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2025 Allied

bc40 frameset

A 29″ carbon frame full suspension trail frameset.

Manufacturer Price

$4,000
Weight2.0 kg (frame)  
FrameCarbon
SuspensionFull, 120 / 120mm
Wheels29″
BrakesHydraulic Disc
View on alliedcycleworks.comLearn about Allied
Where to Buy
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Insights
Sizing
SM

158cm – 171cm

MD

168cm – 180cm

LG

178cm – 189cm

XL

186cm – 199cm

🐐 Estimated

Rider Fit Notes

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Reviews

Summary

The Allied BC40 is a highly customizable, USA-made trail bike that excels in efficiency and climbing, with a 120mm rear suspension capable of handling a variety of terrains. Its design and production in Rogers, Arkansas, ensure quality and control over every aspect of the bike. While it offers competitive performance and unique customization options, its price point and slightly heavier frame weight are noted drawbacks.

Pros
  • USA-made with full control over production

  • Highly customizable with unique paint options

  • Efficient pedaling platform and climbing capability

  • 120mm rear suspension versatile for various terrains

  • Designed and built in-house for quality assurance

Cons
  • High starting price

  • Frame weight is heavier than some competitors

  • Limited production capacity

Key Quotes
Our mission is to make the best, and the only way to make the best is to do it yourself.
Bicycling
I’m literally riding a wave of support
Pinkbike
The BC40 was the perfect Crested Butte bike
VeloNews logoVeloNews

Feedback?

View all reviews

Bikerumor
Updated: Allied Adds Ultra-light + Adjustable DUET Cockpit System, Lighter BC40 & Signs Courtney!

Jan 2025 · Jordan Villella

Allied Cycle Works has announced a partnership with cross-country mountain bike champion Kate Courtney and her She Sends Racing program.

Read Review

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.

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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
Fork

120mm / 530 Axle to Crown

Travel120mm

Bottom Bracket

73mm Threaded

Stem

-

Handlebar

-

Saddle

-

Seatpost

31.6 or 30.9

TypeRigid

Groupset
Rear Derailleur

UDH Compatible

Front Derailleur

-

Crank

Boost Chainline

Shifters

-

Cassette

-

Chain

-

Brakes

Post Mount 160

TypeHydraulic Disc

Wheels
Rims

-

Tires

29x2.4 max

Rider Notes
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First added 8 June

Last updated 11 April

Not listed for 48 days