Felt NEXAR Expert Ultegra Di2 Bike
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Felt NEXAR Expert Ultegra Di2 Bike
Felt NEXAR Expert Ultegra Di2 Bike Info
Felt's aero legacy stretches back eighteen years to the AR — a platform that helped shape what a purpose-built aero road bike could be. The Felt NEXAR Expert Ultegra Di2 Bike is the next chapter in that lineage, and it arrives with a different set of priorities than most bikes in this category. Where a typical aero road bike chases drag reduction above all else, NEXAR is built around three simultaneous goals: aero, weight, and fit — not maximized in one direction at the expense of the others, but deliberately balanced across all three. Felt calls it the fastest bike they've ever built, and the geometry philosophy behind it is what makes that speed accessible for real riders on real roads.
The aero credentials are backed by data. Felt's engineering work shows a 5% drag reduction over the previous AR frame, and at 40km/h the NEXAR sits within 4 watts of the fastest full-aero bikes on the market. The UD carbon frame and fork — Felt's benchmark NEXAR layup — carry the aerodynamic shaping that produces those numbers. But the more interesting story is what happens at the contact points. NEXAR's geometry features a higher stack and shorter reach than a conventional aero bike, giving more riders the ability to maintain an aero position over the course of a long ride rather than abandoning it after the first hour. The seat tube is steeper across all seven sizes, placing your power directly over the bottom bracket. Felt was also able to eliminate the offset seatpost entirely, which simplifies setup and keeps the rear end clean. Seven frame sizes run from 45 to 61cm, and crank lengths are spec'd appropriately — 165mm for smaller sizes, 170mm for larger — so the biomechanics work at every position in the range.
The Expert builds on that platform with Shimano Ultegra Di2 R8150 — a pairing that makes strong sense here. The 12-speed electronic system moves through an 11-30 cassette with the clean, consistent action that Di2 delivers regardless of fatigue or riding conditions. R8170 hydraulic disc brakes provide reliable modulation front and rear, with 140mm Shimano MT900 rotors handling heat and stopping power. The Felt Road One-Piece Integrated Cockpit keeps the front end sealed aerodynamically and comes in under 300 grams — a strong figure for a full bar and stem unit. The Vision SC45 i23 wheelset brings 45mm of aero depth with an internal rim width that matches well to the Continental GP 5000 S TR tires running tubeless-ready in 700x28. That's a fast-rolling, capable combination whether you're in a training group or working toward a finish line. A Prologo NAGO R4 PAS T2.0 137mm saddle rounds out the build.
Specs at a Glance
- Frame: UD Carbon
- Fork: UD Carbon
- Seatpost: Felt NEXAR Carbon
- Cockpit: Felt Road One-Piece Integrated, ≤300g
- Drivetrain: Shimano Ultegra Di2 R8150, 12-speed
- Crankset: Shimano Ultegra R8100, 52/36
- Cassette: Shimano Ultegra R8100 11-30
- Brakes: Shimano Ultegra R8170 Hydraulic Disc, 140mm Shimano MT900 rotors
- Wheels: Vision SC45 i23
- Tires: Continental GP 5000 S TR 700x28 (tubeless-ready)
- Saddle: Prologo NAGO R4 PAS T2.0 137mm
- Available Sizes: 45, 48, 51, 54, 56, 58, 61cm
- Color: Glossy Grey
Design Benefits
- Balanced aero performance — a 5% drag reduction over the previous AR and within 4 watts of the fastest full-aero bikes at 40km/h, achieved without locking you into an unsustainable riding position.
- Geometry designed for real-world speed — higher stack, shorter reach, steeper seat tube angle, and size-appropriate crank lengths from 165mm to 170mm mean more riders can hold an aero position for the full duration of a hard effort.
- Shimano Ultegra Di2 R8150 electronics — 12-speed electronic shifting and R8170 hydraulic disc braking deliver consistent, precise performance in all conditions.
- Integrated cockpit at ≤300 grams — the Felt Road One-Piece bar and stem seals the front end aerodynamically while contributing meaningfully to the overall weight of the bike.
- Vision SC45 i23 wheels with Continental GP 5000 S TR tires — 45mm aero depth with a wide internal rim channel and tubeless-ready 700x28 tires: fast enough for race day, comfortable enough for the training miles that get you there.
Final Take
The NEXAR Expert puts Felt's UD carbon aero platform within reach without requiring the flagship FRD spec. The Ultegra Di2 build is well-suited to the frame's capabilities, the Vision SC45 wheels and GP 5000 tires are a proven combination, and the geometry philosophy — higher stack, shorter reach, steeper seat angle — makes this a bike you can actually ride fast for the long haul. If you're looking for a full aero road bike that performs in real conditions and fits a wide range of riders, the NEXAR Expert is worth a serious look at $6,999.
Felt NEXAR Expert Ultegra Di2 Bike - Specifications
*Specifications are subject to change.
Felt NEXAR Expert Ultegra Di2 Bike Geometry
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Shipping bikes can be tricky. They are big and bulky but delicate. Shipping your passion / investment is nothing we take lightly. We go through great detail to ensure your new ride will get to you in perfect condition.
So you've purchased the bike of your dreams! We've put together this video to outline the R&A concept of shipping bikes and the steps we take to get you your new bike in perfect condition. It will show you the careful steps we take to assemble your bike to make it as easy as possible for you to get your bike on the road when you receive it. Ready to ride. It will also show you the tips and tricks of removing all of your parts in the most careful way to ensure your riding as quickly as possible.
