IAx Advanced Ultegra Di2
Felt
Triathlon
IAx Advanced Ultegra Di2 is a triathlon road bike (2024), from Felt, in the Iax series. It suits performance-focused riders who want an aggressive position, leaning toward an aggressive, race-leaning riding position, with a surface profile that is best matched to paved roads. Standout strengths from the metrics include a clearly aero-focused setup for faster road riding and balanced, versatile speed for everyday riding. That said, the main trade-off is a firmer ride feel than comfort-first options and more of a flat-to-rolling terrain bias than a climbing focus. Add this bike to compare on MatchBikes.com and see how it stacks up against similar triathlon models.
5.3
Rating

Image 1 of 1
Score Summary
Performance
5.3
Value
3.7
Fit
6.3
Performance
Built for speed and efficiency
Speed
7.4
High
Climbing Efficiency
1.8
Flatlander
Aerodynamics
10.0
Full Aero
Fit
Dialed-in Fit & Comfort
Riding Position
8.5
Race / Pro
Fit Flexibility
6.6
Moderately Adjustable
Ride Comfort
1.8
Race-Stiff
Value
Value for Money
3.7
Overpriced
Surface Range
Road OnlySpecifications
General
Brand
Felt
Model
IAx Advanced Ultegra Di2
Year
2024
Price
$7,875
Category
Road
Sub Category
Triathlon
Groupset
Ultegra, Ultegra Di2
Frame
Frame
Felt IAx 1.0, UHC Advanced
Suspension Fork
Felt IAx 1.0, UHC Advanced
Suspension Type
Rigid
Drivetrain
Shift Levers
TRP HD-T910D
Rear Derailleur
Shimano Ultegra Di2, RD-R8150, Shadow, 24-S
Front Derailleur
Shimano Ultegra Di2, FD-R8150
Cassette
Shimano CS-R8100, 11-30 T
Crank
Shimano Ultegra, FC-R8100, 52/36 T
Chain
Shimano CN-M8100
Wheels
Rims
Reynolds AR58/62 DB Custom, Tubeless ready
Tires
Continental Grand Prix SL, 700x25
Brakes
Brake Type
Hydraulic Disc
Brake Description
Front: TRP HD-T910, 2-piston, Hydraulic disc brake, Rear: TRP HD-T910, 2-piston, Hydraulic disc brake
Cockpit
Handlebar
Basebar: Devox Bayonet 3.1 | SuperLite aluminum / Extensions: Devox Ergomod | aluminum
Seat
Saddle
ISM PS1.0, Satin Steel
Seatpost
Felt Aero TRI IL 1.0 VM
Geometry
| Measurement | 48cm | 51cm | 54cm | 56cm | 58cm |
|---|---|---|---|---|---|
| Stack Reach Ratio | 1.251 mm | 1.263 mm | 1.287 mm | 1.292 mm | 1.286 mm |
| Bottom Bracket Height | 264 mm | 264 mm | 264 mm | 264 mm | 264 mm |
| Stack | 473 mm | 495 mm | 520 mm | 544 mm | 566 mm |
| Reach | 378 mm | 392 mm | 404 mm | 421 mm | 440 mm |
| Top Tube Length | 467 mm | 490 mm | 510 mm | 538 mm | 567 mm |
| Seat Tube Angle | 79.5 ° | 79 ° | 78.5 ° | 78 ° | 77.5 ° |
| Seat Tube Length | 489 mm | 512 mm | 538 mm | 563 mm | 586 mm |
| Head Tube Angle | 71.5 ° | 71.5 ° | 72 ° | 72 ° | 72 ° |
| Head Tube Length | 63 mm | 86 mm | 109 mm | 134 mm | 157 mm |
| Wheelbase | 958 mm | 980 mm | 990 mm | 1016 mm | 1042 mm |
| Bottom Bracket Drop | 72 mm | 72 mm | 72 mm | 72 mm | 72 mm |
| Wheels | 700 | 700 | 700 | 700 | 700 |
| Rider Min Height | 152 cm | 166 cm | 171 cm | 179 cm | 186 cm |
| Rider Max Height | 169 cm | 174 cm | 182 cm | 189 cm | 195 cm |




























































