Ibis Oso Sport
Built for fast trail rides, flowing singletrack, and quick after-work laps, the Oso S combines a Bosch Performance Line CX Gen 5 motor, 130mm rear travel, a 140mm fork, 29” wheels, and responsive trail geometry. Designed for riders who want a lighter-feeling, more playful e-MTB, it delivers quick handling, efficient climbing, and plenty of confidence for everyday trail riding.
Key highlights
- 140mm front / 130mm rear travel built for fast trail rides, flowing singletrack, and technical climbs.
- dw-link suspension with V5 kinematics for traction, support, and efficient pedaling.
- 29” wheels across all sizes for roll speed, stability, and confident trail handling.
- SRAM Eagle 90 Transmission designed for durability and shifting under load.
Design and durability
- Carbon frame with 130mm rear travel and Bosch CX Gen 5 drive system.
- Modular chassis allows wheel size, chainstay length, and travel configuration changes.
- Size-specific geometry, chainstay lengths, bottom bracket heights, and suspension kinematics.
- Lifetime frame warranty and lifetime bushing warranty.
Ride characteristics
- Quick, responsive trail feel for riders who want an e-MTB that stays lively.
- Powerful Bosch assist helps make climbs, repeat laps, and longer routes more manageable.
- Stable enough for rougher trails while staying more agile than a longer-travel e-MTB.
- Size-specific design helps maintain consistent handling across the full size range.
What makes the Oso S different
- Bosch Gen 5 power: The Performance Line CX motor delivers quiet, natural-feeling assist with up to 120Nm of torque and a 600% support multiplier.
- 600Wh battery: Internal battery keeps weight lower and centered, with optional PowerMore 250Wh range extender compatibility for up to 850Wh total capacity.
- Fast trail handling: The 140mm front / 130mm rear travel package gives the Oso S a quicker, more playful feel than the longer-travel Oso models.
- Modular dropout system: Bolt-on dropouts and brake mounts allow chainstay length and wheel size configuration changes.
Fit, setup, and recommended upgrades
- We want every rider to get the most out of their new Oso S.
- Local pickup customers: We can help dial in suspension sag, rebound, Bosch system setup, and cockpit position before your first ride.
- Shipped bikes: Bikes arrive professionally assembled and test ridden. Our staff can assist with setup questions if needed.
- Recommended upgrades: Pedals, tire inserts, frame protection, range extender, and brake pad options depending on terrain and riding style.
Ibis Oso S – Full specifications
Frame
| Frame | Carbon fiber, 130mm rear travel, dw-link suspension, Bosch CX Gen 5 compatible |
Suspension
| Fork | RockShox Pike Base, 140mm, 29” |
| Rear shock | RockShox Deluxe Select+, 210x52.5mm |
Motor & battery
| Motor | Bosch Performance Line CX, Generation 5 |
| Battery | 600Wh internal battery, PowerMore 250Wh range extender compatible |
| Display | Bosch Kiox 400c |
Wheels & tires
| Rims | Blackbird Send Alloy, Send I front / Send II rear |
| Front hub | Blackbird Hub |
| Rear hub | Blackbird Hub |
| Tires | Maxxis Assegai 29x2.5 EXO front / Maxxis DHR II 29x2.5 EXO+ rear |
Drivetrain
| Shifter | SRAM Eagle 90 Transmission |
| Rear derailleur | SRAM Eagle 90 Transmission |
| Crankset | SRAM EX1, 160mm, 34T steel ring |
| Cassette | SRAM XS 1275 Transmission T-Type, 10-52T |
| Chain | SRAM GX Eagle Transmission T-Type |
Brakes
| Brakes | SRAM Maven Base |
| Rotors | SRAM Centerline 220mm front / rear, 6-bolt |
Cockpit
| Handlebar | Blackbird 35 Aluminum Riser Bar, 800mm |
| Stem | Blackbird 35 Stem, size-specific length |
| Seatpost | KS Vantage Dropper, 34.9mm, size-specific travel |
| Saddle | WTB Silverado Fusion CrMo 142 |
Sizing and fit
Height ranges are based on Ibis’ recommended sizing chart.
| Frame size | Recommended height |
|---|---|
| Small | 5’0” – 5’6” |
| Medium | 5’5” – 5’9” |
| Extra-Medium | 5’8” – 6’0” |
| Large | 5’11” – 6’3” |
| X-Large | 6’2” – 6’7” |
Frame geometry (mm and degrees) Tap to open chart
| Size | SM | MD | XM | LG | XL |
|---|---|---|---|---|---|
| Wheel size | 29” | 29” | 29” | 29” | 29” |
| Travel (front/rear) | 140 / 130 | ||||
| Reach | 445 | 467 | 489 | 513 | 536 |
| Stack | 614 | 625 | 634 | 644 | 656 |
| Head tube angle | 63.9° | 64.7° | 64.4° | 64.4° | 64.4° |
| Seat tube length | 381 | 381 | 405 | 432 | 450 |
| Seat tube angle | 77.7° | 77.7° | 77.9° | 78.4° | 78.9° |
| Chainstay | 456 | 456 | 457 | 457 | 457 |
| Wheelbase | 1227 | 1246 | 1276 | 1307 | 1338 |
| BB height | 329 | 332 | 332 | 335 | 338 |
| Standover | 684 | 697 | 722 | 733 | 750 |
| Recommended dropper | 140–170 | 140–170 | 180–210 | 180–210 | 180–210 |
| Water bottle | 22oz | 22oz | 26oz | 26oz | 26oz |
Component note: We reserve the right to make changes to product and component information at any time without notice, including equipment, specifications, models, colors, and materials.
