Ibis Oso Sport 90 Bike 2026Oh So Fast. The Ibis Oso S is the shredder of the Ibis Oso e-MTB lineup - agile, responsive, and at home on tight terrain and flowing singletrack. With 140mm of front travel and 130mm at the rear, it's tuned for riders who want a lively, playful e-MTB feel without giving up capability. The Bosch Performance Line CX Gen 5 motor and 600Wh battery keep the assist punchy and the range solid, while the new bolt-ol modular dropout system lets riders swap out dropouts to fine-tune chainstay length and even wheel size to match their trails. Fast laps just got an upgrade. Features Bosch Performance Line CX Gen 5 motor delivers powerful, natural-feeling pedal assist with refined torque delivery tuned for technical terrain600Wh internal battery with Power More compatibility provides a 850Wh total capacity when paired with the optional 250Wh Power More range extender, with low and centered battery placement for improved balance and handling Modular dropout system with bolt-on dropouts to fine-tune chainstay length and wheel size configuration - all options available aftermarket Rock Shox Pike Base fork, 140mm, 29" and Rock Shox Deluxe Select+ rear shock keep the ride lively and controlled on fast, flowing trails SRAM Eagle 90 Transmission drivetrain with SRAM Maven Base brakes and 220mm centerline rotors front and rear Full 29" wheel setup with Maxxis Assegai EXO+ Maxx Grip 29x2. 5 up front and Maxxis DHR II EXO+ Maxx Terra 29x2. 5 rear across all sizes Long dropper post compatibility with generous seat tube insertion depths across all sizes (KS Vantage, 34. 9mm: SM-MD 140-170mm / XM-XL 180-210mm)Bosch Kiox 400c display with Bosch Mini Remote controller for intuitive ride management SPECIFICATIONSTravel (F/R)140mm Front / 130mm Rear Fork Rock Shox Pike, Base, 140mm, 29"Rear Shock Rock Shox Deluxe Select+, 210x52. 5mm Motor Bosch Performance Line CX, Generation 5Battery Bosch Power Tube 600Wh (Power More 250Wh compatible, 850Wh total)Display Bosch Kiox 400c Controller Bosch Mini Remote Bottle Cage Bosch Power More Holder Shifter SRAM Eagle 90 Transmission Rear Derailleur SRAM Eagle 90 Transmission Cassette SRAM XS 1275 Transmission, T-Type, 10-52TChain SRAM GX Eagle Transmission, T-Type Crankset SRAM X1 E-MTB, 165mm, 34T Steel Chainring Chain Guide MRP TR2 Top Guide Brakes SRAM Maven Base, SRAM Centerline 220mm 6-Bolt Rotors (F/R)Wheelset Blackbird Send Alloy, 32H, 35mm Inner Rim Width, Blackbird Hubs 32H 6-Bolt (F: 110x15mm / R: 148x12mm)Tires Maxxis Assegai EXO+ Maxx Grip 29x2. 5 (Front) / Maxxis DHR II EXO+ Maxx Terra 29x2. 5 (Rear)Handlebar Blackbird 35, Aluminum, 30mm Riser Bar, 800mm Stem Blackbird 35, SM-MD: 35mm / XM-XL: 50mm Grips Lizard Skins Strata Single Clamp Headset Cane Creek 50, ZS56/ZS56Seatpost KS Vantage Dropper, 34. 9mm, SM-MD: 140-170mm / XM-XL: 180-210mm Saddle WTB Solano, Fusion Cr Mo, 142mm Intended Use Trail, E-MTBNote: Components are subject to change without notice. METRICINCHIbis Oso S (140mm Fork) - Metric Size SMMDXMLGXLA: Seat Tube Length381381405432450B: Top Tube Length579604624646665C: Stack614625634644656D: Reach445467489513536E: BB Height329332335338338F: BB Drop4441413835G: Head Tube Length99109121136152H: Head Tube Angle63. 9 deg64. 7 deg64. 7 deg64. 4 deg64. 4 degI: Seat Tube Angle77. 7 deg77. 9 deg78. 4 deg78. 9 deg78. 9 degJ: Standover684697722733750K: Chainstay Length456456457457457L: Wheelbase12271246127613071338Crank Arm Length160 mm160 mm160 mm160 mm160 mm Stem Length35 mm35 mm50 mm50 mm50 mm Handlebar Width800 mm800 mm800 mm800 mm800 mm Suggested Rider Height Frame Size SMMDXMLGXLRider Height152 - 168 cm165 - 175 cm173 - 183 cm180 - 191 cm188 - 201cm Ibis Oso S (140mm Fork) - Imperial Size SMMDXMLGXLA: Seat Tube Length15. 015. 015. 917. 017. 7B: Top Tube Length22. 823. 824. 625. 426. 2C: Stack24. 224. 625. 025. 425. 8D: Reach17. 518. 419. 320. 221. 1E: BB Height13. 013. 113. 213. 313. 3F: BB Drop1. 71. 61. 61. 51. 4G: Head Tube Length3. 94. 34. 85. 46. 0H: Head Tube Angle63. 9 deg64. 7 deg64. 7 deg64. 4 deg64. 4 degI: Seat Tube Angle77. 7 deg77. 9 deg78. 4 deg78. 9 deg78. 9 degJ: Standover26. 927. 428. 428. 929. 5K: Chainstay Length18. 018. 018. 018. 018. 0L: Wheelbase48. 349. 150. 251. 552. 7Crank Arm Length160 mm160 mm160 mm160 mm160 mm Stem Length35 mm35 mm50 mm50 mm50 mm Handlebar Width800 mm800 mm800 mm800 mm800 mm Suggested Rider Height Frame Size SMMDXMLGXLHeight5'0" - 5'6"5'5" - 5'9"5'8" - 6'0"5'11" - 6'3"6'2" - 6'7" | Ibis Bicycles | Oso Sport 90 Bike 2026 | Silver | S