MMR X-Bolt 140 50 10

2025 MountainTrail Electric bicycle Manufacturer page

Travel: 140 / 140 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 34t / 10–51t
Gear range: 510%
Battery: 625 Wh
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–170
MD 168–179
LG 176–187

Components

17 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

X-Bolt - G2 Carbon Concept Frame. Intermediate modulus carbon fiber. Several moulds. TA 12mm. Internal Cable Routing. Boost. PostMount. Full Integrated Battery. Head tube 1.5 Tapered Not identified

Electric system

3 parts

Suspension

2 parts

Drivetrain

5 parts

Brakes

1 part

Brakes
- Shimano Deore XT BR-M8120
BR-M8120

Wheels and tires

2 parts

Cockpit and contact points

4 parts

Sizes and geometry

3 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 450mm

Stack 629mm

Wheelbase 1222mm

Head angle 66.5°

Seat angle 75.0°

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 3 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	425	450	475
Stackmm	616	629	643
Top tube lengthmm	590	618	647
Seat tube lengthmm	406	457	508
Head tube lengthmm	110	125	140
Head tube angle	66.5°	66.5°	66.5°
Seat tube angle	75°	75°	75°
Chainstay lengthmm	457	457	457
Wheelbasemm	1191	1222	1253
Front centermm	736	767	798
Bottom bracket dropmm	30	30	30
Bottom bracket heightmm	344	344	344
Fork rakemm	51	51	51
Trailmm	106	106	106
Stack/reach ratio	1.45	1.40	1.35

Not published by the manufacturer: Standover height, 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

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 140 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: Dropper seatpost
Shifting: Mechanical

Electric system

Battery capacity: 625 Wh

Additional specifications

Battery: Bosch Power Tube 625
Fork spring: Air
Tire width: 2.5″
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

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,808 bicycles with this information
Coverage: 97.5% of the class

Lowest gear

19.3 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,382 bicycles with this information
Coverage: 74.5% 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: 1,382 bicycles with this information
Coverage: 74.5% of the class

Shifting

Mechanical

387 of 1,847 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,847 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: 1382 bicycles with this information, 74.5% of the class
Highest gear: 1382 bicycles with this information, 74.5% 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 2025 builds

Differences across 2025 builds
Specification	This bicycle MMR X-Bolt 140 50 10	MMR X-Bolt 120 00	MMR X-Bolt 120 10	MMR X-Bolt 120 30	MMR X-Bolt 120 Plus 00	MMR X-Bolt 140 00 10
Suspension
Front travel	140 mm	120 mm	120 mm	120 mm	120 mm	140 mm
Drivetrain
Smallest sprocket	10	10	10	11	10	10
Largest sprocket	51	51	52	50	51	51
Lowest gear	19.3 in	19.3 in	19.0 in	19.7 in	19.3 in	19.3 in
Highest gear	98.6 in	98.6 in	98.6 in	89.6 in	98.6 in	98.6 in
Electric bicycle systems
Battery capacity	625 Wh	625 Wh	Not informed	Not informed	Not informed	625 Wh
Other specifications
Rear travel	140 mm	120 mm	120 mm	120 mm	120 mm	140 mm