CTM Carbon GRVL (max tire clearance 52mm) tapered, internal routing, 12mm thru axle

CTM KOYUK / ALU 6061 DB-Lite / GAG / ICR / 12x142mm, UDH, FSA T47 BB for SMNΦ24 (max tire clearance 55mm)

FSA NO.80/56/CR II Middle (integrated cable routing)

A versatile gravel bike with an all-new aluminum frame and lightweight carbon fork. The Koyuk 1.0 is comfortable for long days on rough terrain, yet nimble on the pavement. Up to 52mm tire clearance, higher-profile CTM GA60 aluminum wheels, FSA cockpit, ergonomic Selle Royal saddle, UDH rear derailleur dropout, plenty of accessory mounts, a sleek design, and a Shimano GRX drivetrain.

CTM KOYUK 1.0

52cm

54cm

56cm

58cm

60cm

An aluminum frame gravel bike with mid-range components and shimano grx 400 hydraulic disc brakes.

Frame	Aluminum
Suspension	Rigid
Fork	Carbon
Wheels	700c Aluminum
Drivetrain	2 × 10
Groupset	GRX 600, GRX 400
Brakes	Shimano GRX 400 Hydraulic Disc

Frame	CTM KOYUK / ALU 6061 DB-Lite / GAG / ICR / 12x142mm, UDH, FSA T47 BB for SMNΦ24 (max tire clearance 55mm) BB Standard: T47, Threaded Hanger Standard: UDH Tire Clearance: 55c
Fork	CTM Carbon GRVL (max tire clearance 52mm) tapered, internal routing, 12mm thru axle
Bottom Bracket	T47, threaded
Headset	FSA NO.80/56/CR II Middle (integrated cable routing)
Handlebar	FSA A-Wing
Saddle	Selle Royal
Seatpost	CTM Alloy 27.2mm Type: Rigid

Rear Derailleur	Shimano GRX / FD-RX400
Crank	Shimano GRX / FC-RX600 46-30T
Shifters	Shimano GRX / RX-400 10spd
Chain	Shimano HG54 10spd
Brakes	Shimano GRX / BR-RX400 Type: Shimano GRX 400 Hydraulic Disc

Rims	CTM GA60 700x26 28H
Front Hub	Novatec D981SB/D462TSB Thru axle 28H
Rear Hub	Novatec D981SB/D462TSB Thru axle 28H

2026 CTMKOYUK 1.0

2026 CTM
KOYUK 1.0