The ALFA DISC built with the new 12 speed Ultegra R8100 gives you the flawless precision and streamlined ergonomics of Shimano’s Di2 electronic shifting. But by forgoing some of the extremes you get with Dura Ace -- that is, the ultra-light hardware, the super-low-friction moving parts and the luxe finishwork. We dial up the value further by matching it to the Industry Nine AR25 wheelset, featuring their beautiful, lightweight and fast rolling US made Torch hubs.
There is something gloriously pure about the single-minded road machine. The ALFA DISC is exactly that: Our knock-down, drag-out race bike whose goal is to take each and every one of your watts and transform it into sheer speed. The carbon layup and frame geometry are tuned with care to give you just the right amount of road feel for blasting through twisty roads. The final addition to its performance is actually subtraction -- the way we take the edge off the high-frequency chatter from choppy pavement.
The ALFA DISC pairs the very best in technology and performance to timeless design. We leverage the very best in raw materials and engineering know-how to deliver a best-in-class race bike, doing so in an elegant and pragmatic way.
Elegance? The near-level top tube of the ALFA DISC hearkens to decades of classic road bike aesthetics. We obsess on the little things like cable management and the seatpost binder. Pragmatism? We dismiss 15 years of senseless blather about new-and-improved bottom brackets and build the ALFA DISC with a 68mm threaded design. We offer the bike in 12 sizes -- including “+” sized headtubes. We use Innegra fibers at high-stress areas for added durability where you need it most.
Key Features
- MAXIMUM CLEARANCE
- 700x30 front and rear
- WEIGHT
- 875g for 56cm
- SIZING
- 6 standard sizes from 49cm-61cm, and 6 "Plus" sizes (2cm taller headtube)
- DRIVETRAIN
- 2x crankset for maximum gearing options. Threaded BB. Braze-on front derailleur. Compatible with all shifting systems - electronic and mechanical.
- OTHER SPECS
- 27.2mm seatpost. Flat-mount disc brakes. Integrated headset - 1-1/8" to 1-1/4"
Build Kit
- BOTTOM BRACKET
- Shimano Ultegra SM-BBR60
- BRAKES
- Shimano Ultegra BR-R9170
- CASSETTE
- Shimano Ultegra CS-R8100 11-30
- CHAIN
- Shimano XT CN-M8100
- CRANKSET
- Shimano Ultegra FC-R8100 50/34
- FRONT DERAILLEUR
- Shimano Ultegra FD-R8150 Di2
- HANDLEBAR
- FSA K-Force Compact Carbon
- HANDLEBAR TAPE
- Arundel Gecko
- REAR DERAILLEUR
- Shimano Ultegra RD-R8150 Di2
- SADDLE
- Ergon SR10 S/M Tinox Saddle
- SEATPOST
- FSA SL-K Carbon Seatpost
- SHIFT LEVERS
- Shimano Ultegra ST-R8170 Di2
- STEM
- FSA Energy
- TIRES
- Vittoria Rubino Pro TLR 700x28
- WHEELSET
- Industry Nine AR25
Sizing Guide
49 | 52 | 54 | 56 | 58 | 61 | |
Crankset | 170 | 170 | 172.5 | 172.5 | 175 | 175 |
Handlebar | 40 | 40 | 42 | 42 | 44 | 44 |
Stem | 90 | 90 | 100 | 100 | 110 | 110 |
Frame Geometry

Frame Size | 49 | 52 | 54 | 56 | 58 | 61 |
A. Headtube Angle | 72.25 | 73 | 73 | 73.5 | 73.5 | 74 |
B. Seat Tube Angle | 75.5 | 74 | 73.5 | 73.25 | 73 | 72.5 |
C. Head Tube Length | 97 | 117 | 137 | 157 | 187 | 207 |
D. Effective Top Tube Length | 513 | 537 | 548 | 565 | 583 | 601 |
E. Seat Tube Length (c-t) | 482 | 512 | 532 | 552 | 572 | 602 |
F. Chainstay Length | 410 | 410 | 410 | 410 | 410 | 410 |
G. Stack | 501 | 523 | 539 | 560 | 588 | 608 |
H. Reach | 382 | 386 | 389 | 396 | 404 | 410 |
I. Bottom Bracket Drop | 71.5 | 71.5 | 69 | 69 | 67.5 | 67.5 |
J. Wheelbase | 969 | 974 | 981 | 992 | 1008 | 1015 |
K. Standover Height (w/700x28) | 750 | 775 | 791 | 815 | 839 | 862 |
L. Fork Rake | 44 | 44 | 44 | 44 | 44 | 44 |
49+ | 52+ | 54+ | 56+ | 58+ | 61+ | |
A. Headtube Angle | 72.25 | 73 | 73 | 73.5 | 73.5 | 74 |
B. Seat Tube Angle | 75.5 | 74 | 73.5 | 73.25 | 73 | 72.5 |
C. Head Tube Length | 117 | 137 | 157 | 177 | 207 | 227 |
D. Effective Top Tube Length | 513 | 537 | 548 | 565 | 583 | 601 |
E. Seat Tube Length (c-t) | 482 | 512 | 532 | 552 | 572 | 602 |
F. Chainstay Length | 410 | 410 | 410 | 410 | 410 | 410 |
G. Stack | 520 | 542 | 559 | 580 | 607 | 628 |
H. Reach | 376 | 381 | 382 | 391 | 398 | 404 |
I. Bottom Bracket Drop | 71.5 | 71.5 | 69 | 69 | 67.5 | 67.5 |
J. Wheelbase | 969 | 974 | 981 | 992 | 1008 | 1015 |
K. Standover Height (w/700x28) | 750 | 775 | 791 | 815 | 839 | 862 |
L. Fork Rake | 44 | 44 | 44 | 44 | 44 | 44 |