Steel trail hardtail with 130 mm suspension, GX Eagle drivetrain and higher-end components, built for riders looking for a more refined, stable and long-distance capable Cale. It is the benchmark of the range: more comfortable and more complete than the aluminium versions, ideal for technical trails, long rides and off-road bikepacking without compromise.
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Bombtrack Cale GX Eagle
The Bombtrack Cale GX Eagle is the steel version of the Cale platform: a modern hardtail built to push you deeper into the backcountry while still feeling fast and fun on your local trails. A double-butted 4130 crmo frame, RockShox Revelation RC 130 mm fork, Sram GX Eagle 12-speed drivetrain and KS dropper post all come together in a bike that’s ready for technical singletrack, alpine loops and loaded overnighters.
4130 double-butted crmo steel frame with Boost spacing, thru-axles, rack and fender mounts, and stealth routing for a dropper seatpost.
RockShox Revelation RC, 130 mm travel for more control and adjustability when trails get rough and fast.
Sram GX Eagle 1x12 drivetrain with a 30 T chainring and 10–52 T cassette – huge range for steep loaded climbs and fast transitions.
Sram Guide RE hydraulic disc brakes with Centerline 200 / 180 mm rotors for powerful, modulated braking on long descents.
WTB ST i29 29" rims with Maxxis Ardent 29" x 2.4" tubeless ready tyres – fast rolling, with enough bite for mixed terrain.
KS E20i dropper post with 150 mm of travel so you can get the saddle out of the way at the press of a lever.
Metallic Burgundy paint that highlights the steel tubeset with a deep, premium finish.
Within the Cale family, the GX Eagle is the benchmark steel trail bike: a stable, precise and adventure-ready hardtail designed for riders who want one bike to cover everything from demanding trail riding to multi-day off-road trips.
Performance & ideal terrain
The Cale GX Eagle is a steel trail hardtail at heart: long and stable with a compact rear end, giving you confidence at speed and agility when the trail tightens up. The 130 mm fork and 29" wheels make it a natural fit for technical trails, big mountain rides and ambitious bikepacking routes.
How it rides on and off-road
Climbing: the 30 / 10–52 T gear range lets you spin up steep gradients, even with bags on the bike, while the steel frame smooths out trail chatter.
Descending: a slack head angle, Revelation RC fork and 2.4" tyres give you grip and control through rock gardens, roots and fast corners.
Mixed terrain: 29" wheels and the Ardent’s rolling profile keep you moving quickly on forest roads, doubletrack and the inevitable bits of tarmac between trails.
Best for
Trail centres and all-mountain riding with technical sections and long descents.
Alpine routes with varied terrain, from smooth forest loam to rocky ridges.
Off-road bikepacking if you want a comfortable, durable steel frame with plenty of mounts.
Trail / All-Mountain: run the Maxxis Ardent 29" x 2.4" tubeless at moderate to low pressures, keep the Bombtrack Illusion 35 mm bar and short Seido Drift stem for maximum control and stability when things get steep.
Adventure & bikepacking: use the frame and fork mounts for extra bottle cages and bags, add a light rear rack if needed, and consider a slightly faster-rolling rear tyre if your routes include long hardpack or gravel sections.
All-weather / rugged commuting: fit compatible fenders and a rear rack; the 2.4" tyres deliver comfort and grip on wet, broken or unpaved roads.
Many descriptions present the Cale GX Eagle as Bombtrack’s benchmark steel trail bike, combining a multi-butted 4130 frame with a 130 mm RockShox Revelation fork for a capable, confidence-inspiring ride on demanding terrain.
The package of GX Eagle 12-speed drivetrain and 10–52 T cassette is often highlighted as ideal for riders who want a truly wide gear range – low enough for loaded climbs, yet still able to keep pace on faster sections.
Reviewers frequently point out the Sram Guide RE brakes with large Centerline rotors as a serious choice for trail and all-mountain use, offering strong and consistent braking on long, technical descents.
The combination of 29" WTB rims, Maxxis Ardent tyres and a KS dropper post is commonly seen as a ready-to-ride setup: you can head straight to the trail or load up for a weekend trip with no urgent need for upgrades.
Bombtrack Cale GX Eagle – size guide
Size
Min. rider height (cm)
Max. rider height (cm)
Notes
M
170
181
Great if you prefer a slightly more compact, playful position.
L
179
190
Balanced choice for trail / all-mountain riding and bikepacking.
XL
188
199
For taller riders who want extra reach and stability at speed.
These height-based size suggestions are general guidelines to help you narrow down the options. A proper fit also depends on your inseam, torso and arm length, flexibility and riding style.
Because no two riders are exactly the same, there’s no recommendation that will be 100% accurate for everyone. The most reliable way to choose your size is to combine these guidelines with a more detailed look at your measurements or, if needed, a professional bike fit.
Bikejamming size & setup support
Not sure between two sizes or how to set up the Cale GX Eagle for your kind of riding? Email us at info@bikejamming.it and tell us how and where you ride: we’ll help you pick the right size, dial in your setup and suggest possible upgrades based on real-world use.
CTA
The Bombtrack Cale GX Eagle – Metallic Burgundy is for you if you want a steel hardtail that can handle proper trail riding, big days in the mountains and loaded bikepacking trips, without giving up comfort or control on long descents.
Wondering which size suits you best, or how to tune the build for your local terrain and trips? Get in touch at info@bikejamming.it: we can help you choose tyres, upgrades (wheels, cockpit, brakes), luggage solutions and cockpit setup so your Cale GX Eagle feels truly made for you.
Ready to push deeper into the trails? Configure your Cale GX Eagle and point it towards the first singletrack you have in mind.
Frequently asked questions and answers about the Bombtrack Cale GX Eagle
What kind of bike is the Cale GX Eagle?
It is a modern steel trail hardtail with 130 mm suspension and a higher-spec build. It is designed for demanding trail riding and long-distance use, including loaded rides.
What is the difference between the Cale GX Eagle and the aluminium versions?
The key difference is the steel frame, which offers more comfort and a smoother ride feel, combined with a more refined overall build. It is a more complete bike for longer and more demanding use.
Is it better for trail riding or bikepacking?
Both. It is built as a true trail bike, but the steel frame and mounting options make it particularly well suited for more demanding off-road bikepacking over multiple days.
How does it perform on technical trails?
Very well. The RockShox Revelation fork, Guide RE brakes and stable geometry make it more confident on long descents, rocky sections and faster trails.
Is it a good choice as a one-bike solution?
Yes, especially for riders who want a hardtail that can truly cover everything: trail riding, alpine rides, long distances and off-road travel, with added comfort compared to aluminium.
What is the difference between the Cale GX Eagle and the Cale AL SX Eagle?
The AL SX Eagle is more direct and trail-focused with an aluminium frame. The GX Eagle adds comfort, higher component quality and better suitability for longer, more demanding rides.
Why choose steel on a modern hardtail?
Because it provides better vibration damping and a more natural ride feel over long distances and rough terrain, while still maintaining precision on technical sections.
Technical specifications – Bombtrack Cale GX Eagle
KS E20i dropper seatpost, 30.9 mm, 150 mm travel, 474 mm length
Seat clamp
Bombtrack Origin 34.9 mm
Front tyre
Maxxis Ardent 29" x 2.4" TLR, tubeless ready
Rear tyre
Maxxis Ardent 29" x 2.4" TLR, tubeless ready
Fenders
Not included
Rack
Not included
Kickstand
Not included
Lights
Not included
Bike weight
13.8 kg (size M)
Frameset weight
2910 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.)
ZS44 / 28.6 | EC44 / 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"
Maximum chainring size 1x
32 T with 52 mm chainline
Maximum 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
IS
Frame thickness rear brake mount
-
Maximum rotor size front
220 mm
Maximum 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
Crankarm length
S–M 170 mm / L–XL 175 mm
Q-factor
172 mm
Crank BCD
Direct mount (Sram compatible)
Chainring offset
3 mm
Chainline
52 mm
Front spoke length
293 mm, 294 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 / 64 mm
Front hub flange distance / offset
61.5 mm centre to centre / 3.4 mm
Rear hub flange distance / offset
56.4 mm centre to centre / 9.2 mm
Stem length
40 mm
Stem angle
0°
Headset spacers
1 x 10 mm, 2 x 5 mm
Seatpost offset
0 mm
Seatpost length
474 mm, 150 mm travel
Bike trailer
Approved
Seat tube mounted child seat
Approved
Derailleur hanger
BT-DH-008
Frame small parts
BT-CR-006 / BT-CR-008
Front hub end caps
BT-HC-016
Rear hub end caps
BT-HC-019
Cassette body
BT-CB-010
Crankarm bolt
-
Front thru-axle reference
RockShox Maxle Stealth 15 x 110
Rear thru-axle reference
BT-TA-R-603
Geometry (29" wheels)
Parameter
M
L
XL
Wheel size
29"
29"
29"
Seat tube length (mm)
430
460
500
Horizontal top tube length (mm)
608
633
648
Seat tube angle
74.0°
73.5°
73.5°
Effective seat tube angle
74.0°
73.5°
73.5°
Head tube angle
67.0°
67.0°
67.5°
Head tube length (mm)
110
120
125
BB drop (mm)
55
55
55
Chainstay length (mm)
440
440
440
Fork offset (mm)
42
42
42
Trail (mm)
114
114
110
Wheelbase (mm)
1150
1170
1180
Standover (mm)
783
802
825
Reach (mm)
433
450
463
Stack (mm)
610
619
627
Front centre (mm)
721
741
750
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 general guidelines and should not replace a professional bike fit. ² Values refer to the standard factory build.
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