bc40

Shimano XTR M9100 Bike

Current lead time 7-9 weeks.

$8,985

Over two years in the making. Thoughtfully designed for speed, agility, and beauty. Painstakingly tested and refined on the iconic singletrack in our own backyard. Made entirely here in the United States, by us, with unparalleled precision and passion. Inspired by the legendary Back 40 trail system. Meet the new BC40, a thoughtfully engineered modern cross-country machine, mixed with an all-day trail sled. A plush 120mm of front and rear travel combined with a second-to-none pedaling platform and progressive geometry delivers precise speed, handling, and tracking for the needs of the modern trail shredder. 


  • In-house development and testing, including building our own testing methodology and machines, and tearing apart our competitors' bikes to weigh every part and benchmark performance. 
  • Designed to stretch the capability of what a cross-country bike can do while making no compromises with weight and pedaling efficiency.  
  • Every piece of carbon is meticulously cut, stacked, formed, and molded to hit the highest possible quality standard. 
  • Aluminum suspension linkage and floating brake mount machined in-house to ensure the highest precision for fitment and alignment. 
  • Built to exceed the expectations of multi-time Olympians and national champions, for ultimate performance at the highest level of competition.
  • Inspired by decades of riding and racing, and purpose-built for the hundreds of miles of trails in our backyard.


Key Features

FRAMESET WEIGHT
1950 grams (Lrg)
GEOMETRY
A slacker front headtube angle for predictable handling at speed across buff and technical terrain. A longer front-to-center measurement shifts the weight of the rider further behind the front wheel for more control to maneuver at high speeds.
SUSPENSION
Designed for 120mm front and rear travel, can be adjusted down to 100mm for optimal terrain performance. Faux bar system (four bar flex stay) kinematic designed for pedaling efficiency.
COMPATIBILITY
Cable management at the headtube allows for easy compatibility across components, including dropper posts and remote lockouts.
BOTTLE MOUNTS
Capable of carrying 2, 1 on the downtube and 1 on the seat tube
TIRE CLEARANCE
29x2.4

Build Kit

BOTTOM BRACKET
Shimano XTR SM-BB93 BSA
BRAKES
Shimano XTR BR-M9100 180 Front / 160 Rear
CASSETTE
Shimano XTR M9101 12spd 10-51
CHAIN
Shimano XTR CN-M9100 12spd
CRANKSET
Shimano XTR FC-M9120-1
FRONT DERAILLEUR
N/A
HANDLEBAR
FSA SL-K MTB Carbon
HANDLEBAR TAPE
ESI Chunky
REAR DERAILLEUR
Shimano XTR RD-M9100 12spd SGS
SADDLE
Selle Italia Novus Boost
SEATPOST
Fox Transfer Factory 31.6
SHIFT LEVERS
Shimano XTR SL-M9100-1-R 12spd
STEM
Industry Nine A318
TIRES
MAXXIS Rekon 29x2.40 WT EXO/TR Tan Wall
WHEELSET
Industry Nine 1/1 Trail S Carbon Wheelset

Sizing Guide

SM MD LG XL
Crankset 170 170 175 175
Stem 40 50 50 50

Frame Geometry

SM MD LG XL
A. Stack 598 609 622 633
B. Reach 420 445 475 501
C. Front Center 710 739 775 806
D. Seat Tube Angle 76 76 76 76
E. Wheel Size 29" 29" 29" 29"
F. Headtube Angle 66.5 66.5 66.5 66.5
G. Fork Rake 44 44 44 44
H. Head Tube Length 95 105 120 135
I. Bottom Bracket Drop 40 40 40 40
J. Wheelbase 1145 1174 1210 1241
K. Chainstay Length 435 435 435 435
L. Horizontal Top Tube 569 596 630 659
M. Seat Tube Length 395 420 450 500
Have a Question?

Lightweight Frame

When traversing countless steep pitches, weight matters. The target 1950g frame weight is achieved by careful placement of the most advanced composite materials available and countless hours iterating and testing to ensure ride performance, durability and strength are all in perfect balance.

Lightweight BC40 on path

Lightweight Frame

When traversing countless steep pitches, weight matters. The target 1950g frame weight is achieved by careful placement of the most advanced composite materials available and countless hours iterating and testing to ensure ride performance, durability and strength are all in perfect balance.

Two Bottle Mounts

Hydration is critical on any long ride or race. The BC40 design allows for a full size bottle on the downtube and small bottle on the seat tube.

Two Bottle Mounts

Two Bottle Mounts

Hydration is critical on any long ride or race. The BC40 design allows for a full size bottle on the downtube and small bottle on the seat tube.

Aggressive Geometry

The needs and capabilities of a modern cross country bike have completely evolved. BC40 pushes the envelope of race worthy bikes with a 66.5 degree headtube angle and 76 degree seat tube angle to allow you to optimize your weight well behind the front wheel for descending and further forward when climbing in the saddle.

Aggressive BC40 geometry on trail

Aggressive Geometry

The needs and capabilities of a modern cross country bike have completely evolved. BC40 pushes the envelope of race worthy bikes with a 66.5 degree headtube angle and 76 degree seat tube angle to allow you to optimize your weight well behind the front wheel for descending and further forward when climbing in the saddle.

Made Here

Like all ALLIED bikes, the BC40 is carefully crafted one frame at a time in our headquarters in Bentonville, AR to ensure each bike is built to the highest standard of quality possible.

Carbon fiber and tooling in Allied factory

Made Here

Like all ALLIED bikes, the BC40 is carefully crafted one frame at a time in our headquarters in Bentonville, AR to ensure each bike is built to the highest standard of quality possible.

120mm Travel

BC40 bolsters a full 120mm of travel front and rear with kinematics carefully positioned for pedaling efficiency and easy tunability.

120mm travel rear suspension

120mm Travel

BC40 bolsters a full 120mm of travel front and rear with kinematics carefully positioned for pedaling efficiency and easy tunability.

Customer Reviews

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M
Matthew Gill
Sheer bliss

I love my bike. I love it so very much. Everything from the XTR groupset to the slick I9 wheels, the super light frame and speed with which I can get up climbs and the feel of way more than 120mm of travel. So slick. I haven't even mention the color. Yeah, I ponied up the extra $5hundo for the harlequin green to purple fade and it was one of the better decisions I've made. Ever. This thing damn near changes color as I stare at it. When I'm busting my ass on a sweetspot interval, I can't help but look down and know I'm riding the prettiest bike this side of the Appalachians. Love it. Get yerself on one of this sleighs, you won't regret it.

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