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Oso
A whole new sport calls for a whole new bike.
The full-carbon-fiber Oso features a dw-link rear suspension that optimizes efficiency and control, pairing 155mm of rear travel with 170mm up front. Powered by a Bosch Performance Line CX motor and a 750 Wh battery, the Oso delivers exceptional performance on any terrain—making every ride feel like it’s downhill both ways.
Geometry
The Oso is your trail companion, giving you supernatural climbing and descending ability that changes everything. Available in 4 sizes with amazing standover clearance and a long dropper post, you can comfortably get down almost anything. The slack 64-degree head angle and long wheelbase bring a new level of confidence to your off-road adventures.
Clean Interface
- Controller is integrated into the top tube, reducing cable clutter.
- Low-profile wireless SRAM GX-Transmission shifting.
- Now featuring the bar mounted Bosch wireless mini-remote.
Upgraded Frame Protection
- Beefed up downtube and motor guards—they’re thicker, stronger, and provide more protection.
- Backward compatible for all Oso customers.
Lights When You Need Them
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Pre-wired to accept the included 900 lumen Lupine SL F Nano front light. (Installation required.)
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Comes installed with a 45 lumen Lupine C14 taillight (combination seat collar + rear light combo).
Suspension
- Compatible with select air and coil shocks from Fox, Marzocchi, EXT, DVO, and Ohlins.
- Installing a 205x65mm trunnion shock provides 170mm of rear travel.
- The stock shock can be reconfigured to 65mm stroke during a normal shock service at Fox Factory or a Fox authorized service center.
- Compatible with up to 190mm single-crown or dual crown fork.
Why Bosch?
The Bosch Performance line CX has a quiet, powerful 85 NM drive unit, which offers the most natural-feeling acceleration since the invention of gravity. On top of that, you get Bosch’s two-year warranty, a network of 2,400 dealers across the U.S., UL safety-certified batteries, and its carbon-neutral operations. So, in case you were wondering, that’s why we went with Bosch.
Big Battery, Big adventures
- 750Wh battery for big adventures.
- How far can I go ?
- Powerful and durable Bosch CX Performance motor rules the hills with just the right level of assistance exactly when you want it.
Parts chosen for performance and durability
- Shimano XT brakes with 220mm rotors for confidence inspiring braking.
- SRAM Wireless GX Transmission delivers precision shifting under load.
- Gravity casing tires and durable wheels ensure reliable performance for enduro-level e-bike use.
- The Fox 38 Performance fork and X2 shock keeps it smooth and under control on the roughest of descents.
- The award winning Bike Yoke Revive dropper post is widely acclaimed as one of the best and most durable droppers available.
Build
| Fork | Fox Performance Series, Float 38, 170mm, 29”, 110mm x 15mm |
| Shock | Fox Performance Elite Series X2, 205mm x 60mm |
| Motor | Bosch Performance Line CX |
| Wheels | Blackbird Send Aluminium Rims, Ibis Hubs, SM-MD: 29”/27.5”, LG-XL: 29” |
| Front Tire | Maxxis Assegai, 29” x 2.4”, 3C MaxxGrip, DD, TR |
| Rear Tire | Maxxis Minion DHR II, 29” x 2.4”, 3C MaxxGrip, DD, TR |
| Size SM–MD comes with a 27.5x2.4" rear tire. | |
| Brakes | Shimano XT, M8120, 4 piston |
| Rotors (F/R) | Shimano SM-RT66, 220mm |
| Crankset | SRAM X1 E-MTB, 34t Steel Ring |
| Rear Derailleur | SRAM GX Eagle Transmission |
| Shifter | Eagle AXS Controller |
| Cassette | SRAM GX XS 1275 Eagle Transmission 10-52 |
| Chain | SRAM GX Eagle Transmission |
| Chain Guide | Ibis Top Guide |
| Headset | Cane Creek 40 ZS44/ZS56 |
| Grips | Lizard Skins Charger Evo Single Clamp Lock-On |
| Handlebar | Blackbird HiFi Carbon, 31.8mm, 30mm Rise, 800mm |
| Stem | Ibis 31.8mm |
| S–M: 40mm, L–XL: 50mm | |
| Seatpost | Bike Yoke Revive Dropper 31.6mm |
| SM:125mm, MD: 160mm, LG: 185mm, XL: 213mm |
Pick Your Size
The standover height on the Oso is very low for a bike with this much travel which makes fitting the bike easier. The small Oso is best in class for fitting riders in the 5'0" to 5'4" (152CM - 163CM) range. Large and extra large Oso frames are built around matching 29-inch wheels, while small and medium frames get the mixed-wheel treatment and shorter chainstays.
Geometry
Sizing Guide
Specs
| Version | V1.1 |
| Frame Material | Carbon Fiber |
| Wheel Size | 29” up to 2.5" tires on L/XL, 27.5" up to 2.6" on S/M |
| Front Travel | 170mm forks (approved to 190mm) |
| Rear Travel | 155mm (approved to 170mm) |
| Boost Axles | 148mm rear / 110mm front |
| Seatpost Diameter | 31.6mm |
| Rear Brake | 203mm post mount / 220mm max |
| Chainstay Length | S/M 439mm, L/XL 444mm |
| Bottom Bracket | NA |
| Chainline | 55mm chainline, 182mm Q Factor |
| Chainguide | Compatible with Bosch Smart System Chain Guides (M/L/XL), Gen 4 (S) |
| Headset | ZS44 upper / ZS56 lower |
| Colors | Smokey Black or Grizzly Bronze |
| Sizes | S / M / L / XL |
| Frame Warranty | Lifetime |
| Bushing Warranty | Lifetime |
| Bosch Warranty | 2 Years |
| Motor | Bosch Performance CX |
| Battery | Bosch 750 Wh Powertube (M/L/XL), 625 Wh Powertube (S) |
| Charger | Bosch Smart System Charger |
| Controller | Bosch Integrated top tube controller & bar mounted Bluetooth Mini Controller |
Warranty
- Lifetime frame warranty.
- Lifetime bushing warranty.
- Two year Bosch warranty.
