2026 Mondraker Summum RR 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
- −8 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- −10 mm
- Shorter: livelier
The two frames
Only the Mondraker Summum RR is drawn. The Trek Session numbers we have for size R2 are missing the reach, stack and seat angle.
Geometry side by side
| Measurement | Mondraker Summum RR M | Trek Session R2 | Difference |
|---|---|---|---|
| Reach | 450 mm | not listed | |
| Stack | 642.6 mm | not listed | |
| Head tube angle | 62.5° | 63 | +0.5° |
| Seat tube angle | 68° | not listed | |
| Effective top tube | 709.63 mm | 618 | −92 mm |
| Chainstay length | 455 mm | 445 | −10 mm |
| Wheelbase | 1285.38 mm | 1277 | −8 mm |
| BB drop | 5 mm | not listed | |
| BB height | 350.5 mm | not listed | |
| Seat tube length | 400 mm | not listed | |
| Fork length | 601.9 mm | not listed | |
| Head tube length | 120 mm | not listed | |
| Standover | not listed | 751 |
Differences are the Trek Session minus the Mondraker Summum RR. Full charts: 2026 Mondraker Summum RR, 2025 Trek Session.
Where each sits in its class
Mondraker Summum RRTrek 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 | Mondraker Summum RRRR | Trek Session8 |
|---|---|---|
| Frame | Mondraker Summum MX | Trek Session 8 |
| Fork | RockShox Boxxer 29 Ultimate | RockShox BoXXer |
| Rear shock | RockShox Vivid | Marzocchi Bomber |
| Shifter | SRAM Pod Controller | not listed |
| Derailleur | SRAM XX DH AXS | not listed |
| Cassette | SRAM 797 | SRAM GX DH |
| Chain | SRAM X0 Eagle Transmission | SRAM PC 1110 |
| Crankset | SRAM XX DH Transmission | TruVativ Descendant GX |
| Bottom bracket | SRAM DUB | not listed |
| Tire | Maxxis Assegai 29” x 2.5” WT, Maxxis Minion DHR II 27''5x2.5 WT | Bontrager G5 Team Issue, Bontrager G5 |
| Hub | DT Swiss 350, DT Swiss 350 Classic | not listed |
| Rim | DT Swiss EX1700 Classic 29 | not listed |
| Brake | SRAM Maven Ultimate | SRAM Code RSC |
| Handlebar | Onoff S6 1.0 7050 alloy | Bontrager Line |
| Stem | Onoff S9 DH CNC Integrated | Bontrager Line |
| Grips | Onoff Desert | not listed |
| Headset | Onoff DH ARS (Adjustable Reach System) 1-1/8" | not listed |
| Seatpost | Onoff S3 DH Alloy | Bontrager Rhythm Elite |
| Saddle | Ergon SM10 DH | Bontrager Arvada |
| Chainring | not listed | TruVativ 34 |
| Pedals | not listed | Wellgo BO-87B |
| Wheelset | not listed | Bontrager Line DH 30 |
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