Stevens Tonga

Name: Stevens Tonga
Brand: Stevens

2025 MountainCross-country Manufacturer page

Price: Not published

Prices shown first for United States
Europe: €749 Last known price
Fork travel: 100 mm
Wheels: 27.5″
Drivetrain: 2 × 9 22–36t / 11–36t
Gear range: 536%
Weight: 14.3 kg 31.5 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

18 of 21 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

Aluminium 6061, O.L.D.: 135 mm, Brake: IS disc, BB: BSA 73 mm, Front derailleur mount: clamp, Cable routing: external, Rack mounts Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket

BSA, 73mm, threaded Not identified
Cassette
- SunRace 32–36t
Chain
- Shimano CN-HG53
CN-HG53
Crankset
- Shimano FC-MT210-2 9 speeds 22t
FC-MT210
Front derailleur
- Shimano FD-M2020-TS
FD-M2020-TS
Rear derailleur
- SunRace
Shifters
- Shimano Acera SL-M3010
SL-M3010

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Handlebar
- Oxygen
Headset
- Stevens
Pedals

ATB Pro Reflex Not identified
Saddle
- Oxygen
Seatpost
- Oxygen
Stem
- Oxygen

Sizes and geometry

5 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 415mm

Stack 608mm

Wheelbase 1104mm

Head angle 70.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	385	409	415	432	449
Stackmm	558	562	608	618	632
Top tube lengthmm	540	565	595	615	635
Seat tube lengthmm	325	374	402	453	503
Head tube lengthmm	90	95	100	110	125
Head tube angle	69°	69°	70°	70°	70°
Seat tube angle	74.5°	74.5°	73.5°	73.5°	73.5°
Chainstay lengthmm	435	435	450	450	450
Wheelbasemm	1057	1083	1104	1125	1146
Front centermm	627	653	663	684	705
Bottom bracket dropmm	50	50	70	70	70
Bottom bracket heightmm	301	301	301	301	301
Standover heightmm	705	735	770	803	838
Fork rakemm	42	42	46	46	46
Trailmm	91	91	80	80	82
Stack/reach ratio	1.45	1.37	1.47	1.43	1.41
Suspension and parts
Crank lengthmm	170	170	175	175	175
Stem lengthmm	70	70	90	110	120
Stem angle	6°	6°	6°	6°	6°

Not published by the manufacturer: Front travel, Rear travel, Handlebar width, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Bicycle weight: 14.3 kg

31.5 lb
Weight limit: 115 kg

253.5 lb

Suspension

Suspension configuration: Hardtail
Front travel: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 16.8 in
Highest gear: 90.0 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
Fork spring: Coil
Tire width: 57c
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

2 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: 2025
Sample: 1,508 bicycles with this information
Coverage: 87.8% of the class

Shifting

Mechanical

222 of 1,648 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2025
Sample: 1,648 bicycles with this information
Coverage: 95.9% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 34.5 km/h

Total gear range 535%

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.