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Chiru Alpin Gravel - photographie du cadre Titane équipé
Chiru Alpin Gravel - photographie du cadre seul
Chiru Alpin Gravel - photographie du cadre équipé d'une fourche Titane
Chiru Alpin Gravel - photographie du cadre équipé d'une fourche Fox suspendue
Chiru Alpin Gravel - photographie du cadre équipé en Bikepacking
Chiru Alpin Gravel - photographie du cadre équipé
Chiru Alpin Gravel - photographie du cadre Titane équipé
Chiru Alpin Gravel - photographie du cadre seul
Chiru Alpin Gravel - photographie du cadre équipé d'une fourche Titane
Chiru Alpin Gravel - photographie du cadre équipé d'une fourche Fox suspendue
Chiru Alpin Gravel - photographie du cadre équipé en Bikepacking
Chiru Alpin Gravel - photographie du cadre équipé

Alpin
Gravel Titanium Frame

SKU N/A Category Tag
From 2710.00 

lifetime warranty

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Agility
Stability
Bikepacking
Comfort
Versatility

gravel for Mountain-dweller addict

Tire clearance

700c x 43/55c or 650b x 2.2".

Bikepacking ready!

Top-tube bag mount, rear rack + mudguard mounts and 4 sets of Bottle mounts

Transmission

GRAVEL type, 1x11s, 1x12s, 2x11s, 2x12s, Mechanical, Di2 or AXS, 48/31T max chainring or 44T single chainring

Geometry

Progressive mountain, fixed or 50 mm travel fork

Lighting

Internal cable routing for rear light

Handle bar

Gravel

Surface

Hard gravel, alpine trail

Configure your Alpin

Alpin

The titanium gravel frame designed to tackle the Tour du Mont Blanc

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.

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Ivan Couturier

His playground

Chiru innovations

Specifications

Frame
MaterialTitanium Grade 9 3Al/2.5V, proprietary tubing with differentiated cross-section and thickness.
FinishBrushed, Logo laser engraved
Tire clearance700c x 43/55c or 650b x 2.2" or 650b x 2.2".
Transmission compatibilityGRX 48x31T, or 44T (mechanical or Di2)
SRAM Road (mechanical or AXS)
Campagnolo Ekar
Bottom bracket compatibilityT47 x 85.5 mm
Through axisRear: 142x12 mm
Mounting points
  • Luggage rack
  • Mudguard
  • Horizontal tube bag
  • 4 can holders (4 x 750ml)
Head tube56/44 mm conical
Rear brake mountFlat mount 160 mm
RoutingInternal or external for derailleurs + rear brake housing
Internal for seat-dropper
Internal for rear lighting
Seat postDiameter 27.2 mm
Seat tube clampDiameter 31.8 mm
Accessories included
  • Semi-integrated headset ZS56/44
  • CEC seat post clamp #S32 Titanium, Diam. 31.9 mm
  • CEC rear axle 142x12 mm
  • Fork pivot expander + CEC cover
  • Titanium screws M5x10
  • Rubber covers for cable entry
  • SRAM UDH derailleur hanger
Options

Fork #430T

MaterialTitanium
FinishHand-brushed, laser-engraved logo
Tire clearance700c x 2.5" (64 mm) & 650b x 2.6" (2.6")
Through axle100x12 mm x p1.5
Mounting points
  • Mudguard
  • 2 x 3-point mounting (3 Kg / side)
  • front lighting
Pivottapered 1" 1/8-1.5", L: 290 mm, diam. int. 25 mm
RoutingInternal for front brake hose
Internal for dynamo cable
Brake mountFlat mount 140 or 160 mm
Length and offset430 x 50 mm
Weight745 g
Accessories included
  • Front axle
  • Titanium screws M5x10
  • Rubber covers for cable entry

TOKEN bottom bracket T47R24 x 85.5

Type / Cage materialInternal bearing / Aluminum
Compatible modelAll models with 85.5 mm BB shell width
Compatible cranksetShimano 24 mm axle crankset
BearingABEC-3 / Titanium nitride-coated bearing cage
SpacerAluminium, for BB shell width 85.5mm
Clamping crown16 notches / dia. 48.5
Mounting toolPark tool 27.3
ColorBlack

SRAM UDH derailleur hanger

MaterialAluminum
Compatible modelAll Chiru ranges after 2021 except Kunlun and Savage
Compatible derailleurAll types of derailleur: Sram, Shimano, Campagnolo, Rotor, Microshift
Axle compatibilityM12x1.0
ColorBlack

CEC seat post #380

MaterialUnidirectional Carbon
AccessoryAluminium + 316 stainless steel screws
Length380 mm
Offset0
Diameter 27.2 mm
Saddle rail compatibility7 mm round or 7x10 mm carbon rail
Weight195 g

CEC seat post #380-13Ti

MaterialTitanium 3Al/2.5V
AccessoryTitanium cradle + titanium screws
Length380 mm
Offset13 mm
Diameter 27.2 mm
Saddle rail compatibility7 mm round or 7x10 mm carbon rail
Weight230 g
User weight limit100 kg

CEC hanger #440

MaterialUnidirectional Carbon
Width440 mm
Drop/rise130 mm
Clamping diameter31.8 mm
Max. width clamping52 mm
Reach76 mm
Back Sweep4 deg.
Out Sweep14 deg.
Weight240 g

CEC hanger #D460T

MaterialTitanium 3Al/2.5V
Width420, 440, 460, 480 mm
Drop/rise100 mm
Clamping diameter31.8 mm
Max. width clamping95 mm on supplied spacer
Reach60 mm
Back Sweep6 deg.
Out Sweep14 deg.
Weight290 g
Geometry
SizeSML
TT (mm)545575600
S (mm)420450475
RC (mm)428430435
W (mm)108611181145
BB (mm)747068
HT (mm)135150180
SA (deg.)74.574.574.1
HA (deg.)67.76868.3
AC (mm)427427427
O (mm)505050
ST (mm)576587615
R (mm)401431443.8
Size
Rider (cm)Inseam (cm) Frame
162-173-S
172-180-M
180-188-L

The expert's eye

Build your dream rig.

Yannick Lutz's build-up
Crossing the Swiss Alps

FORK

CEC Titanium #430T

BRAKES

SHIMANO GRX

TRANSMISSION

SHIMANO GRX 1x11s, Rotor Crank 34T.

WHEELS

Wheel set CEC W2435

TIRES

Maxxis Rambler 50C + Panaracer Driver Pro 2.1"

HANDLE BAR

Ritchey WCS Venture Max

STEM

CEC Titanium 90 mm

SADDLE

Selle Italia

SEATPOST

CEC #380 Carbon

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