2026 Ibis Oso S vs 2027 Trek Fuel EX Carbon Gen 7
The Trek Fuel EX Carbon Gen 7 size closest to your XM is the L. Compare the L instead
What changes on the Trek Fuel EX Carbon Gen 7
Compared with the Ibis Oso S in XM, the Trek Fuel EX Carbon Gen 7 in XL places the top of the head tube 17 mm higher and 21 mm further forward, relative to the bottom bracket. Its wheelbase is 22 mm longer, which can contribute to stability at speed.
- Frame stack
- +17 mm
- Higher front end
- Frame reach
- +21 mm
- Longer frame reach
- Wheelbase
- +22 mm
- Longer: steadier at speed
- Head angle
- +0.1°
- About the same head angle
- Chainstays
- −10 mm
- Shorter: livelier
The two frames
Ibis Oso S, XMTrek Fuel EX Carbon Gen 7, XLDrawn to scale and lined up at the bottom bracket.
Geometry side by side
| Measurement | Ibis Oso S XM | Trek Fuel EX Carbon Gen 7 XL | Difference |
|---|---|---|---|
| Reach | 489 | 510 | +21 mm |
| Stack | 634 | 651 | +17 mm |
| Head tube angle | 64.4 | 64.5° | +0.1° |
| Seat tube angle | 77.9 | 76.9° | −1.0° |
| Effective top tube | 624 | 651 | +27 mm |
| Chainstay length | 457 | 447 | −10 mm |
| Wheelbase | 1276 | 1298 | +22 mm |
| BB drop | 41 | 35 | −6 mm |
| BB height | 332 | 339 | +7 mm |
| Standover | 722 | 758 | +36 mm |
| Seat tube length | 405 | 455 | +50 mm |
| Head tube length | 121 | 140 | +19 mm |
Differences are the Trek Fuel EX Carbon Gen 7 minus the Ibis Oso S. Full charts: 2026 Ibis Oso S, 2027 Trek Fuel EX Carbon Gen 7.
Where each sits in its class
Ibis Oso STrek Fuel EX Carbon Gen 7
Each bike is ranked against the other trail 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 | Ibis Oso SS 90 | Trek Fuel EX Carbon Gen 7Carbon Gen 7 |
|---|---|---|
| Frame | Ibis Oso | not listed |
| Fork | RockShox Pike Base | not listed |
| Rear shock | RockShox Deluxe Select+ | Fox Float Factory |
| Shifter | SRAM Eagle 90 Transmission | not listed |
| Derailleur | SRAM Eagle 90 Transmission | not listed |
| Cassette | SRAM GX Eagle Transmission | not listed |
| Chain | SRAM GX Eagle Transmission | not listed |
| Crankset | Race Face Affect R | not listed |
| Chainring | Race Face Affect R | not listed |
| Motor | Bosch Performance Line CX | not listed |
| Battery | Bosch Powertube | not listed |
| Wheelset | Blackbird Send Alloy | not listed |
| Tire | Maxxis Assegai, Maxxis Minion DHR II DD | not listed |
| Brake | SRAM Maven Base | not listed |
| Rotor | SRAM CenterLine | not listed |
| Handlebar | Blackbird 35 | not listed |
| Stem | Blackbird 35 | not listed |
| Grips | Lizard Skins Strata | not listed |
| Headset | Cane Creek 50 | not listed |
| Dropper post | KS Vantage Dropper | not listed |
| Saddle | WTB Solano Fusion | not listed |
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