2026 Commencal FRS ROCKSHOX 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
- +4 mm
- Longer: steadier at speed
- Head angle
- −1.0°
- Slacker: calmer steering
- Chainstays
- +10 mm
- Longer: more planted
The two frames
Only the Commencal FRS ROCKSHOX is drawn. The Trek Session numbers we have for size R2 are missing the reach, stack and seat angle.
Geometry side by side
| Measurement | Commencal FRS ROCKSHOX L | Trek Session R2 | Difference |
|---|---|---|---|
| Reach | 490 mm | not listed | |
| Stack | 613 mm | not listed | |
| Head tube angle | 64° | 63 | −1.0° |
| Seat tube angle | 63° | not listed | |
| Effective top tube | 638 mm | 618 | −20 mm |
| Chainstay length | 435 mm | 445 | +10 mm |
| Wheelbase | 1273 mm | 1277 | +4 mm |
| BB drop | 7 mm | not listed | |
| Seat tube length | 420 mm | not listed | |
| Fork length | 581 mm | not listed | |
| Head tube length | 125 mm | not listed | |
| Standover | not listed | 751 |
Differences are the Trek Session minus the Commencal FRS ROCKSHOX. Full charts: 2026 Commencal FRS ROCKSHOX, 2025 Trek Session.
Where each sits in its class
Commencal FRS ROCKSHOXTrek 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 | Commencal FRS ROCKSHOXROCKSHOX | Trek Session8 |
|---|---|---|
| Frame | Commencal FRS | Trek Session 8 |
| Fork | RockShox BoXXer Ultimate | RockShox BoXXer |
| Rear shock | RockShox Vivid Ultimate | Marzocchi Bomber |
| Shifter | SRAM GX DH | not listed |
| Derailleur | SRAM GX DH | not listed |
| Cassette | SRAM GX DH | SRAM GX DH |
| Chain | KMC X11EL | SRAM PC 1110 |
| Crankset | SRAM Descendant DH | TruVativ Descendant GX |
| Bottom bracket | e*thirteen BB107 | not listed |
| Tire | Maxxis Assegai, Maxxis Minion DHR II | Bontrager G5 Team Issue, Bontrager G5 |
| Hub | DT Swiss 370 Classic LN | not listed |
| Rim | DT Swiss F1900 Classic | not listed |
| Brake | TRP DH-R EVO Pro | SRAM Code RSC |
| Handlebar | Ride Alpha R27 | Bontrager Line |
| Stem | Ride Alpha DH 40 | Bontrager Line |
| Grips | Ride Alpha Mushroom | not listed |
| Headset | Acros ZS44/ZS56 | not listed |
| Saddle | fizik Gravita Alpaca X5 | Bontrager Arvada |
| Accessory | e*thirteen Vario | not listed |
| Chainring | not listed | TruVativ 34 |
| Pedals | not listed | Wellgo BO-87B |
| Wheelset | not listed | Bontrager Line DH 30 |
| Seatpost | not listed | Bontrager Rhythm Elite |
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