2025 Forbidden Supernought vs 2024 Specialized Demo Race
The S4 is the Specialized Demo Race size closest to your S3 Forbidden Supernought. We match frame stack and reach. This is a geometry comparison, not a fit recommendation; stem, spacers, handlebars and saddle setup also affect your riding position.
What changes on the Specialized Demo Race
Compared with the Forbidden Supernought in S3, the Specialized Demo Race in S4 places the top of the head tube 17 mm lower and about as far forward, relative to the bottom bracket. Its wheelbase is 11 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −17 mm
- Lower front end
- Frame reach
- ±0 mm
- About the same reach
- Wheelbase
- −11 mm
- Shorter: quicker to change direction
- Head angle
- −0.3°
- Slacker: calmer steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
We can't draw these frames yet. The Forbidden Supernought numbers we have for size S3 are missing the chainstay length. The numbers below still compare.
Geometry side by side
| Measurement | Forbidden Supernought S3 | Specialized Demo Race S4 | Difference |
|---|---|---|---|
| Reach | 466 | 466mm | ±0 mm |
| Stack | 649 | 632mm | −17 mm |
| Head tube angle | 63.1 | 62.8° | −0.3° |
| Seat tube angle | 75.8 | 76.8° | +1.0° |
| Effective top tube | 629 | not listed | |
| Wheelbase | 1295 | 1284mm | −11 mm |
| BB drop | -10.6 | not listed | |
| BB height | 350 | not listed | |
| Standover | 769 | not listed | |
| Seat tube length | 440 | 420mm | −20 mm |
| Head tube length | 110 | 105mm | −5 mm |
| Chainstay length | not listed | 448mm |
Differences are the Specialized Demo Race minus the Forbidden Supernought. Full charts: 2025 Forbidden Supernought, 2024 Specialized Demo Race.
Where each sits in its class
Forbidden SupernoughtSpecialized Demo Race
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 | Forbidden Supernought1 | Specialized Demo Race |
|---|---|---|
| Frame | Supernought Full Carbon | not listed |
| Fork | RockShox BoXXer Ultimate | not listed |
| Rear shock | RockShox Vivid Coil Ultimate | not listed |
| Shifter | SRAM Pod Rocker Controller | not listed |
| Derailleur | SRAM XX DH Transmission | not listed |
| Cassette | SRAM XX DH | not listed |
| Chain | SRAM X0 Eagle Transmission | not listed |
| Crankset | SRAM XX DH | not listed |
| Chainring | SRAM 34T | not listed |
| Bottom bracket | SRAM DUB | not listed |
| Tire | Maxxis ASSEGAI, Maxxis DHRII | not listed |
| Hub | crankbrothers Synthesis Ratchet | not listed |
| Rim | crankbrothers Synthesis Alloy 2.0 DH | not listed |
| Brake | SRAM Maven Silver | not listed |
| Rotor | SRAM HS2 | not listed |
| Handlebar | Burgtec Ride Wide DH | not listed |
| Stem | Burgtec Direct Mount | not listed |
| Headset | Cane Creek 40 | not listed |
| Seatpost | Burgtec Xpress | not listed |
| Saddle | fizik Gravita Alpaca | not listed |
| Accessory | Forbidden HD Guide, E.13 LG1 Plus | not listed |
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