2023 Specialized Demo Expert vs 2025 Forbidden Supernought
The Forbidden Supernought size closest to your S3 is the S2. Compare the S2 instead
What changes on the Forbidden Supernought
Compared with the Specialized Demo Expert in S3, the Forbidden Supernought in S4 places the top of the head tube 26 mm higher and 42 mm further forward, relative to the bottom bracket. Its wheelbase is 77 mm longer, which can contribute to stability at speed.
- Frame stack
- +26 mm
- Higher front end
- Frame reach
- +42 mm
- Longer frame reach
- Wheelbase
- +77 mm
- Longer: steadier at speed
- Head angle
- +0.3°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Specialized Demo Expert is drawn. The Forbidden Supernought numbers we have for size S4 are missing the chainstay length.
Geometry side by side
| Measurement | Specialized Demo Expert S3 | Forbidden Supernought S4 | Difference |
|---|---|---|---|
| Reach | 446mm | 488 | +42 mm |
| Stack | 632mm | 658 | +26 mm |
| Head tube angle | 62.8° | 63.1 | +0.3° |
| Seat tube angle | 76.8° | 75.8 | −1.0° |
| Chainstay length | 448mm | not listed | |
| Wheelbase | 1259mm | 1336 | +77 mm |
| Seat tube length | 420mm | 470 | +50 mm |
| Head tube length | 105mm | 120 | +15 mm |
| Effective top tube | not listed | 654 | |
| BB drop | not listed | -10.6 | |
| BB height | not listed | 350 | |
| Standover | not listed | 777 |
Differences are the Forbidden Supernought minus the Specialized Demo Expert. Full charts: 2023 Specialized Demo Expert, 2025 Forbidden Supernought.
Where each sits in its class
Specialized Demo ExpertForbidden Supernought
Each bike is ranked against the other downhill bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.
What each ships with
The stock build of each bike's first listed trim. Parts that match are dimmed.
| Part | Specialized Demo ExpertExpert | Forbidden Supernought1 |
|---|---|---|
| Fork | RockShox BoXXer 29 | RockShox BoXXer Ultimate |
| Rear shock | RockShox Super Deluxe Select | RockShox Vivid Coil Ultimate |
| Shifter | SRAM GX DH | SRAM Pod Rocker Controller |
| Derailleur | SRAM GX DH | SRAM XX DH Transmission |
| Cassette | SRAM GX DH | SRAM XX DH |
| Chain | SRAM PC1110 | SRAM X0 Eagle Transmission |
| Crankset | Specialized DESCENDANT DH | SRAM XX DH |
| Bottom bracket | SRAM DUB | SRAM DUB |
| Tire | Specialized Butcher | Maxxis ASSEGAI, Maxxis DHRII |
| Brake | SRAM Code RS | SRAM Maven Silver |
| Stem | Specialized Descendant | Burgtec Direct Mount |
| Saddle | Specialized Henge DH | fizik Gravita Alpaca |
| Frame | not listed | Supernought Full Carbon |
| Chainring | not listed | SRAM 34T |
| Hub | not listed | crankbrothers Synthesis Ratchet |
| Rim | not listed | crankbrothers Synthesis Alloy 2.0 DH |
| Rotor | not listed | SRAM HS2 |
| Handlebar | not listed | Burgtec Ride Wide DH |
| Headset | not listed | Cane Creek 40 |
| Seatpost | not listed | Burgtec Xpress |
| Accessory | not listed | Forbidden HD Guide, E.13 LG1 Plus |
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