Allied Bikes · Mountain
Allied BC40 Mountain Bike
A singletrack-slaying all-day sled
It is a thoroughly modern XC racing mountain bike with the capabilities of an all-day trail machine
Allied has a big backyard, with endless singletrack to fuel the direction of the BC40’s development and miles of dreamy trails to dial the bike’s fit, feel, and responsiveness in search of the ultimate off-road ride.
Specifications
- Frame
- Carbon, 1950g (size L), made in Allied's Bentonville factory
- Travel
- 120mm
- Laminate
- Optimized carbon schedule, 100g lighter and stiffer than the previous BC40
- Bottom Bracket
- Co-molded aluminum bottom bracket and main pivot hardware, easier cable access
- Drivetrain
- Bolt-on chainguide, max 34-tooth chainring
- Cockpit
- Allied DUET two-piece bar and stem, 780mm + 50mm, 199g combined
- Builds
- SRAM GX, X0 or XX SL Eagle Transmission, from $6,975 complete
- Frameset
- $4,000
- Custom Paint
- Full custom program, complete color wheel
About the Allied BC40
Named after the legendary Back 40 trail system that chases the undulations across the east side of Arkansas's Bella Vista, the BC40 is designed and built fittingly in Allied's Bentonville factory. It is a thoroughly modern XC racing mountain bike with the capabilities of an all-day trail machine: 120mm of suspension on a top-of-the-line pedaling platform, backed by progressive geometry that delivers pin-sharp handling and unwavering stability at speed.
The current BC40 is the quiet kind of update we like best. An optimized carbon laminate takes 100 grams out of the frame and adds stiffness rather than trading it away, so the power you put down goes into the ground on the climbs. Co-molded aluminum hardware at the bottom bracket and main pivot eases maintenance and opens up cable access, a bolt-on chainguide adds the last few percent of chain security that racing on rough ground asks for, and the DUET two-piece cockpit gives you one-piece weight — 199 grams for bar and stem together — without giving up adjustability.
People make bikes, not machines
The Finer Things
Made Here
Allied is justifiably proud of its US-everything manufacturing approach, and the BC40 is a happy recipient of the brand's 'MADE HERE' mantra. In its brand statement, Allied makes a pleasing distinction between mechanized manufacturing and the skills, knowledge and intelligence that can only come from human heads, hearts and hands, arguing that people make bikes, not machines. Hear hear.
Two Pieces, No Penalty
Integrated one-piece cockpits buy their weight savings with your fit options. Allied's DUET system refuses the trade: a 780mm bar and 50mm stem that together weigh 199 grams — territory most one-piece systems cannot reach — while keeping the adjustability of a traditional two-piece setup. Roll, height, width: all still yours to tune, which on a bike you will race and ride all day is exactly as it should be.
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About the brand
Allied Bikes
From the consummate speed and poise of the asphalt-going Alfa to the fast-paced, all-road Echo and wide-tire, gravel-slaying Able, Allied bikes deliver on every level. And they're made in the US. And that bears repeating.
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