IBIS OSO 2023

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. That keeps the Oso from ever feel­ing unwieldy. In fact, it’s pret­ty damn wieldy.
 
Specification
COMPONENT    STANDARD COMPONENT    UPGRADE / OPTION
Fork    Fox Performance Series, Float 38, 170mm, 44mm offset, 29", 110x15mm     
Shock    Fox Performance Elite Series, X2, 205x60mm     
Motor    Bosch Performance Line CX     
Wheels    Blackbird Send I/ Send II, Aluminium, Ibis Hubs, SM-MD: F - 29”/R - 27.5”, LG-XL: F/R - 29”     
Tires    Front: Maxxis Assegai, 29x2.5", Dual Compound, Double Down, TR, WT; Rear: Maxxis Aggressor, 29x2.5", Dual Compound, Double Down, TR, WT
Size SM–MD comes with a 27.5x2.5" rear tire.
 
Brakes    Shimano XT M8120, 4 piston     
Brake Rotors    Shimano SM-RT66, 220mm     
Cranks    SRAM EX1 E-Crank, 34T ring, Ibis spider     
Bottom Bracket    SRAM DUB BSA     
Rear Derailleur    SRAM GX Eagle     
Shift Levers    SRAM GX Eagle     
Cassette    SRAM GX, XG 1275, 10-52     
Chain    SRAM GX Eagle     
Chain Guide    Ibis Top Guide     
Headset    Cane Creek 40 ZS44/ZS56     
Grips    Lizard Skin Charger Evo     
Handlebar    Ibis Carbon Hi Fi, 31.8mm, 800mm     
Stem    Ibis 31.8mm
S/M: 40mm, L: 50mm, XL: 60mm
 
Seatpost    Bike Yoke Revive Dropper
S: 125mm, M: 160mm, L: 185mm, XL: 213mm. Note there is a 250lb rider weight limit on this post.
 
Saddle    SDG Bel-Air, V3
 
                                                               PICK YOUR SIZE
 
 
The Oso doesn’t just lean into enduro territory. It drops in, elbows out and goggles down. 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.
64°HEAD TUBE ANGLE
 
77-79°SEAT TUBE ANGLE
 
439–444mmCHAINSTAYS
170MM FORK (584MM AXLE TO CROWN)
MM / INCHES
NOMINAL SIZE
 
SMALL
MEDIUM
LARGE
X-LARGE
Seat Tube Length
A
394
415
415
427
Top Tube Length
B
573
607
638
669
Head Tube Length (4mm stack of lower cup not included)
C
90
106
122
139
Chainstay Length
D
439
439
444
444
Seat Tube Angle
E
77°
77°
78°
79°
Head Tube Angle
F
64°
64°
64°
64°
Wheelbase
G
1206
1242
1294
1341
BB (L/XL with Maxxis Minion 29x2.5WT tires, S/M with 27.5x2.5WT rear tire).
 
341
341
340
340
BB Drop
 
31
31
31
31
Stack
 
621
635
650
665
Reach
 
430
460
500
540
Saddle Height
 
655
705
765
820
Standover
 
677
714
729
731
Trail
 
132
132
132
132
L/XL comes with Maxxis Minion 29x2.5WT tires, S/M comes with a Maxxis Minion 29x2.5WT front tire and a 27.5x2.5WT rear tire.
SIZING GUIDE (RIDER HEIGHT)
CM / INCHES
S
152–165CM
M
163–175CM
L
173–185CM
XL
183–198CM
Down
SPECS
FAQ
SETUP
DROPPER INSERT