Argon 18 E-117 105 Bike

$4,399⁰⁰

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Argon 18 | SKU: 117D.XS.374B.3.1 | Option: Flaming Red, XS

This product is HSA / FSA eligible

Recogida disponible en RA Cycles - Brooklyn

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Argon 18 E-117 105 Bike Info

The Argon 18 E-117 105 Bike is the entry configuration of Argon 18's redesigned E-117 triathlon platform — a complete, race-ready tri bike built around a carbon frame with a 78-degree seat tube angle, the brand's 3D System fit technology, and a full Shimano 105 R7100 12-speed drivetrain. At $4,399, it's the most accessible way into the E-117 frame and cockpit design, sitting at the base of a lineup that extends through Shimano Ultegra Di2 and SRAM Force AXS configurations at significantly higher prices. The bike arrives fully assembled with aerobars, wheels, brakes, and saddle spec'd out. Pedals are the only thing left to add.

The E-117's carbon frame is built around a triathlon-specific geometry that holds a 78-degree seat tube angle across all five sizes — XS through XL. That steep angle rotates the rider's hips forward relative to a road bike position, reducing the hip angle at the top of the pedal stroke. In triathlon, that matters specifically for the run: a more open hip angle on the bike preserves range of motion in the hip flexors, which translates to a more natural running stride off T2. Chainstays hold at 413mm across all sizes, and the head tube holds at 72 degrees, producing consistent front-end geometry from the smallest to the largest frame. The bike is designed to put riders in an aggressive aero position and keep them there comfortably for the duration of the bike leg.

The fit system that distinguishes the E-117 frame is Argon 18's 3D System. On most tri bikes, handlebar height is adjusted by stacking spacers below the stem — a method that introduces compliance into the steerer and can allow the front end to flex slightly under hard efforts. The 3D System raises the top bearing instead of adding spacers, integrating the head tube extension as a structural component rather than a stack of separate parts. Each frame size supports up to three extension heights, allowing the stack height to be adjusted without any loss of headtube stiffness. Custom 3D caps seal the headset at each extension height, keeping the cockpit profile clean. The geometry chart reflects this: each size shows a stack range rather than a fixed number — the XS spans 583mm to 612mm, the XL from 661mm to 690mm — representing the adjustment window the 3D System provides within a single frame.

Shifting is handled by the Shimano 105 R7100 groupset — the 12-speed generation of Shimano's mid-range offering, running a 52/36 chainring setup. Crank arm length is size-specific: 165mm for XS and S, 170mm for M and L, and 172.5mm for XL. The cassette is an 11-34 12-speed, wider than a typical road race setup and appropriate for triathlon courses with climbing or for athletes who want flexibility across different race venues. Shifting on the aerobars is handled by Microshift TT/Tri bar end shifters, compatible with the Shimano drivetrain. Braking uses Argon 18's Integrated Brake System with TRP TR140-25 140mm rotors — hydraulic calipers routed through the integrated tri cockpit.

The cockpit is built around an Argon 18 carbon basebar paired with a Profile Design 1/Seventeen -17-degree stem and Profile Design Sonic/Ergo/39a aerobars at 400mm with 10mm pads. Wheels are DT Swiss E1800 Spline aluminum front and rear — a durable wheelset suited to training volume and race use at this price tier. The Prologo Dimension-Tri 143 saddle is designed for the forward tri position rather than a standard road saddle. Tires are Vittoria Rubino Pro IV TLR 700×28 with tubeless-ready construction. Two colorways are available: Flaming Red and Black Stealth.

Argon 18 E-117 105 Bike - Specifications

Frame Material:

Carbon

Fork:

Carbon

Headset:

Integrated

Seatpost:

E-117

Front Derailleur:

Shimano 105 R7100

Rear Derailleur:

Shimano 105 R7100

Crankset:

Shimano 105 R7100

Chainrings:

52/36

Bottom Bracket:

Shimano BB-RS500-PB

Brake Calipers:

Argon 18 Integrated Brake System

Brake Levers:

Argon 18 Integrated Brake System

Rotors:

TRP TR140-25 140mm

Bar End Shifters:

Microshift TT/Tri bar end shifters

Cassette:

Shimano 105 R7100 12-speed 11-34

Chain:

Shimano M7100 12-speed

Wheel - Front:

DT Swiss E1800 Spline

Wheel - Rear:

DT Swiss E1800 Spline

Stem:

Profile Design 1/Seventeen Stem -17°

Aerobars:

Profile Design Sonic/Ergo/39a (400mm) Aerobar + 10mm pad

Aero Basebar:

Argon 18 carbon basebar

Saddle:

Prologo Dimension-Tri 143

Tires:

Vittoria Rubino Pro IV TLR 700x28

Bar Tape:

Ciclovation Leather Touch Tornado Gloss (custom)

Pedals:

Not Included

*Specifications are subject to change.

Argon 18 E-117 105 Bike Geometry

Argon 18 E-117 105 Bike Triathlon Bike Geometry

Size:

B. Seat Tube (c-t)

455

500

516

542

568

C. Top Tube Length

492

504

517

527

545

D. Head Tube Length

49-84

60-95

77-112

104-139

131-166

E. Chain Stay Length

413

F. BB Drop

G. Seat Tube Angle

H. Head Tube Angle

I. Stand Over Height

729

767

782

808

833

J. Wheel Size

700c

K. Stack

583-612

594-622

609-638

636-664

661-690

L. Reach

401-486

421-506

441-525

456-540

478-563

Stem Length

70mm

80mm

90mm

100mm

110mm

Bar Width

40cm

M. Crank Length

165mm

170mm

172.5mm

The RA Perspective

The E-117 105 is built for a specific buyer: the triathlete who's done a few races on a road bike with clip-on aerobars and is ready to step into a proper purpose-built machine without paying for electronic shifting. At $4,399, you're getting the E-117 frame — the same geometry and 3D System as the $7,999 Ultegra Di2 version — with a mechanical drivetrain and alloy wheels in place of electronic shifting and a carbon wheelset.

The 78-degree seat tube is the feature that matters most and gets underexplained at the point of sale. This is what separates a real triathlon bike from a road bike in tri clothes. That steep angle rotates the hips forward, opens the hip flexors, and preserves the running stride coming off the bike. Athletes who race on road bikes regularly arrive at T2 with tight hips. The E-117 geometry is specifically designed to delay that limitation.

The 3D System is worth understanding before you buy. Instead of stacking spacers under the stem to adjust bar height — which adds compliance to the front end — the E-117 integrates the head tube extension structurally, with up to three heights per frame size and no loss of stiffness. If your fit needs 20mm more stack than a traditional build would offer, the 3D System accommodates that without you having to size up the frame.

The tradeoffs are predictable. Bar end shifting is reliable but requires deliberate, sequential technique compared to electronic shifting. The DT Swiss E1800 wheels are solid alloy training wheels — adequate for race day at this price, but the first upgrade most athletes will target as they get more serious. For a rider stepping into purpose-built triathlon geometry for the first time, the E-117 105 is a credible place to start.

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