HOOK EXT C APEX AXS
The Hook EXT C looks fast even when it’s standing still. Whether you're tearing up gravel races or heading out on an epic bikepacking trip, this bike is built for full-throttle fun - with a grin guaranteed. The Hook EXT C comes with a lightweight T800 carbon frame, featuring optional internal cable routing and a full suite of signature mounting points - perfect for fast-and-light rides with frame bags in tow. Up front, the Seido MGV fork delivers generous tyre clearance, internal routing, and plenty of mount options for your gear. SRAM’s electronic Apex AXS 1x groupset handles shifting and braking, pairing a wide-range 12-speed 10 - 50T cassette with a 38T direct-mount chainring. At the cockpit, you’ll find Seido’s Tackle handlebar with a 16˚ flare, offering confident control and comfort. Rounding out the build are the SEIDO Geon gravel wheels, wrapped in 40 mm WTB Venture tyres for dependable traction on any terrain.
GLOSSY RED
METALLIC BLACK
HIGHLIGHTS
-
![]()
FRAME
Carbon frame with UDH hanger and optional full internal cable routing.
-
![]()
FORK
Seido MGV full carbon fork with lowrider mounts and internal light cable routing.
-
![]()
DRIVETRAIN
Electronic Sram Apex 1 x 12 groupset with hydraulic brakes.
-
![]()
CASSETTE
Sram NX Eagle 11 – 50 T cassette for wide 1x gear range.
-
![]()
CRANKSET
Sram Apex Wide crankset with 38 T direct mount chainring.
-
![]()
SADDLE
Seido Course short nose saddle.
"With the ability to carry serious loads, triple mounts on the forks and three separate bottle cage fixings allow you to carry as much as you need with you.”
SPECIFICATIONS
| Model | HOOK EXT C APEX AXS |
|---|---|
| Color 1 | Metallic black |
| Color 2 | Glossy red |
| Color 3 | - |
| Frame | Toray T800 carbon blend, TA, rack / fender mounts, internal hub dynamo cable routing, 85.5 mm T47 BB shell, UDH derailleur hanger, optional full internal cable routing |
| Fork | Seido MGV full carbon, TA, 1.1/2'' - 1.1/8'', fender / triple cage mounts, 180 mm max rotor size, lowrider rack compatible, internal hub dynamo cable routing |
| Handlebar | Seido Tackle drop bar, 31.8 mm, 16° flare |
| Grips | Bombtrack Escape bar tape |
| Stem | Seido Scatter forged aluminium stem, -7° |
| Headset | Sealed integrated headset, 1.1/2'' - 1.1/2'' |
| Levers | Sram Apex AXS double tap hydraulic |
| Shifter | Sram Apex AXS double tap 1 x 12 |
| Brakes | Sram Apex flat mount hydraulic disc brakes |
| Rotor | Sram Centerline 180 mm front and 160 mm rear rotor |
| Crankset | Sram Apex Wide, DUB spindle |
| BB | Sram DUB T47 85.5 mm |
| Pedals | - |
| Chain | Sram Apex, flattop, 1/2'' x 11/128'', 114L |
| Chainring | Sram Apex, 12-speed, 38 T |
| Cassette | Sram NX Eagle PG-1230 12-speed, 11 - 50 T |
| Front derailleur | - |
| Rear derailleur | Sram X1 Eagle AXS, clutch, long cage |
| Front hub | Seido Tau sealed hub, 6-bolt disc |
| Rear hub | Seido Tau sealed hub, HG driver, 6-bolt disc |
| Through axle | 12 x 100 mm / 12 x 142 mm |
| Front rim | Seido Geon i23 double wall asymmetric, tubeless ready, 28h |
| Rear rim | Seido Geon i23 double wall asymmetric, tubeless ready, 28h |
| Saddle | Seido Course saddle |
| Seat post | Seido Yew aluminium seatpost, 27.2 mm x 350 mm |
| Seat clamp | Bombtrack Prime 31.8 mm |
| Front tire | WTB Venture TCS Light 700C x 40C, tubeless ready |
| Rear tire | WTB Venture TCS Light 700C x 40C, tubeless ready |
| Fender | - |
| Rack | - |
| Kickstand | - |
| Light | - |
| Weight | 9.9 kg (size M) |
| Weight frameset | 1380 g frame (size M, incl. TA, hanger) / 550 g fork (300 mm steerer, incl. TA) |
| Maximum rider weight | 115 kg incl. luggage |
| ASTM riding condition | 2 |
| Charger | Sram EP-EAC-BC-A1 |
Final product may vary in appearance, finish and minor details.
BUILD INFOS
| Model | HOOK EXT C APEX AXS |
|---|---|
| BB standard | T47 - 85.5 mm shell width |
| Headset standard (S.H.I.S.) | IS52 / 28.6 | IS52 / 40 |
| Headset crown race angle | 36° |
| Fork steerer inner diameter | 23.6 mm |
| Fork max tire clearance w/o fender | 650B x 57C / 700C x 57C |
| Frame max tire clearance w/o fender | 650B x 57C / 700C x 45C |
| Maximum chainring clearance 1x | 42 T with 47 mm chainline |
| Maximum chainring clearance 2x | 48 / 31 T with 47 mm chainline |
| Seat post diameter | 27.2 mm |
| Seat clamp diameter | 31.8 mm |
| Front derailleur clamp diameter | bolt on FD hanger included in frame |
| Frame front derailleur compatible | yes |
| Brake mount front | FM 160 / 180 |
| Brake mount rear | FM 160 / 180 |
| Frame thickness rear brake mount | 30 mm |
| Maximum rotor clearance front | 180 mm |
| Maximum rotor clearance rear | 180 mm |
| Front through axle | 12 mm x 100 mm, 1.5 thread pitch |
| Rear through axle | 12 mm x 142 mm, 1.0 thread pitch |
| ISO testing standard | Road |
| Crankarm | S - M 170 mm / L 175 mm |
| Q Factor | 150 mm |
| BCD crank | Sram direct mount |
| Chainring offset | 6 mm |
| Chainline | 47.5 mm |
| Spoke length front wheel | tba |
| Spoke length rear wheel | tba |
| Spoke count (front / rear) | 28 / 28 |
| 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 |
| Stem length | S 80 mm / M 90 mm / L 100 mm |
| Stem angle | -7° |
| Headset spacers | 1 x 10 mm, 2 x 5 mm |
| Seat post offset | 0 mm |
| Seat post length | 350 mm |
| Bike trailer | not approved |
| Seat tube mounted child seat | not approved |
| 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 |
| Crankarm bolt | - |
| Through axle front | BT-TA-F-601 |
| Through axle rear | BT-TA-R-606 |
GEOMETRY
FRAME GEOMETRY
| Model | HOOK EXT C APEX AXS | ||
|---|---|---|---|
| Bike Size | S | M | L |
| Wheel size | 700C | 700C | 700C |
| Seat Tube Length | 500 | 530 | 570 |
| Horizontal TT length | 541 | 563 | 580 |
| Seat Angle | 74.5° | 74.0° | 74.0° |
| Seat Angle effective | |||
| Head Angle | 70.5° | 70.5° | 70.5° |
| Headtube Length | 130 | 150 | 170 |
| BB Drop | 72 | 72 | 72 |
| Chainstay Length | 425 | 429 | 434 |
| Fork Offset | 53 | 53 | 53 |
| Trail | 69 | 69 | 69 |
| Wheelbase Length | 1034 | 1056 | 1079 |
| Standover | 773 | 805 | 822 |
| Reach | 384 | 396 | 407 |
| Stack | 564 | 583 | 602 |
| Front Center | 619 | 637 | 655 |
| Axle to Crown | 410 | 410 | 410 |
| Minimum rider height ¹ | 1630 | 1710 | 1790 |
| Maximum rider height ¹ | 1730 | 1810 | 1880 |
¹ Our bike size recommendation generally represents a rough guideline for quickly narrowing down the sizes from which to choose based on the body height. Bike fitting is a complex topic and other measurements and factors have to be accounted for as well. Since no two human bodys are exactly the same it is not possible to give a 100% correct advice for everyone. Therefore Bombtrack cannot guarantee for the stated recommendations to be correct for every individual customer. The best way to work out the correct size is to consult a local Bombtrack dealer or a professional bike fitter and have them determine the needed size.
HANDLEBAR GEOMETRY
| Model | HOOK EXT C | ||
|---|---|---|---|
| Bike Size | S | M | L |
| Handlebar type | Dropbar | Dropbar | Dropbar |
| Width (drops) | 420 | 420 | 440 |
| Width (barends) | 490 | 490 | 510 |
| Reach | 77 | 77 | 77 |
| Flare | 16° | 16° | 16° |
| Backsweep | - | - | - |
| Drop | 128 | 128 | 128 |
| Upsweep | - | - | - |
| Rise | - | - | - |
