2018 Trek Session 29 Frameset vs 2019 Specialized Demo Expert 29
The S2 is the Specialized Demo Expert 29 size closest to your M Trek Session 29 Frameset. 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 Expert 29
Compared with the Trek Session 29 Frameset in M, the Specialized Demo Expert 29 in S2 places the top of the head tube 17 mm higher and 5 mm further forward, relative to the bottom bracket. Its wheelbase is 4 mm longer, which can contribute to stability at speed.
- Frame stack
- +17 mm
- Higher front end
- Frame reach
- +5 mm
- Longer frame reach
- Wheelbase
- +4 mm
- Longer: steadier at speed
- Head angle
- +0.1°
- About the same head angle
- Chainstays
- −2 mm
- About the same
The two frames
We can't draw these frames yet. The Trek Session 29 Frameset numbers we have for size M are missing the seat angle. The numbers below still compare.
Geometry side by side
| Measurement | Trek Session 29 Frameset M | Specialized Demo Expert 29 S2 | Difference |
|---|---|---|---|
| Reach | 420 | 425mm | +5 mm |
| Stack | 616 | 633mm | +17 mm |
| Head tube angle | 62.6° | 62.7° | +0.1° |
| Effective top tube | 587 | 563mm | −24 mm |
| Chainstay length | 452 | 450mm | −2 mm |
| Wheelbase | 1247 | 1251mm | +4 mm |
| BB drop | 16 | 25mm | +9 mm |
| BB height | 356 | 350mm | −6 mm |
| Standover | 742 | 760mm | +18 mm |
| Seat tube length | 425 | 394mm | −31 mm |
| Head tube length | 115 | 105mm | −10 mm |
| Seat tube angle | not listed | 77.7° |
Differences are the Specialized Demo Expert 29 minus the Trek Session 29 Frameset. Full charts: 2018 Trek Session 29 Frameset, 2019 Specialized Demo Expert 29.
Where each sits in its class
Trek Session 29 FramesetSpecialized Demo Expert 29
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 29 Frameset29 Frameset | Specialized Demo Expert 29Expert 29 |
|---|---|---|
| Frame | Trek OCLV | not listed |
| Fork | Fox 40 Factory | RockShox BoXXer RC 29 |
| Headset | FSA Orbit | not listed |
| Rear shock | not listed | RockShox Super Deluxe RC World |
| Shifter | not listed | SRAM GX |
| Derailleur | not listed | SRAM GX |
| Cassette | not listed | SRAM PG-1030 |
| Chain | not listed | SRAM PC-1031 |
| Crankset | not listed | SRAM Descendant |
| Tire | not listed | Specialized Butcher BLCK DMND |
| Brake | not listed | SRAM Code R |
| Stem | not listed | Specialized two-piece |
| Grips | not listed | Specialized Sip Grip |
| Saddle | not listed | Specialized Henge DH |
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