2026 Ibis Oso S vs 2026 GT Sensor ST Carbon Pro
The XL is the GT Sensor ST Carbon Pro size closest to your XL Ibis Oso S. 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 GT Sensor ST Carbon Pro
Compared with the Ibis Oso S in XL, the GT Sensor ST Carbon Pro in XL places the top of the head tube 9 mm lower and 16 mm further back, relative to the bottom bracket. Its wheelbase is 53 mm shorter, which can contribute to quicker direction changes.
- Frame stack
- −9 mm
- Lower front end
- Frame reach
- −16 mm
- Shorter frame reach
- Wheelbase
- −53 mm
- Shorter: quicker to change direction
- Head angle
- +1.0°
- Steeper: sharper steering
- Chainstays
- n/a
- One of the bikes has no number for this
The two frames
Only the Ibis Oso S is drawn. The GT Sensor ST Carbon Pro numbers we have for size XL are missing the chainstay length.
Geometry side by side
| Measurement | Ibis Oso S XL | GT Sensor ST Carbon Pro XL | Difference |
|---|---|---|---|
| Reach | 536 | 520 | −16 mm |
| Stack | 656 | 647 | −9 mm |
| Head tube angle | 64.4 | 65.4 | +1.0° |
| Seat tube angle | 78.9 | 77.4 | −1.5° |
| Effective top tube | 665 | 664 | −1 mm |
| Chainstay length | 457 | not listed | |
| Wheelbase | 1338 | 1285 | −53 mm |
| BB drop | 35 | not listed | |
| BB height | 338 | not listed | |
| Standover | 750 | 741 | −9 mm |
| Seat tube length | 450 | 460 | +10 mm |
| Head tube length | 152 | not listed |
Differences are the GT Sensor ST Carbon Pro minus the Ibis Oso S. Full charts: 2026 Ibis Oso S, 2026 GT Sensor ST Carbon Pro.
Where each sits in its class
Ibis Oso SGT Sensor ST Carbon Pro
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 | GT Sensor ST Carbon ProST Carbon Pro |
|---|---|---|
| Frame | Ibis Oso | GT Sensor |
| Fork | RockShox Pike Base | RockShox Pike Select+ |
| Rear shock | RockShox Deluxe Select+ | RockShox Deluxe Select+ |
| Shifter | SRAM Eagle 90 Transmission | SRAM NX Eagle |
| Derailleur | SRAM Eagle 90 Transmission | SRAM GX AXS |
| Cassette | SRAM GX Eagle Transmission | SRAM PG |
| Chain | SRAM GX Eagle Transmission | SRAM NX Eagle |
| Crankset | Race Face Affect R | TruVativ Stylo |
| Chainring | Race Face Affect R | not listed |
| Motor | Bosch Performance Line CX | not listed |
| Battery | Bosch Powertube | not listed |
| Wheelset | Blackbird Send Alloy | WTB KOM Trail |
| Tire | Maxxis Assegai, Maxxis Minion DHR II DD | Maxxis Dissector, Maxxis Rekon |
| Brake | SRAM Maven Base | SRAM G2 RSC |
| Rotor | SRAM CenterLine | SRAM G2 |
| Handlebar | Blackbird 35 | GT Alloy Riser |
| Stem | Blackbird 35 | not listed |
| Grips | Lizard Skins Strata | GT Mushroom |
| Headset | Cane Creek 50 | FSA 42 |
| Dropper post | KS Vantage Dropper | not listed |
| Saddle | WTB Solano Fusion | WTB Silverado |
| Bottom bracket | not listed | SRAM DUB BSA |
| Seatpost | not listed | GT DropKick |
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