Breezer Thunder

2025 MountainTrail Manufacturer page

Breezer Thunder, color Gray / Burnt Orange

Last known price: $1,649

Prices shown first for United States
Suspension: Rigid
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Weight: 15.8 kg 34.8 lb · Reference configuration not specified
Frame: Steel
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

16 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

Breezer custom-butted-chromoly steel, BSA Threaded BB, Boost 148 x 12mm thru-axle Not identified

Suspension

1 part

Fork

Chromoly disc, rack / fender & side bottle mounts, Boost 110 x 15mm thru-axle Not identified

Drivetrain

7 parts

Bottom bracket
- Shimano
Cassette
- Shimano Deore CS-M6100-12 12 speeds 10–51t
CS-M6100-12
Chain
- Shimano
Crankset
- Shimano Deore 34t
Front derailleur

None
Rear derailleur
- Shimano Deore RD-M6100 12 speeds
RD-M6100
Shifters
- Shimano Deore SL-M6100 12 speeds
SL-M6100

Brakes

2 parts

Brake levers
- Shimano
Brakes
- Shimano BR-MT500
BR-MT500

Wheels and tires

2 parts

Rims
- WTB
Tires
- WTB

Cockpit and contact points

7 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 441mm

Stack 609mm

Wheelbase 1162mm

Head angle 67.7°

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 Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	421	441	455	484
Stackmm	610	609	627	632
Top tube lengthmm	585	610	635	666
Seat tube lengthmm	370	420	470	521
Head tube lengthmm	100	100	120	130
Head tube angle	67.7°	67.7°	67.7°	67.7°
Seat tube angle	75°	74.5°	74°	74°
Chainstay lengthmm	450	450	450	450
Wheelbasemm	1136	1162	1177	1209
Front centermm	696	721	736	768
Bottom bracket dropmm	72	70	70	70
Bottom bracket heightmm	302	304	304	304
Standover heightmm	765.5	785.5	811.5	839.3
Fork rakemm	46	46	46	46
Trailmm	104	98	105	104
Stack/reach ratio	1.45	1.38	1.38	1.31
Suspension and parts
Crank lengthmm	170	175	175	175
Stem lengthmm	45	45	45	65

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel
Bicycle weight: 15.8 kg

34.8 lb

Suspension

Suspension configuration: Rigid

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: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Tire width: 2.5″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

3 measures

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

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Highest gear

98.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Shifting

Mechanical

388 of 1,849 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,849 bicycles with this information
Coverage: 99.6% 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): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2025
Lowest gear: 1384 bicycles with this information, 74.6% of the class
Highest gear: 1384 bicycles with this information, 74.6% of the class