2027 Trek Session AL vs 2025 Mondraker Summum R Mullet
The M is the Mondraker Summum R Mullet size closest to your R1 Trek Session AL. 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 Mondraker Summum R Mullet
Compared with the Trek Session AL in R1, the Mondraker Summum R Mullet in M places the top of the head tube at about the same height and 3 mm further forward, relative to the bottom bracket. Its wheelbase is 27 mm longer, which can contribute to stability at speed.
- Frame stack
- −2 mm
- About the same height
- Frame reach
- +3 mm
- Longer frame reach
- Wheelbase
- +27 mm
- Longer: steadier at speed
- Head angle
- −0.1°
- About the same head angle
- Chainstays
- +15 mm
- Longer: more planted
The two frames
Trek Session AL, R1Mondraker Summum R Mullet, MDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Trek Session AL R1 | Mondraker Summum R Mullet M | Difference |
|---|---|---|---|
| Reach | 447 | 450 mm | +3 mm |
| Stack | 634 | 632 mm | −2 mm |
| Head tube angle | 63.6° | 63.5° | −0.1° |
| Seat tube angle | 77.1° | 77° | −0.1° |
| Effective top tube | 586 | 596 mm | +10 mm |
| Chainstay length | 435 | 450 mm | +15 mm |
| Wheelbase | 1243 | 1270 mm | +27 mm |
| BB drop | 12 | not listed | |
| BB height | 359 | 350 mm | −9 mm |
| Standover | 755 | not listed | |
| Seat tube length | 425 | 400 mm | −25 mm |
| Head tube length | 117 | 112 mm | −5 mm |
Differences are the Mondraker Summum R Mullet minus the Trek Session AL. Full charts: 2027 Trek Session AL, 2025 Mondraker Summum R Mullet.
Where each sits in its class
Trek Session ALMondraker Summum R Mullet
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 ALAL | Mondraker Summum R MulletR Mullet |
|---|---|---|
| Rear shock | Marzocchi Bomber | Fox DHX2 Performance elite |
| Fork | not listed | Fox Float GRIP Performance |
| Shifter | not listed | SRAM GX DH |
| Derailleur | not listed | e*thirteen Vario, SRAM GX DH |
| Cassette | not listed | SRAM GX DH |
| Chain | not listed | SRAM PC1110 |
| Crankset | not listed | SRAM Truvativ Descendant DH |
| Bottom bracket | not listed | SRAM DUB |
| Tire | not listed | Maxxis Assegai 29” x 2.5” WT, Maxxis Dissector 27''5x2.4 WT |
| Hub | not listed | Mavic Boost |
| Rim | not listed | Mavic Deemax BikePark 29 |
| Brake | not listed | SRAM DB 8 |
| Handlebar | not listed | Onoff S3 1.0 6061 alloy |
| Stem | not listed | Onoff S9 DH CNC Integrated |
| Grips | not listed | Onoff Beehive |
| Headset | not listed | Onoff ZS56/ZS56 |
| Seatpost | not listed | Onoff S3 DH Alloy |
| Saddle | not listed | Ergon SM10 DH |
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