Otso Arctodus SLX

2026 MountainFat bike Manufacturer page

Last known price: $2,395

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 12 30t / 10–51t
Gear range: 510%
Weight: 15.6 kg 34.4 lb · Reference configuration not specified
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 144.8–167
MD 164–177
LG 174–187
XL 184–200.7

Components

10 of 18 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Chromoly with Tuning Chip™️ dropout system Not identified

Suspension

1 part

Fork

Lithic full carbon fork, 15mm thru axle Not identified

Drivetrain

7 parts

Bottom bracket
- Race Face
Cassette
- Shimano SLX CS-M7100-12 12 speeds 10–51t
CS-M7100-12
Chain
- Shimano SLX CN-M7100
CN-M7100
Crankset
- Race Face Aeffect 30t
Front derailleur

None
Rear derailleur
- Shimano SLX RD-M7100 12 speeds
RD-M7100
Shifters
- Shimano SLX SL-M7100
SL-M7100

Brakes

2 parts

Brakes
- Shimano Deore BL-M4100
BL-M4100
Disc rotors

74mm post (160mm native, 180mm max) Not identified

Wheels and tires

2 parts

Rims

Lithic Cryolite 100, 26", 97mm inner width, 150x15 thru axle front, 197x12 thru axle rear Not identified
Tires
- Schwalbe Al Mighty

Cockpit and contact points

6 parts

Grips
- Wolf Tooth
Handlebar

Aluminum, 31.8mm x 780mm, 20mm rise Not identified
Headset

ZS44 upper, EC44 lower Not identified
Saddle
- WTB Silverado
Seatpost

Aluminum, 31.6mm x 400mm Not identified
Stem

Aluminum +/- 7, 60mm S | 70mm M | 80mm L | 90mm XL Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

The drawing needs seat tube angle, which the manufacturer did not publish. Available facts remain in the table.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	415	435	455	475
Stackmm	607	607	617	635
Top tube lengthmm	589	610	632	657
Seat tube lengthmm	380	420	465	510
Head tube lengthmm	90	90	100	120
Head tube angle	68.5°	68.5°	68.5°	68.5°
Chainstay lengthmm	440	440	440	440
Wheelbasemm	1119	1140	1162	1189
Front centermm	691	712	734	761
Bottom bracket dropmm	80	80	80	80
Bottom bracket heightmm	263	263	263	263
Standover heightmm	707	736	773	810
Fork rakemm	51	51	51	51
Trailmm	94	94	94	94
Stack/reach ratio	1.46	1.40	1.36	1.34

Not published by the manufacturer: Seat tube angle, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Carbon
Bicycle weight: 15.6 kg

34.4 lb
Weight limit: 124.74 kg

275.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 15.3 in
Highest gear: 78.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 4.8″
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 5.9 km/h
Highest gear: 29.9 km/h

Total gear range 510%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 15.3–78.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2026 builds
Specification	This bicycle Otso Arctodus SLX	Otso Arctodus 1x12 Shimano SLX M7100	Otso Arctodus 1x12 Shimano XT M8100	Otso Arctodus 1x12 SRAM GX Eagle	Otso Arctodus 1x12 SRAM GX Eagle AXS	Otso Arctodus 1x12 SRAM X01 Eagle AXS
Frame
Fork material	Carbon	Not informed	Not informed	Not informed	Not informed	Not informed
Bicycle weight	15.6 kg	Not informed	Not informed	Not informed	Not informed	Not informed
Frame weight	Not informed	3.41 kg	3.41 kg	3.41 kg	3.41 kg	3.41 kg
Suspension
Suspension configuration	Rigid	Not informed	Not informed	Not informed	Not informed	Not informed
Drivetrain
Smallest chainring	30	30	30	28	28	28
Largest chainring	30	30	30	28	28	28
Largest sprocket	51	51	51	52	52	52
Lowest gear	15.3 in	16.2 in	16.2 in	14.8 in	14.8 in	14.8 in
Highest gear	78.0 in	82.5 in	82.5 in	77.0 in	77.0 in	77.0 in
Other specifications
Suspension	Rigid	Not informed	Not informed	Not informed	Not informed	Not informed
Travel	Configuration: Rigid	Not informed	Not informed	Not informed	Not informed	Not informed
Wheel size	26″	27.5″	27.5″	27.5″	27.5″	27.5″