Ibis Oso HD 90
Built for shuttle laps, big mountain lines, and fast technical descents, the Oso HD 90 combines a Bosch Performance Line CX Gen 5 motor, 165mm rear travel, a 180mm fork, and gravity-focused geometry. Designed for riders who want to descend hard and get back to the top for another lap, it delivers downhill confidence while maintaining the support and efficiency expected from an Ibis e-MTB.
Key highlights
- 180mm front / 165mm rear travel built for fast, technical descents and big terrain.
- dw-link suspension with V5 kinematics for traction, support, and efficient pedaling.
- Mixed or 29” wheel configurations depending on frame size, with modular dropout options.
- SRAM Eagle 90 Transmission designed for durability and shifting under load.
Design and durability
- Carbon frame with 165mm 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
- Stable and composed on steep, rough descents.
- Powerful Bosch assist helps turn big climbs into repeat laps.
- Long travel and gravity-focused geometry give the bike a planted feel at speed.
- Size-specific design helps maintain consistent handling across the full size range.
What makes the Oso HD 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.
- Extra-Medium sizing: Ibis adds an XM size in the middle of the range to improve fit options for more riders.
- 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 HD.
- 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, and brake pad options depending on terrain and riding style.
Ibis Oso HD 90 – Full specifications
Frame
| Frame | Carbon fiber, 165mm rear travel, dw-link suspension, Bosch CX Gen 5 compatible |
Suspension
| Fork | Fox Factory 38 Grip X2, 180mm, 29” |
| Rear shock | Fox Factory Float X2, 230x65mm |
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 DD MaxxGrip 29x2.5 front / Maxxis DHR II DD MaxxTerra 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 Silver |
| 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 | MX | MX | MX | 29” | 29” |
| Travel (front/rear) | 180 / 165 | ||||
| Reach | 428 | 450 | 474 | 498 | 522 |
| Stack | 626 | 637 | 646 | 656 | 668 |
| Head tube angle | 62.3° | 63.1° | 63.1° | 63.1° | 63.1° |
| Seat tube length | 381 | 381 | 405 | 432 | 450 |
| Seat tube angle | 76.1° | 76.1° | 76.6° | 77.1° | 77.6° |
| Chainstay | 440 | 440 | 455 | 455 | 455 |
| Wheelbase | 1233 | 1251 | 1295 | 1325 | 1357 |
| BB height | 346 | 349 | 352 | 355 | 358 |
| Standover | 706 | 717 | 745 | 755 | 771 |
| 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.
