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2022 Allied

BC40 XT M8100

A 29″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price

$7,225
Weight4.3 lbs (frame)  
FrameCarbon
SuspensionFull, 120 / 120mm
Wheels29″ Aluminum
Drivetrain1 × 12
GroupsetXT
BrakesShimano XT Hydraulic Disc
SeatpostDropper
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
BC40 XT M8100
Other Trail bikes
Sizing
SM

5'2" – 5'8"

MD

5'6" – 5'11"

LG

5'10" – 6'3"

XL

6'1" – 6'7"

🐐 Estimated

Rider Fit Notes

None yet.

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Reviews

Summary

The Allied BC40 is a versatile trail bike praised for its USA-made quality, customizable options, and efficient performance. Its 120mm rear suspension and modern geometry make it capable on a variety of terrains, from XC racing to linking roads to singletrack. While it excels in pedaling efficiency and descending prowess, some note its front-end could be more forgiving on steep descents.

Pros
  • USA-made with customizable options

  • Efficient pedaling platform

  • 120mm rear suspension versatile for various terrains

  • Modern geometry for intuitive handling

  • High-quality build and paint options

Cons
  • Front-end less forgiving on steep descents

  • Higher starting price point

  • Claimed frame weight slightly heavier than some competitors

Key Quotes
Our mission is to make the best, and the only way to make the best is to do it yourself.
Bicycling
The BC40 is a sprightly bike, adjacent to a modern cross-country racing bike.
Bicycling
The BC40 has many of the characteristics that would make it a great XC race bike, but it’s also so much more.
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Escape Collective
Allied Cycle Works BC40 review: The modern marathon machine - Escape Collective

Dec 2023 · James Huang

The distillation of the perfect downcountry bike, as interpreted by boutique American builder Allied Cycle Works.

Highs
  • Truly incredible pedaling efficiency

  • Balanced handling

  • Excellent frame stiffness

  • Gorgeous lines

  • Heaps of options

  • Small-batch pedigree

  • Not as expensive as you think.

Lows
  • So-so small-bump compliance

  • Bottle clearance could be better

  • Only four sizes

  • Needlessly oversized cockpit.

Read Review

VeloNews
Review: All I want for Christmas is an Allied BC40

Dec 2022 · Betsy Welch

The playful, efficient, and capable mountain bike from Arkansas brought me so much joy to ride in 2022.

Read Review

Pinkbike
LEA DAVISON’S CUSTOM ALLIED BC40

Nov 2022 · Allied Cycle Works

“I want to race, meet people, be competitive and have fun. I’ve already done so much. I’ve been to two Olympics, have two World Championship medals, raced on the World Cup scene for 20 years, and deserve some time to have fun and race my bike. This season has been a return to why I got into bike racing in the first place.”

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Singletracks
A Conversation About the Eye-Popping Allied BC40 Cross-Country Bike

Oct 2022 · Matt Miller

The Allied BC40 is a short travel 29er that's made for long distance singletrack rides and setting personal FKTs. We tested the bike on its home trails in Arkansas.

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Bicycling
Fast, Competitive, and Made in the USA: Bicycling Takes an Exclusive First Ride on Allied’s New BC40 Trail Bike

Jul 2022

The BC40 is Allied's new 120mm carbon full suspension trail bike with a racing edge. It is light and competitive even in the face of very stiff competition. And it’s made in the USA.

Highs
  • USA-made

  • 120mm or 100mm travel

  • Paint options

  • Descending prowess

Read Review

Geometry
Specs
Build
Bottom Bracket

Shimano XT BB-MT8000 BSA

Stem

FSA Gradient

Handlebar

FSA SL-K MTB Carbon

Saddle

Selle Italia Novus Boost

Seatpost

Fox Transfer Performance 31.6

TypeDropper

Groupset
Rear Derailleur

Shimano XT RD-M8100 12spd SGS

Front Derailleur

N/A

Crank

Shimano XT FC-M8100-1

Shifters

Shimano XT SL-M8100-1-R 12spd

Cassette

Shimano XT CS-M8100 12spd 10-51

Chain

Shimano XT CN-M8100 12spd

Brakes

Shimano XT BR-M8100 180mm/160mm

TypeShimano XT Hydraulic Disc

Wheels
Rims

Industry Nine 1/1 Trail S Wheelset

Tires

MAXXIS Rekon 29x2.40 WT EXO/TR Tan Wall

Rider Notes
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First added July 20

Last updated February 11

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