2026 Mondraker Summum R 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
- −99 mm
- Shorter: quicker to change direction
- Head angle
- +0.5°
- Steeper: sharper steering
- Chainstays
- −16 mm
- Shorter: livelier
The two frames
Only the Mondraker Summum R is drawn. The Trek Session numbers we have for size R1 are missing the reach, stack and seat angle.
Geometry side by side
| Measurement | Mondraker Summum R XL | Trek Session R1 | Difference |
|---|---|---|---|
| Reach | 510 | 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 | 769.63 mm | 587 | −183 mm |
| Chainstay length | 455 mm | 439 | −16 mm |
| Wheelbase | 1345.38 mm | 1246 | −99 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 | 747 |
Differences are the Trek Session minus the Mondraker Summum R. Full charts: 2026 Mondraker Summum R, 2025 Trek Session.
Where each sits in its class
Mondraker Summum RTrek 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 RR | Trek Session8 |
|---|---|---|
| Frame | Mondraker Summum MX | Trek Session 8 |
| Fork | Fox Float GRIP Performance | RockShox BoXXer |
| Rear shock | Fox DHX2 Performance elite | Marzocchi Bomber |
| Shifter | SRAM GX DH | not listed |
| Derailleur | SRAM GX DH | not listed |
| Cassette | SRAM GX DH | SRAM GX DH |
| Chain | SRAM PC1110 | SRAM PC 1110 |
| Crankset | SRAM Truvativ Descendant DH | TruVativ Descendant GX |
| Chainring | SRAM X-Sync | TruVativ 34 |
| Bottom bracket | SRAM DUB | not listed |
| Wheelset | E*thirteen Grappler Flux | Bontrager Line DH 30 |
| Tire | Maxxis Assegai 29” x 2.5” WT, Maxxis Minion DHR II 27''5x2.5 WT | Bontrager G5 Team Issue, Bontrager G5 |
| Hub | e*thirteen Boost, e*thirteen Sidekick | not listed |
| Rim | e*thirteen Grappler Flux | not listed |
| Brake | SRAM Maven Base | SRAM Code RSC |
| Rotor | Centerline XR | not listed |
| 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) | not listed |
| Seatpost | Onoff S3 DH Alloy | Bontrager Rhythm Elite |
| Saddle | Ergon SM10 DH | Bontrager Arvada |
| Pedals | not listed | Wellgo BO-87B |
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