Bombtrack HOOK EXT C APEX AXS

The Bombtrack Hook EXT C Apex AXS is a high-end gravel/adventure bike featuring a lightweight Toray T800 carbon frame. The frame offers optional internal cable routing, multiple mounting points for racks, fenders, and frame bags, and a T47 bottom bracket. The Seido MGV full carbon fork allows generous tire clearance, internal cable routing, and multiple mounting options.

• Frame: Toray T800 Carbon, T47 BB, UDH derailleur hanger, optional full internal cable routing, rack/fender mounts
• Fork: Seido MGV Carbon, 1.5"-1.125", fender/triple cage mounts, max rotor 180 mm
• Handlebar: Seido Tackle Dropbar, 31.8 mm, 16° flare
• Stem: Seido Scatter Aluminium, -7°
• Grips/Bar tape: Bombtrack Escape
• Headset: Sealed integrated, 1.5"-1.5"
• Levers/Shifters: SRAM Apex AXS Double Tap hydraulic
• Drivetrain: SRAM Apex AXS 1x12, 38T chainring, SRAM NX Eagle PG-1230 11-50T cassette
• Brakes: SRAM Apex Flat Mount hydraulic disc brakes, 180/160 mm Centerline rotors
• Crankset: SRAM Apex Wide, DUB spindle
• Chain: SRAM Apex 1/2" x 11/128", 114L
• Rear derailleur: SRAM X1 Eagle AXS, clutch, long cage
• Wheels: Seido Geon i23 Double Wall, tubeless ready, 28h front and rear
• Hubs: Seido Tau, sealed, 6-bolt disc
• Axles: 12 x 100 mm / 12 x 142 mm thru-axle
• Saddle: Seido Course
• Seatpost: Seido Yew Aluminium, 27.2 mm x 350 mm
• Seat clamp: Bombtrack Prime 31.8 mm
• Tires: WTB Venture TCS Light 700C x 40C, tubeless ready
• Weight: 9.9 kg (size M), Frame: 1380 g, Fork: 550 g
• Maximum rider weight including luggage: 115 kg
• ASTM riding condition: 2

Specification

Frame
BB standard: T47 - 85.5 mm shell width
Frame max tire clearance w/o fender: 57-584 / 45-622
Frame front derailleur compatible: yes
Front derailleur clamp diameter:
bolt on FD hanger included in frame
Brake mount rear: FM 160 / 180
Maximum rotor clearance rear: 180 mm
Frame thickness rear brake mount: 30 mm
Bike trailer: not approved
Seat tube mounted child seat: not approved
ISO testing standard: Road

Fork
Fork max tire clearance w/o fender:
57-584 / 57-622
Fork steerer inner diameter: 23.6 mm
Headset standard (S.H.I.S.):
IS52 / 28.6 | IS52 / 40
Headset crown race angle: 36°
Brake mount front: FM 160 / 180
Maximum rotor clearance front: 180 mm

Drivetrain
Maximum chainring clearance 1x:
42 T with 47 mm chainline
Maximum chainring clearance 2x:
48 / 31 T with 47 mm chainline
Crankarm:
S - M 170 mm
L 175 mm
Q Factor: 150 mm
BCD crank: 8 bolt direct mount (Sram compatible)
Chainring offset: 6 mm
Chainline: 47.5 mm

Seat & Seatpost
Seat post diameter: 27.2 mm
Seat post offset: 0 mm
Seat post length: 350 mm
Seat clamp diameter: 31.8 mm

Cockpit
Stem length:
S - M 90 mm
L 100 mm
Stem angle: -7°
Headset spacers: 1 x 10 mm, 2 x 5 mm

Wheels
Spoke count (front / rear): 32 / 32
Front through axle:
12 mm x 100 mm, 1.5 thread pitch
Rear through axle:
12 mm x 142 mm, 1.0 thread pitch
ERD: 587.5 mm
Front hub PCD: 58 mm
Rear hub PCD: 58 mm
Front hub flange distance / offset:
56.5 mm center to center / 6.6 mm
Rear hub flange distance / offset:
51 mm center to center / 8.8 mm

Spare Parts
Derailleur hanger: Sram UDH
Frame small parts: BT-CR-014 / BT-CR-015
Hub end caps front: BT-HC-014
Hub end caps rear: BT-HC-017
Cassette body: BT-CB-006
Through axle front: BT-TA-F-601
Through axle rear: BT-TA-R-606

Geometry