Diablo Carbon Hardtail Mountain Bike
Diablo Carbon Hardtail Mountain Bike
Built to order
Your Cobalt is prepared for you. Timing varies with frame availability, paint, and component selection. Contact us for a current delivery estimate.
Build Ride Inspire
Diablo is built for the rider who sees a climb as a challenge and a ribbon of singletrack as an invitation. Its carbon frame and direct hardtail response make every pedal stroke count, whether you’re chasing an XC finish line, linking trails after work or heading out for a long day in the mountains.
With a 120 mm fork and clearance for 29 × 2.6-inch tires, Diablo pairs XC efficiency with room for a more capable trail setup. It rewards a well-chosen line, accelerates out of corners and keeps you connected to the terrain. Choose your build, dial in your fit and make it yours.
Build Ride Inspire.
Choose your build
| Build | Price (USD) | SRAM drivetrain | Shimano drivetrain | Fork / suspension | Wheels |
|---|---|---|---|---|---|
| Core | $3,499 | Eagle 90 T-Type | Deore 12-speed | SID Select 120 mm | Alloy / value XC |
| Performance | $4,599 | GX Eagle AXS T-Type | XT Di2 Wireless 12-Speed | SID Ultimate 120 mm | Carbon XC |
| Elite | $6,299 | XX SL Eagle AXS T-Type | XTR Di2 Wireless 12-Speed | SID Ultimate 120 mm | Premium carbon XC |
SRAM and Shimano builds share the same tier price. Select your build tier, size and finish, then confirm your drivetrain preference with Cobalt. Saddle, tires, gearing and cockpit can be tailored to fit, terrain and budget. Comparable substitutions and custom work are confirmed before the build is finalized. Photographs show individual builds; components and finishes may differ from your selected package.
Choose your finish
Matte Black / White Decals — Included
Gloss Blue / Black Decals — Included
Custom 1-Color — +$250
Custom 2-Color — +$400
Premium / Complex Paint — Contact us for a quote
Explore custom paint colors and options.
Mountain bike builds include a tubeless setup.
Frame specifications
| Detail | Specification |
|---|---|
| Frame | Toray carbon; 1,050 g |
| Sizes | 15.5, 17.5, 19, 21 |
| Fork | 120 mm baseline; discuss a 130 mm trail setup with Cobalt |
| Tire clearance | 29 × 2.6 in or 27.5 × 2.8 in |
| Bottom bracket | BSA 73 mm threaded |
| Seatpost | 30.9 mm |
| Rear axle | 12 × 148 mm Boost |
| Headset | IS52 |
| Drivetrain | UDH / SRAM T-Type; maximum 36T chainring |
| Brakes & routing | Flat mount with post-mount adapter; 160 mm; internal routing |
Published frame weights are reference values and vary with size and finish.
Geometry & sizing
Use the model-specific chart below with your fit measurements. Dimensions are in millimeters unless shown otherwise.
| Size | Seat tube (mm) | Seat angle (°) | Effective top tube (mm) | Head tube (mm) | Head angle (°) | Fork length (mm) | Fork offset (mm) | Wheelbase (mm) | Front center (mm) | Chainstay (mm) | BB drop (mm) | Stack (mm) | Reach (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 15.5 | 395 | 75 | 575 | 95 | 69 | 506 | 51 | 1102.3 | 679.2 | 430 | 60 | 603.7 | 410.6 |
| 17.5 | 440 | 75 | 600 | 100 | 69 | 506 | 51 | 1127.7 | 704.5 | 430 | 60 | 608.3 | 437 |
| 19 | 480 | 75 | 625 | 115 | 69 | 506 | 51 | 1154 | 730.7 | 430 | 60 | 622.3 | 457.8 |
| 21 | 520 | 75 | 650 | 125 | 69 | 506 | 51 | 1179.7 | 756.3 | 430 | 60 | 631.7 | 480 |
Your Cobalt, your way
Explore standard finishes and custom paint or talk with Cobalt about your build.
Cobalt carbon road, gravel and hardtail frames carry a lifetime frame warranty for the original owner. Read warranty coverage and terms.
Build Ride Inspire
Ordering & delivery
Typical custom builds take about 3–4 weeks to source components, assemble and ship, depending on component availability. Custom paint can take longer. Complete bikes ship free within the lower 48 U.S. states; confirm international and special shipping with Cobalt. Read ordering, assembly and return details.