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Felt Bicycles IA Advanced Ultegra Di2

Felt Bicycles IA Advanced Ultegra Di2
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The Felt IA2 might be the rolling definition of an "unfair advantage".

Above 30kph -about 18mph in old money- a rider spends about half their energy just pushing through the air. That's also assuming that the air is completely still. When a headwind comes into play, riding faster gets even harder. Why not let the bike help to reduce the workload? The Felt IA2 is designed to do exactly that. In fact, the IA2 is so good at cleaving the air like a hot cinder through jell-o, the Tour de France wouldn't allow it in a time trial! Triathlons, however, are not limited by such rulebooks. Felt knew they could let their design staff run wild, and this is some of their best work to help you go faster.

Engineering and developing aerodynamic speed machines takes technology and know-how, and Felt has plenty of both. Felt's own UHC Advanced carbon fiber is used throughout the frame and fully-carbon fiber fork, bringing an outstanding stength-to-weight ratio to every mile. Computational Fluid Dynamics software -or CFD- is used to perfect the frame and fork shape of the IA2 before a single plastic mock-up is sent to the wind tunnel. Once the shape has been refined, prototypes are sent to Felt's professional athletes and put through the meat grinder of the pro triathlon circuit. Triathletes riding Felt IA series of triathlon bicycles are undefeated at Kona as of 2019, allowing them to give valuable feedback to Felt's design team. Felt's UHC Advanced carbon fiber is a "recipe" of different raw forms of carbon fiber to bring feather-lightness, high torsional strength, and a smooth ride quality to the IA2.

The details make all the difference when seconds count, and the IA2 has them covered. Flat-mount disc brake calipers and internal cable routing offer a super-sleek profile to the wind, while a press-fit bottom bracket anchors the crankset for flex-free power delivery. Integrated top tube storage for gels or even a smartwatch makes yet another aspect of race day hassle-free. Deep fork blades and a blended fork crown help manage air turbulence effectively, making the deep-chord down tube work even better at high speeds.

Drivetrain duties are handled by Shimano's revolutionary Ultegra Di2 electronic component group. Instead of cables and housing, servo motors move the derailleurs with lightning-quickness. So quick, in fact, it even prolongs the lifespan of the chain. Shifter buttons are found at the end of the aero extensions and the end of the right brake lever. With more than one position to operate the drivetrain, the rider can shift while standing out of the saddle. Just try that with bar-end mechanical shifters! Shimano Ultegra front and rear derailleurs are powered by a rechargeable lithium-ion battery submerged inside the seat tube. Charging is done at the junction box at the IA2's head tube. Time between recharges is usually between 900-1000 miles. A Shimano Ultegra 52/36T alloy crankset and 11-28T Ultegra cassette adds a wide gearing range for challenging high-speed courses and fast bike splits.

Deep-section carbon fiber Reynolds AR58/62 wheels cleave the air better than shallow alloy hoops, and are lighter to boot. The front AR rim is 58mm deep, while the rear rim is a deeper 62mm. The deeper the rim cross-section, the lower the drag. 700x25c Continental Grand Sport Race tires keep rolling resistance low as well. Handling speed control duties is a set of TRP hydraulic disc brakes, featuring 140mm rotors that boasts excellent stopping power in all conditions, rain or shine. The IA2's ISM PS1.0 saddle is padded for comfort when the rider is in an aggressive position during extreme efforts. It sits atop a wing-shaped UHC Advanced carbon fiber seatpost/mast that reduces the crossing of turbulence from left to right, keeping the air managed more effectively. The base bar is installed on a direct-mount stem, adding torsional strength when pedaling out of the saddle. The aero extensions and forearm pads are also adjustable, ensuring a comfortable fit for short distance events to long-course IronMan races.

A Shimano charging cable is included with the purchase of this bicycle.


Frame Felt IntegratedAero Disc | UHC Advanced + TeXtreme carbon fiber
Fork Felt IntegratedAero Dagger Disc | UHC Advanced + TeXtreme carbon fiber
Headset IS (IS-2)
Axles 12mm thru-axle
Rims/Wheels Reynolds AR58/62 DB Custom, Shimano
Hubs Reynolds alloy with spline brake rotor installation
Spokes Bladed straight-pull stainless steel
Tires Continental Grand Sport Race, 700x25c
Crankset Shimano Ultegra R8000
Chainrings 52/36T
Bottom Bracket Shimano BBR60
Chain Shimano Ultegra HG701
Front Derailleur Shimano Ultegra R8050 Di2, braze-on
Rear Derailleur Shimano Ultegra R8050 Di2, short cage
Cassette/Rear Cogs Shimano Ultegra R8000, 11-28T
Shifters BaseBar: TRP HD-T910D, hydraulic with integrated Di2 shift buttons (right hand) / Extensions: Shimano Dura-Ace Di2 SW-R9160, TRI/TT
Handlebars BaseBar: Devox Bayonet 3.1 | SuperLite aluminum / Extensions: Devox Ergomod | aluminum
Tape/Grips Felt EVA arm pads with anti-microbial cover and Felt Gel tape
Stem Felt Dagger 31.8 | SuperLite aluminum
Brake Levers TRP HD-T910D, hydraulic with integrated Di2 shift buttons (right hand)
Brakes TRP HD-T910, hydraulic disc, flat mount, w/TRP TR-25, Center Lock, 140mm rotors
Pedals Sold separately
Saddle ISM PS1.0
Seat Post Felt AeroTRI IL 1.0 VM | UHC Advanced carbon fiber
Accessories & 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

* Subject to change without notice.