Aluminium trail hardtail with 130 mm suspension and 29” wheels, built as the entry point into the Cale range with a solid, modern platform for technical trails, aggressive bikepacking and mountain riding. It is the most accessible version in the family, with a simple and effective setup focused on robustness, ease of use and genuine off-road capability.
Secure payments and protected data
Secure & tracked delivery
Regulated and transparent withdrawal
Bombtrack Cale AL Advent X
The Bombtrack Cale AL Advent X is a modern aluminium hardtail designed for trail riding, aggressive bikepacking and demanding alpine loops. A 6061-T6 hydro-formed frame, 130 mm RockShox suspension fork and 29" tubeless-ready wheels make it a solid, confidence-inspiring and surprisingly versatile partner – from weekday trail sessions to long mountain adventures.
6061-T6 hydro-formed aluminium frame with Boost spacing, rack and fender mounts, stealth dropper routing and a 73 mm BSA bottom bracket shell.
RockShox 35 Silver R, 130 mm travel with 35 mm stanchions for extra stiffness and control on technical terrain.
Microshift Advent X 1x10 drivetrain with 28 T chainring and 11–48 T cassette for low climbing gears on steep and loose climbs.
Tektro Orion 4-piston hydraulic disc brakes with 203/180 mm rotors for powerful, consistent braking on long descents.
WTB ST i29 29" rims with Kenda Hellcat Pro 29" x 2.4" tubeless-ready tyres, ready for roots, rocks and rough trail surfaces.
Matt Purple finish with a clean yet distinctive look that fits perfectly into the Bombtrack trail & adventure universe.
Within the Cale family, the AL Advent X is the ideal entry point into Bombtrack’s trail world: it keeps the progressive geometry and “mountain adventure” attitude of the range but combines it with an accessible and robust aluminium frame that is ready to be loaded with bags, racks and all your bikepacking kit.
Performance & ideal terrain
With a slack head angle, 130 mm fork and 29" wheels, the Cale AL Advent X is built for all-round trail use: stable on descents, composed on steep sections and still efficient enough for long climbs thanks to the 1x drivetrain and centred riding position.
On-road & off-road behaviour
Climbing & transfers: the aluminium frame and wide 28 / 11–48 T gearing make long, steep climbs manageable, even when fully loaded.
Technical trail riding: the 130 mm fork, 35 mm stanchions and 2.4" tyres deliver traction and control through rock gardens, roots and rough singletrack.
Rugged commuting: add fenders and a rear rack and you get a “do-it-all” machine for broken tarmac, cobbles and gravel service roads.
Best use cases
Alpine and hilly trails with technical sections.
Off-road bikepacking and multi-day micro-adventures.
Light bike park use, trail centres and all-mountain loops with plenty of elevation.
Mixed city–gravel riding if you want one tough, dependable bike.
Recommended setups
Trail / All-Mountain: keep the Kenda Hellcat Pro 29" x 2.4" tyres set up tubeless, run moderate to low pressures, combine with the Seido Waypoint flat bar and short Chase stem for maximum control on descents.
Bikepacking & Adventure: use the mounting points on down tube, top tube and rear triangle for frame bags, cages and racks. Consider slightly faster-rolling tyres if your routes mix hardpack, forest roads and tarmac.
All-weather workhorse: fit full fenders and a rear rack; the 2.4" tyres ensure comfort and grip on wet roads and muddy tracks.
Independent opinions & press highlights
Specialist MTB outlets and spec databases consistently describe the Cale AL Advent X as a trail-ready aluminium hardtail with a high-value build, offering a very complete package at a sensible price point.
Reviewers often praise its long, stable geometry derived from Bombtrack’s adventure and bikepacking experience, which makes the bike confidence inspiring on descents without feeling dull or sluggish when you point it uphill.
The combination of a 4-piston brake set and wide-range Advent X drivetrain is frequently highlighted as a real-world advantage for riders who tackle long descents and sustained, technical climbs on loose terrain.
WTB ST i29 rims and 2.4" tubeless-ready tyres are commonly seen as a smart choice for riders wanting one bike that can do trail centres, alpine tours and demanding bikepacking trips, balancing rolling speed, comfort and grip.
Bombtrack Cale AL Advent X – size guide
Size
Min. rider height (cm)
Max. rider height (cm)
Notes
M
170
181
Great for medium heights and a slightly more compact riding position.
L
179
190
Balanced choice for trail riding and bikepacking versatility.
XL
188
199
For taller riders looking for maximum stability and generous reach.
The height recommendations above are intended as general guidelines to help narrow down your options. Proper bike fitting is more complex and should also take into account inseam, torso and arm length, flexibility and riding style.
Because no two riders are exactly the same, it is impossible to provide advice that works perfectly for everyone. The best way to find your ideal size is to consult your local Bombtrack dealer or a professional bike fitter.
Bikejamming size & setup support
Unsure between two sizes or not sure how to set up the bike for trail use, bikepacking or mixed riding? Drop us a line at info@bikejamming.it and tell us how and where you ride: we’ll help you choose the right size, dial in your setup and suggest potential upgrades based on real-world use.
CTA
The Bombtrack Cale AL Advent X – Matt Purple is the right choice if you want a hardtail that can jump from technical trail rides to demanding bikepacking trips, with a robust aluminium frame, 130 mm fork and a ready-to-ride build straight out of the box.
Not sure if it’s the perfect match for you, which size to pick or how to tune it to your riding style? Get in touch at info@bikejamming.it or contact us directly through Bikejamming: we can advise you on tyres, cockpit choices, dropper posts, wheel upgrades and luggage solutions to turn your Cale AL Advent X into the ultimate adventure hardtail.
Ready to leave the usual routes behind? Configure your Cale AL Advent X now and point it towards the nearest piece of singletrack.
Cale AL Advent X: accessible trail hardtail, real use and range differences
What kind of bike is the Cale AL Advent X?
It is an aluminium trail hardtail with 29” wheels and 130 mm of front suspension. It is built for riders who want a modern MTB that is capable off-road while still being straightforward to own and maintain.
Who is the Cale AL Advent X for?
It makes a lot of sense for riders entering the Bombtrack trail range with a more accessible budget, without giving up modern geometry and a genuinely trail-ready platform.
Is the Cale AL Advent X suitable for bikepacking?
Yes, especially for light to mid-duty off-road bikepacking. Rack and accessory mounts, combined with stable handling, make it a good option for micro-adventures and multi-day rides.
How does it perform on technical trails?
Very well for its category. The 130 mm fork, 29” wheels and modern geometry help on singletrack, roots, rocks and technical descents while keeping the bike predictable.
What is the difference between the Cale AL Advent X and the Cale AL SX Eagle?
The Advent X is the more essential and more accessible aluminium Cale. The SX Eagle sits a step above in drivetrain and positioning, making it more appealing to riders who want a sharper or more upgrade-oriented build.
What is the difference between the Cale AL Advent X and the Cale GX Eagle?
The difference is clear: the Advent X is the entry point into the Cale platform, while the GX Eagle is a higher-spec version aimed at riders who want a more refined and more performance-focused build from the start.
Is it a good choice as an only MTB?
Yes. For many riders it can work very well as a one-bike hardtail: modern enough to be fun on trails, but versatile enough for long rides and non-gravity-focused use.
Technical specifications – Bombtrack Cale AL Advent X
RockShox 35 Silver R suspension fork, 130 mm travel, tapered 1 1/2" – 1 1/8"
Handlebar
Seido Waypoint double-butted flat bar, 31.8 mm clamp, 9° backsweep
Grips
Bombtrack Return 135 mm lock-on grips
Stem
Seido Chase forged aluminium stem, 0°
Headset
Sealed integrated aheadset, 1 1/2" – 1 1/8"
Brake levers
Tektro Orion HD-M735 hydraulic
Shifter
Microshift Advent X SL-M9505, sealed bearings
Brakes
Tektro Orion HD-M745 hydraulic disc brakes, 4 piston front and rear
Rotors
Tektro 203 mm front and 180 mm rear
Crankset
Bombtrack Ames forged aluminium crank, 24 mm spindle
Bottom bracket
BSA sealed external bottom bracket
Pedals
Not included
Chain
KMC X10 chain, 1/2" x 11/128"
Chainring
Aluminium, narrow-wide, 28 T
Cassette
Microshift CS-H104 10-speed, 11–48 T
Front derailleur
- (not included)
Rear derailleur
Microshift Advent X RD-M6205GM, clutch, long cage
Front hub
Bombtrack Grad Boost sealed hub, 6-bolt disc
Rear hub
Bombtrack Grad Boost sealed hub, HG driver, 6-bolt disc
Thru-axles
15 x 110 mm front / 12 x 148 mm rear
Front rim
WTB ST i29 double-wall, TCS 2.0, 32h
Rear rim
WTB ST i29 double-wall, TCS 2.0, 32h
Saddle
Seido Origin saddle
Seatpost
Seido Yew aluminium seatpost, 30.9 mm x 400 mm
Seat clamp
Bombtrack Prime 34.9 mm
Front tyre
Kenda Hellcat Pro AEC 29" x 2.4" TLR, tubeless ready
Rear tyre
Kenda Hellcat Pro AEC 29" x 2.4" TLR, tubeless ready
Fenders
Not included
Rack
Not included
Kickstand
Not included
Lights
Not included
Bike weight
13.9 kg (size L)
Frameset weight
2100 g frame (size L, incl. thru-axle and hanger)
Maximum rider system weight
140 kg including luggage
ASTM riding condition
4
Note
Final product may vary in appearance, finish and minor details.
Frame standards & geometry
Frame & component standards
Item
Details
BB standard
BSA, 73 mm shell width
Headset standard (S.H.I.S.)
IS42 / 28.6 | IS52 / 40
Headset crown race angle
45°
Fork steerer inner diameter
24.6 mm
Max front tyre clearance (no fender)
27.5" x 2.8" / 29" x 2.6"
Max rear tyre clearance (no fender)
27.5" x 2.8" / 29" x 2.4"
Max chainring size 1x
34 T with 52 mm chainline
Max chainring size 2x
- (not applicable)
Seatpost diameter
30.9 mm
Seat clamp diameter
34.9 mm
Front derailleur clamp diameter
34.9 mm
Frame front derailleur compatible
Yes
Front brake mount
Post Mount 7"
Rear brake mount
Post Mount 6"
Rear brake mount thickness
-
Max rotor size front
220 mm
Max rotor size rear
180 mm
Front thru-axle
15 x 110 mm, 1.5 thread pitch
Rear thru-axle
12 x 148 mm, 1.5 thread pitch
ISO testing standard
MTB
Crank arm length
M 170 mm / L–XL 175 mm
Q-factor
178 mm
Crank BCD
Shimano direct mount
Chainring offset
-
Chainline
55 mm
Front spoke length
292 mm, 293 mm
Rear spoke length
294 mm, 292 mm
Spoke count (front / rear)
32 / 32
ERD
606 mm
Front hub PCD
58 mm
Rear hub PCD
58 mm
Front hub flange distance / offset
61.5 mm centre-to-centre / 3.4 mm
Rear hub flange distance / offset
58.3 mm centre-to-centre / 9.6 mm
Stem length
45 mm
Stem angle
0°
Headset spacers
1 x 10 mm, 2 x 5 mm
Seatpost offset
0 mm
Seatpost length
400 mm
Bike trailer
Approved
Seat tube mounted child seat
Approved
Derailleur hanger
BT-DH-023
Frame small parts
BT-CR-006 / BT-CR-008
Front hub end caps
BT-HC-016
Rear hub end caps
BT-HC-017
Cassette body
BT-CB-006
Crankarm bolt
-
Front thru-axle reference
RockShox Maxle Stealth 15 x 110
Rear thru-axle reference
BT-TA-R-604
Geometry (29" wheels)
Parameter
M
L
XL
Wheel size
29"
29"
29"
Seat tube length (mm)
430
460
500
Horizontal top tube length (mm)
631
655
673
Seat tube angle
74.0°
73.5°
73.5°
Head tube angle
67.5°
67.5°
67°
Head tube length (mm)
120
130
140
BB drop (mm)
55
55
55
Chainstay length (mm)
440
440
449
Fork offset (mm)
44
44
44
Trail (mm)
108
108
111
Wheelbase (mm)
1171
1191
1225
Standover (mm)
789
808
828
Reach (mm)
453
469
484
Stack (mm)
619
628
635
Front centre (mm)
737
756
781
Axle-to-crown (fork) (mm)
509
509
509
Minimum rider height (cm)
170
179
188
Maximum rider height (cm)
181
190
199
¹ Size recommendations based on rider height are indicative guidelines only and should not replace a professional bike fit. ² Values refer to the standard factory build.
Comments (0)
Your review appreciation cannot be sent
Report comment
Report sent
Your report cannot be sent