The Hook EXT Ti is built for riders who want a gravel bike that will last a lifetime. Its 3Al-2.5V titanium frame is naturally corrosion-proof, fatigue-resistant and incredibly durable, while the full-carbon fork adds agility, precision and all the mounting options needed for bikepacking or long-distance touring.
This is a machine crafted for adventure — capable on mixed terrain, stable under load and remarkably comfortable on long rides. Whether you are exploring remote gravel tracks, planning multi-day trips or riding every day in all weather conditions, the Hook EXT Ti offers a blend of performance and resilience that only titanium can provide.
Why it’s a Hook EXT Ti
- 3Al-2.5V titanium frame: corrosion-proof, long-lasting, naturally compliant and exceptionally strong.
- Full-carbon fork with rack/fender mounts, triple mounts and internal dynamo routing.
- Shimano GRX Di2 2×11 electronic drivetrain: precise, quiet and extremely reliable.
- Tubeless-ready wheelset with 27.5″ × 2.0″ tyres for traction and comfort on rough surfaces.
- Multiple mounting points on frame and fork: ideal for bikepacking, loaded touring and everyday use.
Key strengths
- Titanium construction: minimal maintenance, no rust, long fatigue life.
- Versatility: fully ready for racks, bags, fenders, dynamo and expedition setups.
- Light yet robust thanks to the titanium + carbon pairing.
- Top-tier drivetrain and brakes for consistent performance in all conditions.
- Wide-volume tyres for grip, comfort and control on mixed terrain.
Short description
The Hook EXT Ti is a premium titanium adventure gravel bike designed for long-lasting performance, exceptional comfort and reliable handling on gravel, dirt and multi-day routes.
Ideal for
- Multi-day bikepacking.
- Technical gravel and forest tracks.
- Mixed terrain (tarmac + gravel + dirt).
- All-weather commuting and utility riding.
- Riders seeking a “forever bike”.
Tech specs (summary)
– Frame: 3Al-2.5V titanium, T47 BB, rack/fender mounts, UDH dropout.
– Fork: Full carbon, thru-axle, rack/fender/triple mounts, dynamo routing.
– Drivetrain: Shimano GRX Di2 2×11, 48/31T, 11–34T.
– Brakes: Hydraulic disc brakes.
– Wheels: Tubeless-ready rims with 27.5″ × 2.0″ tyres.
Tyre clearance (official)
Frame – max without fenders:
650B × 52C
700C × 40C
Fork – max without fenders:
650B × 57C
700C × 57C
Technical interpretation
The Hook EXT Ti offers generous tyre versatility, with different limits at the frame and fork:
- In 650B format, the frame takes up to 52 mm while the fork accepts up to 57 mm, allowing high-volume setups for comfort and off-road control.
- In 700C format, the fork allows up to 57 mm, while the frame is limited to 40 mm — this rear limit defines the real maximum in 700C mode.
This opens the door to effective configurations:
- Wider front tyre for traction and steering confidence (front traction bias).
- Narrower rear tyre for efficiency and speed.
- Balanced setups for gravel touring or rugged exploration.
This flexibility is one of the reasons the EXT Ti is so well-suited to long-distance adventure riding.
Rider fit – size guide
Available sizes: XS → XL
XS: 150–161 cm
S: 160–171 cm
M: 170–181 cm
L: 179–190 cm
XL: 188–199 cm
For personalised advice, send us your height and inseam — we reply within 24 hours.
Recommended setups
- 650B wide-volume setup for technical gravel and mixed surfaces.
- 700C 38–40 mm for fast gravel and long-distance riding.
- Bikepacking: frame bag + handlebar roll + saddle bag.
- Touring or light expedition with racks and fenders.
- Front-biased traction setup for off-road confidence.
Independent reviews
- A titanium gravel bike designed for real-world adventure, with a stable yet lively geometry.
- Exceptional comfort and handling on long rides and varied terrain.
- A durable, reliable platform for bikepacking and touring with load.
Why buy from us
- Fast, tracked EU express shipping.
- Italian / English support.
- Honest, personalised size and setup advice.
- Email responses within 24 hours.
CTA
Ready for a lifetime titanium adventure bike?
Add the Hook EXT Ti – Titanium / Black to your cart.
Prefer to discuss before ordering?
info@bikejamming.it
Technical Tables
Specifications
| Item | Detail |
|---|
| Color 1 |
Titanium / black |
| Color 2 |
- |
| Color 3 |
- |
| Frame |
Titanium 3Al-2.5V, TA, rack / fender mounts, UDH derailleur hanger |
| 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, 25° flare |
| Grips |
Bombtrack Escape bar tape |
| Stem |
Seido Chase forged aluminium stem, 0° |
| Headset |
Sealed external aheadset, 1.1/2'' - 1.1/8'' |
| Levers |
Shimano GRX DI2 ST-RX815 hydraulic |
| Shifter |
Shimano GRX DI2 ST-RX815 2 × 11 |
| Brakes |
Shimano GRX BR-RX810 flat mount hydraulic disc brakes |
| Rotor |
Shimano SM-RT86 180 mm front and 160 mm rear rotor |
| Crankset |
Shimano GRX 810-2, hollow forged aluminium crank, 24 mm spindle |
| BB |
Bombtrack T47 internal sealed BB for 24 mm spindle |
| Pedals |
- |
| Chain |
KMC X11 EPT Anti Rust chain, 1/2'' × 11/128'', 112L |
| Chainring |
Shimano GRX, 48 T / 31 T |
| Cassette |
Shimano Ultegra CS-HG800, 11-speed, 11–34 T |
| Front derailleur |
Shimano GRX DI2 FD-RX815-F |
| Rear derailleur |
Shimano GRX DI2 RD-RX815 |
| Front hub |
Bombtrack Tau sealed hub, 6-bolt disc |
| Rear hub |
Bombtrack Tau sealed hub, 11-speed, 6-bolt disc |
| Through axle |
12 × 100 mm / 12 × 142 mm |
| Front rim |
WTB EZR i25, TCS 2.0, 32h |
| Rear rim |
WTB EZR i23, TCS 2.0, 32h |
| Saddle |
Bombtrack Dart saddle |
| Seat post |
Bombtrack Yew aluminium seatpost, 27.2 mm × 300 mm |
| Seat clamp |
Bombtrack Prime 31.8 mm |
| Front tire |
WTB Ranger TCS Light / Fast Rolling 27.5'' × 2.0'', tubeless ready |
| Rear tire |
WTB Ranger TCS Light / Fast Rolling 27.5'' × 2.0'', tubeless ready |
| Fender |
- |
| Rack |
- |
| Kickstand |
- |
| Light |
- |
| Charger |
Shimano SM-BCR2 charger |
| Weight |
10.8 kg (size M) |
| Weight frameset |
2060 g frame (size L, incl. TA, hanger) / 550 g fork (300 mm steerer, incl. TA) |
| Maximum rider weight |
130 kg incl. luggage |
| ASTM riding condition |
2 |
| Note |
Final product may vary in appearance, finish and minor details. |
Mounting information
| Item | Detail |
|---|
| BB standard |
T47 – 86.5 mm shell width |
| Headset standard (S.H.I.S.) |
EC34 / 28.6 | EC44 / 40 |
| Headset crown race angle |
45° |
| Fork steerer inner diameter |
23.6 mm |
| Fork max tire clearance w/o fender |
650B × 57C / 700C × 57C |
| Frame max tire clearance w/o fender |
650B × 52C / 700C × 40C |
| Maximum chainring clearance 1x |
44 T with 45 mm chainline |
| Maximum chainring clearance 2x |
50 / 36 T with 45 mm chainline |
| Seat post diameter |
27.2 mm |
| Seat clamp diameter |
31.8 mm |
| Front derailleur clamp diameter |
31.8 mm |
| Frame front derailleur compatible |
Yes |
| Brake mount front |
FM 160 / 180 |
| Brake mount rear |
FM 140 / 160 |
| Frame thickness rear brake mount |
25 mm |
| Maximum rotor clearance front |
180 mm |
| Maximum rotor clearance rear |
160 mm |
| Front through axle |
12 mm × 100 mm, 1.5 thread pitch |
| Rear through axle |
12 mm × 142 mm, 1.0 thread pitch |
| ISO testing standard |
Road |
| Crankarm |
XS–M 170 mm / L–XL 175 mm |
| Q Factor |
151 mm |
| BCD crank |
110 mm / 80 mm, asymmetric Shimano 4 bolts |
| Chainring offset |
0 mm |
| Chainline |
46.9 mm |
| Spoke length front wheel |
274 mm, 275 mm |
| Spoke length rear wheel |
273 mm, 275 mm |
| Spoke count (front / rear) |
32 / 32 |
| ERD |
570 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 |
XS–M 45 mm / L–XL 60 mm |
| Stem angle |
0° |
| Headset spacers |
1 × 10 mm, 2 × 5 mm |
| Seat post offset |
0 mm |
| Seat post length |
300 mm |
| Bike trailer |
Approved |
| Seat tube mounted child seat |
Not approved |
| Derailleur hanger |
Sram UDH |
| Frame small parts |
BT-CR-016 |
| 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-605 |
Geometry
| Bike Size | XS | S | M | L | XL |
|---|
| Wheel size |
27.5'' |
27.5'' |
27.5'' |
27.5'' |
27.5'' |
| Seat Tube Length |
460 |
500 |
530 |
570 |
600 |
| Horizontal TT length |
520 |
534 |
558 |
572 |
597 |
| Seat Angle |
73.9° |
73.9° |
73.5° |
73.5° |
73.0° |
| Seat Angle effective |
- |
- |
- |
- |
- |
| Head Angle |
70.9° |
70.9° |
71.5° |
71.5° |
71.5° |
| Headtube Length |
110 |
130 |
150 |
170 |
190 |
| BB Drop |
71 |
71 |
66 |
66 |
66 |
| Chainstay Length |
425 |
425 |
425 |
425 |
425 |
| Fork Offset |
53 |
53 |
53 |
53 |
53 |
| Trail |
64 |
64 |
61 |
60 |
60 |
| Wheelbase Length |
1003 |
1018 |
1034 |
1049 |
1068 |
| Standover |
753 |
782 |
805 |
834 |
857 |
| Reach |
360 |
369 |
381 |
390 |
403 |
| Stack |
558 |
577 |
593 |
612 |
631 |
| Front Center |
588 |
603 |
618 |
633 |
652 |
| Axle to Crown |
410 |
410 |
410 |
410 |
410 |
| Minimum rider height¹ |
1500 |
1600 |
1700 |
1790 |
1880 |
| Maximum rider height¹ |
1610 |
1710 |
1810 |
1900 |
1990 |
¹ The bike size recommendation is intended as an approximate guideline to narrow down options based on rider height. Proper bike fitting is complex and also depends on other body measurements and factors. Since no two riders are exactly the same, these recommendations cannot be 100% accurate for everyone. The best way to determine your ideal size is to contact your Bombtrack dealer (info@bikejamming.it) or a professional bike fitter.
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