2018 Trek Session 9.9 DH 27.5 Race Shop Limited vs 2018 Specialized Demo 8 Frameset
The M is the Specialized Demo 8 Frameset size closest to your M Trek Session 9.9 DH 27.5 Race Shop Limited. 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 8 Frameset
Compared with the Trek Session 9.9 DH 27.5 Race Shop Limited in M, the Specialized Demo 8 Frameset in M places the top of the head tube at about the same height and 9 mm further back, relative to the bottom bracket. Its wheelbase is 27 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- −9 mm
- Shorter frame reach
- Wheelbase
- −27 mm
- Shorter: quicker to change direction
- Head angle
- ±0.0°
- About the same head angle
- Chainstays
- −15 mm
- Shorter: livelier
The two frames
Trek Session 9.9 DH 27.5 Race Shop Limited, MSpecialized Demo 8 Frameset, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Session 9.9 DH 27.5 Race Shop Limited M | Specialized Demo 8 Frameset M | Difference |
|---|---|---|---|
| Reach | 429 | 420mm | −9 mm |
| Stack | 616 | 614mm | −2 mm |
| Head tube angle | 63.5° | 63.5° | ±0.0° |
| Seat tube angle | 74.5° | 74° | −0.5° |
| Effective top tube | 585 | 596mm | +11 mm |
| Chainstay length | 445 | 430mm | −15 mm |
| Wheelbase | 1235 | 1208mm | −27 mm |
| BB drop | 2 | 12mm | +10 mm |
| BB height | 356 | 342mm | −14 mm |
| Standover | 739 | 698mm | −41 mm |
| Seat tube length | 425 | 367mm | −58 mm |
| Head tube length | 115 | 105mm | −10 mm |
| Fork length | not listed | 590mm |
Differences are the Specialized Demo 8 Frameset minus the Trek Session 9.9 DH 27.5 Race Shop Limited. Full charts: 2018 Trek Session 9.9 DH 27.5 Race Shop Limited, 2018 Specialized Demo 8 Frameset.
Where each sits in its class
Trek Session 9.9 DH 27.5 Race Shop LimitedSpecialized Demo 8 Frameset
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 | Trek Session 9.9 DH 27.5 Race Shop Limited9.9 DH 27.5 Race Shop Limited | Specialized Demo 8 FramesetS-Works Frameset |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox 40 Factory | not listed |
| Shifter | Shimano Saint | not listed |
| Derailleur | Shimano Saint | not listed |
| Cassette | Shimano Ultegra | not listed |
| Chain | Shimano XTR | not listed |
| Crankset | Shimano Saint | not listed |
| Pedals | Wellgo MG-1 | not listed |
| Wheelset | DT Swiss FR1950 Gravity Classic | not listed |
| Tire | Bontrager G4 Team Issue | not listed |
| Brake | Shimano XT M820 Saint | not listed |
| Handlebar | Bontrager Line | not listed |
| Stem | Bontrager Line | not listed |
| Headset | FSA Orbit | not listed |
| Seatpost | Bontrager Rhythm Elite | not listed |
| Saddle | Bontrager Evoke 3 | not listed |
| Rear shock | not listed | Öhlins TTX |
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