Stevens Sonora ES

Name: Stevens Sonora ES
Brand: Stevens

2021 MountainCross-country Manufacturer page

Fork travel: 100 mm
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Weight: 10.5 kg 23.1 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

19 of 20 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

Carbon Fiber Not identified

Suspension

2 parts

Fork
- Fox 32
Rear shock

None

Drivetrain

8 parts

Bottom bracket
- Shimano SM-BB92
SM-BB92
Cassette
- Shimano Deore XT CS-M8100-12 12 speeds
CS-M8100-12
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Chain guide

None
Crankset
- Shimano Deore XT FC-M8100 12 speeds
FC-M8100
Front derailleur

None
Rear derailleur
- Shimano Deore XT RD-M8100-SGS 12 speeds
RD-M8100-SGS
Shifters
- Shimano Deore XT SL-M8100
SL-M8100

Brakes

2 parts

Wheels and tires

5 parts

Cockpit and contact points

6 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 18"

Table

Reach 428mm

Stack 606mm

Wheelbase 1100mm

Head angle 70.0°

Seat angle 74.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	405	428	449	472
Stackmm	601	606	620	629
Top tube lengthmm	573	598	623	648
Seat tube lengthmm	396	420	480	520
Head tube lengthmm	95	100	115	125
Head tube angle	70°	70°	70°	70°
Seat tube angle	74.5°	74.5°	74.5°	74.5°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1075	1100	1127	1152
Front centermm	648	673	700	725
Bottom bracket dropmm	65	65	65	65
Bottom bracket heightmm	306	306	306	306
Standover heightmm	734	766	795	826
Fork rakemm	42	42	43	42
Trailmm	92	92	91	92
Stack/reach ratio	1.48	1.42	1.38	1.33

Not published by the manufacturer: 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: Carbon
Bicycle weight: 10.5 kg

23.1 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 34
Largest chainring: 34
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 19.3 in
Highest gear: 98.6 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: BB86/BB92
Fork spring: Air
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,256 bicycles with this information
Coverage: 91.6% of the class

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Highest gear

98.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Shifting

Mechanical

89 of 1,368 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,368 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.4 km/h
Highest gear: 37.8 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: 19.3–98.6 gear inches
Class reference (p10–p90): 17.4–100.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2021
Lowest gear: 1101 bicycles with this information, 80.3% of the class
Highest gear: 1101 bicycles with this information, 80.3% of the class

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 2021 builds
Specification	This bicycle Stevens Sonora ES	Stevens Sonora	Stevens Sonora X0
Frame
Bicycle weight	10.5 kg	12 kg	10.1 kg
Drivetrain
Smallest sprocket	10	11	10
Largest sprocket	51	50	52
Lowest gear	19.3 in	19.7 in	19.0 in
Highest gear	98.6 in	89.6 in	98.6 in
Other specifications
Bottom bracket standard	BB86/BB92	Not informed	Not informed