Agile, responsive, and playful — driven by the Bosch CX Gen 5 motor, the Oso S is made for tight terrain and flowing singletrack. It’s intuitive handling turns every ride into a fast, fun session on your favorite local trails.

Modular Chassis
Swap the shock, clevis, and fork to configure any of the three travel options. Compatible with both 29” and 27.5” wheels, with adjustable chainstay length for further ride tuning.
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Modular Dropout System
Bolt-on dropouts and brake mounts let riders fine-tune chainstay length and wheel size configuration.

For 29” rear wheels, Oso sizes SM, MD, XM, LG, and XL all ship with the 455mm dropout. Both 29” dropout sizes, 455mm and 465mm, will be available aftermarket.
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Bosch Performance Line CX Drive Unit
Bosch’s Gen 5 motor delivers quiet, powerful, natural-feeling pedal assist with refined torque delivery for technical terrain. Features Gen 5 performance with [Top Secret] Nm of torque and a strong power multiplier, all backed by Bosch’s trusted service network.
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Bosch Water Bottle Cage
Ships with a Bosch water bottle cage and PowerMore range extender battery mounting bracket.
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Kiox 400C Display
Included as standard, providing a best-in-class user interface and ride metrics.
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Battery System
Features a 600Wh internal battery and is compatible with the optional PowerMore 250Wh range extender battery, sold separately, for a total capacity of 850Wh.

The low, centered battery placement improves balance and handling. The 600Wh battery provides sufficient range for most rides while keeping system weight lower. Adding the PowerMore unlocks longer routes and all-day epics. A thoughtfully positioned charge port allows use of the shortest PowerMore cable for clean, fuss-free integration.
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Long Dropper Posts
An uninterrupted seat tube design maximizes insertion depth, allowing long-travel dropper posts across the full size range.
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Size-Specific Everything
Delivers consistent handling and ride feel across all frame sizes, SM through XL, by tailoring geometry, chainstay lengths, bottom bracket heights, and suspension kinematics to each size.
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5 Sizes
We added a third size in the middle of the bell curve to provide a fit that feels just right. With 80% of riders falling between 5’5” and 6’0”, we introduced a new Extra Medium size. Extra Medium, or size 3, now sits in the middle of the size range, while size 5 remains the traditional XL.
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DW-Link Suspension
Ibis Cycles uses the dw-link suspension system, designed by Dave Weagle, across its full-suspension lineup to deliver exceptional pedaling efficiency and traction.
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Generous Tire Clearance
Fits most 2.5” tires.
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Warranty
If it’s our fault, we’ll fix it. Simple as that.

Lifetime frame warranty.
Lifetime bushing warranty.
Two-year Bosch warranty.

Specifications: