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Today’s DealsBC40 XT M8100
A 29″ carbon frame full suspension trail bike with high-end components.
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Manufacturer Price
$7,225| Weight | 4.3 lbs (frame) |
|---|---|
| Frame | Carbon |
| Suspension | Full, 120 / 120mm |
| Wheels | 29″ Aluminum |
| Drivetrain | 1 × 12 |
| Groupset | XT |
| Brakes | Shimano XT Hydraulic Disc |
| Seatpost | Dropper |
5'2" – 5'8"
5'6" – 5'11"
5'10" – 6'3"
6'1" – 6'7"
🐐 Estimated
None yet.
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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.
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
Front-end less forgiving on steep descents
Higher starting price point
Claimed frame weight slightly heavier than some competitors
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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Dec 2023 · James Huang
The distillation of the perfect downcountry bike, as interpreted by boutique American builder Allied Cycle Works.
Truly incredible pedaling efficiency
Balanced handling
Excellent frame stiffness
Gorgeous lines
Heaps of options
Small-batch pedigree
Not as expensive as you think.
So-so small-bump compliance
Bottle clearance could be better
Only four sizes
Needlessly oversized cockpit.

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

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.”
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.

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.
USA-made
120mm or 100mm travel
Paint options
Descending prowess
| 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 Type: Dropper |
| 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 Type: Shimano XT Hydraulic Disc |
| Rims | Industry Nine 1/1 Trail S Wheelset |
|---|---|
| Tires | MAXXIS Rekon 29x2.40 WT EXO/TR Tan Wall |
First added July 20
Last updated February 11
Not listed for 1,203 days