Alfa
BC40
Echo
Able
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
- SRAM Dub 73 BSA
- BRAKES
- SRAM G2 RS 180 Front / 160 Rear
- CASSETTE
- SRAM XG 1275 Eagle 10-52
- CHAIN
- SRAM GX Eagle
- CRANKSET
- SRAM GX Eagle Dub
- FRONT DERAILLEUR
- N/A
- HANDLEBAR
- FSA SL-K MTB Carbon
- HANDLEBAR TAPE
- ESI Chunky
- REAR DERAILLEUR
- SRAM GX Eagle AXS
- SADDLE
- Selle Italia Novus Boost Superflow
- SEATPOST
- Fox Transfer Performance 31.6
- SHIFT LEVERS
- SRAM GX AXS Controller
- STEM
- FSA Gradient
- TIRES
- MAXXIS Rekon 29x2.40 WT EXO/TR Tan Wall
- WHEELSET
- Industry Nine 1/1 Trails S
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 |
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