Felt IA Advanced 105


  • Shimano 105 mechanical groupset
  • Hydraulic disc brakes
  • Devox Wheels RDS.A1 with Shimano hubs
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Felt’s Most Aero Bike. Ever.

Our very first bike was made for one of the greatest 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 painstaking 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 what we should really mention is 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 105

The most aerodynamically efficient carbon frame with Shimano’s no-nonsense 105 group.

Every racecourse is different, with varying elevation gains, road curvature, and, of course, an endless variety of wind, both in terms of velocity and direction. After endless simulated modeling, wind tunnel testing, and real-world riding of prototypes, countless new designs were scrutinized, updated, and tested again, the cycle repeating anew. The result is a bike worthy of carrying on the legendary IA name, one also 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 are the best means of controlling a bicycle. Period. Plus, they perform better in adverse weather conditions. Wherever the road takes you, and in whatever conditions you find yourself, the disc brake-equipped IA gives you the confidence to tackle any racecourse. To accommodate the added stopping forces provided by disc brakes, the IA features thru-axles rather than traditional quick-release skewers. It’s a proven design that provides a more secure interface between the bicycle frame and the wheel, which also enhances 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.

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 of the riding essentials to which a rider needs quick and easy access. Likewise, the IA includes the BTSpac storage device, located behind the seat tube. This unit is ideal for a flat tire repair kit and/or on-the-go tool kit, or any other items that a rider doesn’t require while pedaling on the bike. It’s shape has been aerodynamically optimized for the IA, meaning that it creates no penalty in terms of aerodynamic drag.




Felt IntegratedAero Disc 1.0, UHC Advanced + TeXtreme carbon fiber
MMC / InsideOut / Felt CALpac 2.0 top tube storage with Felt AEROpac 2.0 top tube storage cover
Routing: Semi-Hidden, convertible for electronic or mechanical


Felt IntegratedAero Disc 1.0 – Dagger, UHC Advanced + TeXtreme carbon fiber
Monocoque construction / Integrated crown race / Felt Dagger carbon fiber cover for Junction or BlipBox storage and hidden brake hose routing

Fork Offset: 48, 51cm: 50mm / 54, 56, 58cm: 45mm

Bottom Bracket

Shimano RS500 Threaded, BSA 68mm


Front: Disc, Flat Mount, Ø140mm minimum rotor
Rear: Disc, Flat Mount, 25mm thickness, Ø140mm minimum rotor
Levers: TRP HD-T910, hydraulic
Calipers: TRP HD-T910, hydraulic disc, flat mount
Rotors: TRP TR-25, Center Lock, 140mm


Front: Shimano 105 R7000, braze-on, integrated backup plate, non-replaceable, aluminum
Rear: Shimano 105 R7000, short cageStandard Mount, TA 12×142 TRI/TT, horizontal, replaceable, aluminum

Head Tube

Felt Aero, 1.125"


Steerer stop integration for head tube protection / Felt ChainPlate for chain suck protection / Clear vinyl for chain slap protection

Seat Post / Clamp

Felt Aero TRI InternaLoc 1.0, integrated with titanium bolts
Felt Aero TRI IL 1.0 VM, UHC Advanced carbon fiber
Offset: 0mm
Length: 300mm

Integrated / Compliance Channels with aero covers / Aero TRI InternaLoc 1.0 seatpost clamping system / Patented VariMount (VM) saddle rail clamping system


Max (Clearance): 28mm (4mm)
Continental Grand Sport Race, 700x25c
Tubeless Compatible


IS (IS-2)
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


Front: TA 12×100, Devox AxleTA 123.2, 118mm + 5.2mm head, M12 x 1.5P x 13mm, Switch lever compatible
Rear: TA 12×142, horizontal, Devox AxleTA 172-9, 163mm + 9mm head, M12 x P1.0 x 19mm for Syntace X-12, Switch lever compatible


Shimano 105 2×11-speed


microSHIFT A11, TRI/TT


Shimano 105 R7000, 52/36T


Shimano 105 R7000, 11-28T


Shimano 105 HG601
48, 51cm: 165mm / 54, 56cm: 170mm / 58cm: 172.5mm /


Devox WheelRDS.A1 with Shimano hubs, 30/19
Rims: Aluminum 30mm
Spokes: J-Bend, 2.0, stainless steel, black
Nipples: Brass, black


Front: Shimano RS470, J-Bend, Center Lock, 28h, TA 12×100
Rear: Shimano RS470, J-Bend, Center Lock, 28h, TA 12×142, 11-speed


Basebar: Devox Bayonet 3.1, SuperLite aluminum / Extensions: Devox Ergomod, aluminum
Grips / Tape: Felt EVA arm pads with anti-microbial cover and Felt Gel tape
Width: 48, 51cm: 39cm / 54, 56, 58cm: 42cm


Felt Dagger 31.8 Integrated, SuperLite aluminum
Stem Angle: -6°
Length: 110mm

Integrated / Integrated top cap / Integrated headset top cover / Integrated fork cover mounting / Integrated cable routing

Handlebar Clamp





Felt BTSpac seat tube storage box / Compliance Channel aero seatpost covers / Carbon assembly paste


22.92 lb, 10.42 kg

The most accurate way to determine a product's weight is to have your local dealer weigh it for you. 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.

Specifications subject to change without notice.


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