Felt Triathlon Race Bike | IA Advanced Ultegra Di2

Our Most Aero Bike. Ever.
Our first bike was made for one of the most remarkable triathletes in history—Paula Newby-Fraser—who rode her stealth black Felt B2 to multiple world championship victories. Since then, we've never stopped pursuing the ideal triathlon racing machine. The IA is the culmination of 30 years of iterative design and detailed development, and its results at the highest level of competition speak for themselves. So we can tell you that the IA is the most aerodynamic bike in the world. We can also say that it's the best-handling triathlon bike on the planet. But we should mention that the IA won the Kona World Championship a staggering six times in a row, and it holds both bike and overall course records across the lava fields of Hawaii. So, really, what else do you need to know?

IA | Advanced | Ultegra DI2
Our most popular triathlon frame has a Shimano electronic groupset, Reynolds carbon wheels, and hydraulic disc brakes. World championship-winning aero efficiency.

• Shimano Ultegra Di2 electronic drivetrain
• Hydraulic disc brakes
• Reynolds AR58 and AR62 carbon wheels

IA FEATURES

Aerodynamics
Every racecourse is different, with varying elevation gains, road curvature, and, of course, an endless variety of wind in terms of velocity and direction. After constant simulated modeling, wind tunnel testing, and real-world riding of prototypes, countless new designs were scrutinized, updated, and tested again, repeating anew. The result is a bike worthy of carrying on the legendary IA name, featuring the improved performance that disc brakes bring to the riding experience. It's not merely fast in a straight line—it's faster in all conditions.

Disc Brakes & Thru-Axles
Disc brakes are the best means of controlling a bicycle. Period. Plus, they perform better in adverse weather conditions. Wherever the road takes you and whatever you need to find yourself, the disc brake-equipped IA gives you the confidence to tackle any racecourse. The IA features thru-axles rather than traditional quick-release skewers to accommodate the added stopping forces provided by disc brakes. Its proven design provides a more secure interface between the bicycle frame and the wheel, enhancing the stiffness of the frame-and-wheel connection. We also offer a version of the IA with rim brakes for athletes who still prefer that classic feel.

Storage Solutions
The IA comes equipped with Felt's latest top tube storage solution, the integrated CALpac 2.0. This storage unit features ample space for all riding essentials, which a rider needs quick and easy access. Likewise, the IA includes the BTSpac storage device behind the seat tube. This unit is ideal for a flat tire repair kit, on-the-go tool kit, or any other items a rider doesn't require while pedaling on the bike. Its shape has been aerodynamically optimized for the IA, creating no penalty for aerodynamic drag.

Technical Specifications

• Version: IA | 4
• Series: IA DISC (1.0)
• Model: IA | Advanced | Ultegra Di2
• Finish: 1) White (Geo) 2) Purple (Geo) 3) Surfmist (Geo)
• Model Code: 1) FB-21A-IAX12-WH-FA 2) FB-21A-IAX12-PL-FA
• Model: # M3 1) BBJCA04 2) BBJCA10
• Sizes: 5 | 48, 51, 54, 56, 58cm
• Frame: Felt IntegratedAero Disc | UHC Advanced + TeXtreme carbon fiber
• Frame Technologies: MMC / InsideOut
• Bottom Bracket Type: Threaded | BSA 68mm
• Brake Type, Rear: Disc, Flat Mount | Ø140mm minimum
• Derailleur Hanger Type, Front: Brazed-On | integrated backup plate, non-replaceable, aluminum
• Derailleur Hanger Type, Rear: Standard Mount | TA 12x142 TRI/TT, horizontal, replaceable, aluminum
• Head-Tube Type: Felt Aero | 1.125" /
• Protector Type: Steerer stop integration for head tube protection / Felt ChainPlate for chain suck protection / Clear vinyl for chain slap protection
• Routing Type: Semi-Hidden | convertible for electronic or mechanical
• Seat Post / Clamp Type: Felt AeroTRI InternaLoc 1.0 | integrated with titanium bolts
• Wheel Type: 700c
• Tire Max (clearance): 28mm (4mm)
• Fork: Felt IntegratedAero Dagger Disc | UHC Advanced + TeXtreme carbon fiber
• Headset: IS (IS-2)
• Axle, Front: TA 12x100
• Axle, Rear: TA 12x142, horizontal
• Fork Technologies: Monocoque construction / Integrated crown race
• Brake Type, Front: Disc, Flat Mount | Ø140mm minimum FORK OFFSET 48, 51cm: 50mm / 54, 56, 58cm: 45mm
• Headset Specification
• Top Cap: stem integrated
• Top Cover: stem integrated
• Bearings: FSA integrated sealed cartridge, MR122
• Spacers: -
• Compression Device: Felt for carbon steerer tube
• Compression Ring: FSA H2145
• Crown Race: fork integrated
• Axle, Front Specification: Devox AxleTA 123.2 | 118mm + 5.2mm head, M12 x 1.5P x 13mm, Switch lever compatible
• Axle, Rear Specification: Devox AxleTA 172-9 L | 163mm + 9mm head, M12 x P1.0 x 19mm for Syntace X-12, with SL02 Switch hollow lever
• Speed: 2x11-speed
• Shifters: BaseBar: TRP HD-T910D, hydraulic with integrated Di2 shift buttons (right hand) / Extensions: Shimano Dura-Ace Di2 SW-R9160, TRI/TT
• Derailleur, Front: Shimano Ultegra R8050 Di2, braze-on
• Derailleur, Rear: Shimano Ultegra R8050 Di2, short cage
• Crank: Shimano Ultegra R8000, 52/36T
• Bottom Bracket: Shimano BBR60
• Cassette: Shimano Ultegra R8000, 11-28T
• Chain: Shimano Ultegra HG701
• Crank Length: 48, 51cm: 165mm / 54, 56cm: 170mm / 58cm: 172.5mm /
• Brake Levers: TRP HD-T910D, hydraulic with integrated Di2 shift buttons (right hand)
• Brake Calipers: TRP HD-T910, hydraulic disc, flat mount
• Brake Rotors: TRP TR-25, Center Lock, 140mm
• Wheels: Reynolds AR58/62 DB Custom, Shimano
• Tires: Continental Grand Sport Race, 700x25c
• Tire Compatibility: Tubeless Ready
• Rims: Carbon
• Handlebar: BaseBar: Devox Bayonet 3.1 | SuperLite aluminum / Extensions: Devox Ergomod | aluminum
• Stem: Felt Dagger 31.8 | SuperLite aluminum
• Grips / Tape: Felt EVA arm pads with anti-microbial cover and Felt Gel tape
• Handlebar Clamp Diameter: 31.8mm
• Handlebar Width: 48, 51cm: 39cm / 54, 56, 58cm: 42cm
• Stem Clamp Diameter: 31.8mm
• Stem Angle: -6°
• Stem Length: 110mm
• Stem Parts & Technologies: Integrated / Integrated top cap / Integrated headset top cover / Integrated fork cover mounting / Integrated cable routing
• Seatpost: Felt AeroTRI IL 1.0 VM | UHC Advanced carbon fiber
• Seatpost Offset: 0mm
• Seatpost Length: 300mm
• Seatpost Parts & Technologies: Integrated / Compliance Channels with aero covers / AeroTRI InternaLoc 1.0 Seatpost clamping system / Patented VariMount (VM) saddle rail clamping system
• Saddle: ISM PS1.0
• Extras: IA CALpac 2.0 Top Tube storage / IA BTSpac Seat Tube storage box / Shimano SM-BCR2 battery charger / Reynolds tubeless valve stems (2x75mm) / Compliance Channel aero seatpost covers / Carbon assembly paste
• Weight: 21.56 lb, 9.8 kg
• Weight Disclaimer: The most accurate way to determine a product's weight is to have your local dealer weigh it. Because we understand that weight is an important metric, we strive to list it when possible. When listed, weight is based on a single sample in a specific size and with all items as shown in the photo. It is not an exact indication of what your bike or frame will weigh, as there are tolerances in many variables involved (size, finish, hardware, components, and accessories). Felt continues to be an industry leader in weight and performance.
• Specification Disclaimer: Specifications are subject to change without notice.

Size Guide

Geometry

IA DISC (1.0)

IAx (1.0)