel frame was developed following Yannick Lutz's record-breaking tour of Mont-Blanc in 2019 in 12 hours and 27 minutes. Yannick achieved this feat by alternating racing and mountain biking. To follow Chiru's reasoning to its logical conclusion, it was necessary to invent a single frame to pedal around the white giant, with a single bike!
Chiru Alpin, a titanium frame for steep slopes and technical mountain terrain
For added aggressiveness, the Chiru Alpin frame is equipped with a rigid 430mm titanium CEC fork (yes, that's pure Chiru spirit!). If you prefer greater comfort on technical trails, Chiru Alpin can also be fitted with a short-travel telescopic fork (50mm). Chiru Alpin is designed for standard gravel drivetrains and wheels.
The choice of mountaineers looking for sensations, responsiveness and comfort
The rear triangle of the Chiru Alpin is designed with oval bases and stays attached at the top tube junction. It is equipped with the SRAM UDH derailleur hanger. Attachment points allow you to carry the luggage you need for short, technical mountain outings.
Ivan Couturier
| Material | Titanium Grade 9 3Al/2.5V, proprietary tubing with differentiated cross-section and thickness. |
| Finish | Brushed, Logo laser engraved |
| Tire clearance | 700c x 43/55c or 650b x 2.2" or 650b x 2.2". |
| Transmission compatibility | GRX 48x31T, or 44T (mechanical or Di2) SRAM Road (mechanical or AXS) Campagnolo Ekar |
| Bottom bracket compatibility | T47 x 85.5 mm |
| Through axis | Rear: 142x12 mm |
| Mounting points |
|
| Head tube | 56/44 mm conical |
| Rear brake mount | Flat mount 160 mm |
| Routing | Internal or external for derailleurs + rear brake housing Internal for seat-dropper Internal for rear lighting |
| Seat post | Diameter 27.2 mm |
| Seat tube clamp | Diameter 31.8 mm |
| Accessories included |
|
| Material | Titanium |
| Finish | Hand-brushed, laser-engraved logo |
| Tire clearance | 700c x 2.5" (64 mm) & 650b x 2.6" (2.6") |
| Through axle | 100x12 mm x p1.5 |
| Mounting points |
|
| Pivot | tapered 1" 1/8-1.5", L: 290 mm, diam. int. 25 mm |
| Routing | Internal for front brake hose Internal for dynamo cable |
| Brake mount | Flat mount 140 or 160 mm |
| Length and offset | 430 x 50 mm |
| Weight | 745 g |
| Accessories included |
|
| Type / Cage material | Internal bearing / Aluminum |
| Compatible model | All models with 85.5 mm BB shell width |
| Compatible crankset | Shimano 24 mm axle crankset |
| Bearing | ABEC-3 / Titanium nitride-coated bearing cage |
| Spacer | Aluminium, for BB shell width 85.5mm |
| Clamping crown | 16 notches / dia. 48.5 |
| Mounting tool | Park tool 27.3 |
| Color | Black |
| Material | Aluminum |
| Compatible model | All Chiru ranges after 2021 except Kunlun and Savage |
| Compatible derailleur | All types of derailleur: Sram, Shimano, Campagnolo, Rotor, Microshift |
| Axle compatibility | M12x1.0 |
| Color | Black |
| Material | Unidirectional Carbon |
| Accessory | Aluminium + 316 stainless steel screws |
| Length | 380 mm |
| Offset | 0 |
| Diameter | 27.2 mm |
| Saddle rail compatibility | 7 mm round or 7x10 mm carbon rail |
| Weight | 195 g |
| Material | Titanium 3Al/2.5V |
| Accessories | Titanium cradle + titanium screws |
| Length | 330 mm |
| Offset | 13 mm |
| Diameter | 27.2 mm |
| Saddle rail compatibility | 7 mm round or 7x10 mm carbon rail |
| Weight | 210 g |
| User weight limit | 100 kg |
| Material | Titanium 3Al/2.5V |
| Accessory | Titanium cradle + titanium screws |
| Length | 380 mm |
| Offset | 13 mm |
| Diameter | 27.2 mm |
| Saddle rail compatibility | 7 mm round or 7x10 mm carbon rail |
| Weight | 230 g |
| User weight limit | 100 kg |
| Size | S | M | L |
|---|---|---|---|
| TT (mm) | 545 | 575 | 600 |
| S (mm) | 420 | 450 | 475 |
| RC (mm) | 428 | 430 | 435 |
| W (mm) | 1086 | 1118 | 1145 |
| BB (mm) | 74 | 70 | 68 |
| HT (mm) | 135 | 150 | 180 |
| SA (deg.) | 74.5 | 74.5 | 74.1 |
| HA (deg.) | 67.7 | 68 | 68.3 |
| AC (mm) | 427 | 427 | 427 |
| O (mm) | 50 | 50 | 50 |
| ST (mm) | 576 | 587 | 615 |
| R (mm) | 401 | 431 | 443.8 |
| Rider (cm) | Inseam (cm) | Frame |
|---|---|---|
| 162-173 | - | S |
| 172-180 | - | M |
| 180-188 | - | L |
CEC Titanium #430T
SHIMANO GRX
SHIMANO GRX 1x11s, Rotor Crank 34T.
Wheel set CEC W2435
Maxxis Rambler 50C + Panaracer Driver Pro 2.1"
Ritchey WCS Venture Max
CEC Titanium 90 mm
Selle Italia
CEC #380 Carbon
Titanium frames and high-end components for demanding adventurous cyclists.
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