Salsa Blackthorn 125 C GX Transmission

Name: Salsa Blackthorn 125 C GX Transmission
Brand: Salsa

2026 MountainTrail Manufacturer page

Last known price: $7,499

Prices shown first for United States
Fork travel: 140 mm
Wheels: 29″
Drivetrain: 1 × 12 30t / 10–52t
Gear range: 520%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 157–170
MD 168–180
LG 178–191
XL 188–201

Components

20 of 22 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

Blackthorn 125 Carbon, Carbon Not identified

Suspension

2 parts

Drivetrain

8 parts

Brakes

3 parts

Brake levers
- SRAM Maven Silver
Brakes
- SRAM Maven Silver
Disc rotors

74mm post-mount (180–200mm rotor) Not identified

Wheels and tires

4 parts

Front hub
- WTB
Rear hub
- WTB
Rims
- WTB
Tires
- Teravail

Cockpit and contact points

5 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 482mm

Stack 614mm

Wheelbase 1236mm

Head angle 64.7°

Seat angle 78.3°

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	462	482	502	521
Stackmm	605	614	623	632
Top tube lengthmm	587	609	631	653
Seat tube lengthmm	405	430	455	480
Head tube lengthmm	100	110	120	130
Head tube angle	64.7°	64.7°	64.7°	64.7°
Seat tube angle	78.3°	78.3°	78.3°	78.2°
Chainstay lengthmm	432	432	432	432
Wheelbasemm	1210	1236	1260	1283
Front centermm	780	806	830	853
Bottom bracket dropmm	32	31	31	31
Bottom bracket heightmm	344	345	345	345
Standover heightmm	736	736	737	737
Fork rakemm	43	43	43	43
Trailmm	131	129	129	129
Stack/reach ratio	1.31	1.27	1.24	1.21
Suspension and parts
Crank lengthmm	165	165	165	165
Handlebar widthmm	760	800	800	800
Stem lengthmm	40	40	40	40

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 52
Lowest gear: 16.7 in
Highest gear: 87.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Dropper seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BSA
Tire width: 2.5″
Wheel material: Carbon
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

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,640 bicycles with this information
Coverage: 96.3% of the class

Lowest gear

16.7 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Highest gear

87.0 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,227 bicycles with this information
Coverage: 72.0% of the class

Shifting

Electronic

388 of 1,702 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,702 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.4 km/h
Highest gear: 33.3 km/h

Total gear range 520%

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: 16.7–87.0 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: 2026
Lowest gear: 1227 bicycles with this information, 72.0% of the class
Highest gear: 1227 bicycles with this information, 72.0% 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 2026 builds
Specification	This bicycle Salsa Blackthorn 125 C GX Transmission	Salsa Blackthorn 125 C Eagle 90 Transmission	Salsa Blackthorn 125 Eagle 70 Transmission	Salsa Blackthorn 145 C Eagle 90 Transmission	Salsa Blackthorn 145 Eagle 70 Transmission
Frame
Frame material	Carbon	Carbon	Aluminum	Carbon	Aluminum
Suspension
Front travel	140 mm	140 mm	140 mm	160 mm	160 mm
Cockpit
Shifting	Electronic	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Wheel material	Carbon	Aluminum	Aluminum	Aluminum	Aluminum
Fork spring	Not informed	Air	Air	Air	Air