Allied BC40 XT M8100

Name: Allied BC40 XT M8100
Brand: Allied

2023 MountainTrail Manufacturer page

Last known price: $7,725

Prices shown first for United States
Travel: 120 / 120 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 10–51t
Gear range: 510%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

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

Components

13 of 13 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.

Drivetrain

7 parts

Bottom bracket
- Shimano
BB-MT8000
Cassette
- Shimano Deore XT CS-M8100 12 speeds
CS-M8100
Chain
- Shimano Deore XT CN-M8100
CN-M8100
Crankset
- Shimano Deore XT FC-M8100-1 12 speeds
FC-M8100
Front derailleur

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

Brakes

1 part

Brakes
- Shimano Deore XT BR-M8100
BR-M8100

Wheels and tires

2 parts

Cockpit and contact points

4 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 445mm

Stack 609mm

Wheelbase 1174mm

Head angle 66.5°

Seat angle 76.0°

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	420	445	475	501
Stackmm	598	609	622	633
Top tube lengthmm	569	596	630	659
Seat tube lengthmm	395	420	450	500
Head tube lengthmm	95	105	120	135
Head tube angle	66.5°	66.5°	66.5°	66.5°
Seat tube angle	76°	76°	76°	76°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1145	1174	1210	1241
Front centermm	710	739	775	806
Bottom bracket dropmm	40	40	40	40
Bottom bracket heightmm	334	334	334	334
Fork rakemm	44	44	44	44
Trailmm	114	115	114	114
Stack/reach ratio	1.42	1.37	1.31	1.26

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
Frame weight: 1.95 kg

4.3 lb

Suspension

Suspension configuration: Full suspension
Front travel: 120 mm
Rear travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51

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 clearance: Maximum tire width: 2.4″
Tire width: 2.4″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

2 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2023
Sample: 2,195 bicycles with this information
Coverage: 97.5% of the class

Shifting

Mechanical

359 of 2,251 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2023
Sample: 2,251 bicycles with this information
Coverage: 100.0% 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 2023 builds
Specification	This bicycle Allied BC40 XT M8100	Allied BC40 GX Eagle AXS	Allied BC40 Shimano XT M8100	Allied BC40 Shimano XTR M9100	Allied BC40 SRAM GX Eagle AXS	Allied BC40 SRAM GX Eagle Transmission
Drivetrain
Largest sprocket	51	52	51	51	52	52
Cockpit
Shifting	Mechanical	Electronic	Mechanical	Mechanical	Electronic	Electronic
Other specifications
Wheel material	Aluminum	Aluminum	Aluminum	Carbon	Aluminum	Aluminum