IAx Advanced Ultegra Di2
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The Felt IAx Advanced Ultegra Di2 is a masterpiece of aerodynamic efficiency, specifically designed for serious triathletes and time trialists who want to maximize their performance. The foundation of this machine is the UHC Advanced carbon frame, which has been optimized in the wind tunnel to minimize air resistance and convert every pedal stroke into pure speed. This bike is not just an upgrade; it is a dedicated platform for athletes chasing the podium and aiming to break personal records, with the proven IAx geometry ensuring a stable and aggressive riding position.
This version is equipped with the highly reliable Shimano Ultegra Di2 2x12-speed electronic groupset, which provides lightning-fast and flawless shifting performance, even under heavy load. Confidence on descents and technical corners is guaranteed by the powerful TRP HD-T910 hydraulic disc brakes, which offer consistent stopping power in all weather conditions. The IAx rolls on a custom Reynolds AR58/62 DB carbon wheelset, which is tubeless-ready and offers a perfect balance between aerodynamic advantage and stability in crosswinds.
Every detail of the Felt IAx Advanced is focused on the needs of the triathlete. The Devox Bayonet 3.1 cockpit with carbon extensions offers extensive adjustment options for a perfect, personalized fit. For long distances, the bike features integrated storage solutions, including the IA CALpac 2.0 on the top tube for nutrition and the IA BTSpac behind the seatpost for tools. Combined with the comfortable ISM PS1.0 saddle, this is the ultimate machine to leave the competition behind.
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Key specifications
Key specifications
|
Brand |
Felt |
|---|---|
|
Frame material |
|
|
Model year |
|
Specifications
| Number of gears | 24 |
| Rear derailleur | Shimano Ultegra Di2 R8150 |
| Rear wheel | Reynolds AR58/62 DB Custom, Shimano |
| Groupset / Build | Shimano Ultegra DI2 |
| Tires | Continental Grand Prix SL, 700x25c |
| Basis kleur | Blue |
| Cassette | Shimano Ultegra R8100, 11-30T |
| Crankset | Shimano Ultegra R8100, 52/36T |
| Frame | Felt IAx 1.0 - IntegratedAero | UHC Advanced |
| Chain | Shimano Ultegra M8100 |
| Color | Turquoise |
| Size | 48cm, 51cm, 54cm, 56cm, 58cm |
| Frame material | Carbon |
| Model year | 2023 |
| Brakes | TRP HD-T910D, TRP TR-25, Center Lock, 140mm |
| Shifters | TRP HD-T910D, Shimano Dura-Ace Di2 SW-R9160 |
| Stem | Felt Dagger 31.8 | SuperLite aluminum |
| Front derailleur | Shimano Ultegra Di2 R8150 |
| Fork | Felt IAx 1.0 - IntegratedAero | UHC Advanced |
| Front wheel | Reynolds AR58/62 DB Custom, Shimano |
| Saddle | PS1.0 Satin Steel |
| SKU | BBLCA03000048 |
| Barcode | 1000000129786 |

Delivered to your home, safely and assembled
When you order a bicycle online from us, our mechanics in the workshop get straight to work to ensure your bicycle is shipped as quickly and safely as possible. For this, we use our own designed bicycle boxes, for optimal safety during transport.
Our team will contact you about the delivery time of your bicycle. Please allow for approximately 1 week.
Extensive bike fit possible
Every Woest bike includes a bike fit, so we and you know that you'll be comfortable for many kilometers to come.
After a thorough assessment of your body, the contact points of the bike are adjusted to perfectly match your body, using the most technically advanced bike fit technologies.
Our team will contact you regarding the delivery time of your bike and to schedule a bike fit with you. Please generally allow for 1 week.
Our Reviews
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Once again a good experience. Ordered a Sram Code RS brake set. Delivered quickly, unfortunately the handlebar clamps were forgotten but delivered without issues afterwards. Also the MMX.
JoostUpdated on Apr 14, 2026 -
Bought a cool Hollowgram R-SL50 wheelset for my gravel bike from Woest Sport at a great price. The rear wheel needed to be re-spoked according to the Cannondale AI principle, which they did very profes...
HansUpdated on 5 Oct 2025 -
Today, after some Googling, I went to Woest for new running shoes. I've been running in Asics Nimbus for over 20 years, and now, after a tip from a colleague, I decided to try Hoka. I was perfectly helped by the staff.....
HenkUpdated on 16 Mar 2023
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Pick up in storeImmediately available*
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Bike fittingHigh-end Retül bike fitting
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Running AnalysesAnalyses for optimal comfort
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Large showroomTotal concept for the multi-sport enthusiast
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