2025 YT Tues Core vs 2025 Trek Session
We can't match sizes for these two: one of them has no stack and reach for the sizes shown.
What changes on the Trek Session
- Frame stack
- n/a
- One of the bikes has no number for this
- Frame reach
- n/a
- One of the bikes has no number for this
- Wheelbase
- −30 mm
- Shorter: quicker to change direction
- Head angle
- −0.2°
- About the same head angle
- Chainstays
- −2 mm
- About the same
The two frames
Only the YT Tues Core is drawn. The Trek Session numbers we have for size R1 are missing the reach, stack and seat angle.
Geometry side by side
| Measurement | YT Tues Core L | Trek Session R1 | Difference |
|---|---|---|---|
| Reach | 470 | not listed | |
| Stack | 644mm | not listed | |
| Head tube angle | 63.2 | 63 | −0.2° |
| Seat tube angle | 76.5 | not listed | |
| Chainstay length | 441mm | 439 | −2 mm |
| Wheelbase | 1276mm | 1246 | −30 mm |
| BB drop | 25 | not listed | |
| Effective top tube | not listed | 587 | |
| Standover | not listed | 747 |
Differences are the Trek Session minus the YT Tues Core. Full charts: 2025 YT Tues Core, 2025 Trek Session.
Where each sits in its class
YT Tues CoreTrek Session
AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted
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 | YT Tues CoreCore 1 | Trek Session8 |
|---|---|---|
| Frame | YT Ultra Modulus Carbon | Trek Session 8 |
| Fork | Marzocchi Bomber 58 | RockShox BoXXer |
| Rear shock | Marzocchi Bomber CR | Marzocchi Bomber |
| Shifter | TruVativ Descendant GX | not listed |
| Crankset | TruVativ Descendant GX | TruVativ Descendant GX |
| Wheelset | 27.5 inch Aluminum | Bontrager Line DH 30 |
| Tire | Maxxis Assegai | Bontrager G5 Team Issue, Bontrager G5 |
| Brake | SRAM DB8 Stealth | SRAM Code RSC |
| Handlebar | Race Face Chester | Bontrager Line |
| Stem | Race Face Chester | Bontrager Line |
| Seatpost | SDG I-Beam | Bontrager Rhythm Elite |
| Saddle | SDG I-Fly 2.0 | Bontrager Arvada |
| Cassette | not listed | SRAM GX DH |
| Chain | not listed | SRAM PC 1110 |
| Chainring | not listed | TruVativ 34 |
| Pedals | not listed | Wellgo BO-87B |
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