Polygon Helios A8 Ultegra Di2 PM Road Bike 2026

IN THE RELENTLESS PURSUIT OF SPEED

Designed to cut through air better. Introducing the all-new Helios A8 Di2 powermeter road bike—the pinnacle of aerodynamic engineering and racing performance. Developed over three years of relentless testing and perfected with the elite UCI Continental Team, TSG, the Helios A8 Di2 powermeter road bike is built to dominate any race condition.Refined to be 5.2 seconds faster than its predecessor and lighter than ever, the Helios A8 Di2 powermeter is meticulously optimized for speed, agility, and control. Whether battling headwinds or slicing through tight corners, its cutting-edge aerodynamics and balanced stiffness deliver an unmatched ride.This isn’t just a road bicycle—it’s your competitive edge.

FEATURES

Its light

Weight is a key factor in proving a high-end road bike’s quality. Our engineers tackled the challenge of trimming grams without sacrificing stiffness—redesigning the ACX carbon frame to shed nearly 150 grams while maintaining top performance.

Superior Power Transfer

We’ve reinforced the bottom bracket for instant power transfer and adopted a T47 threaded system for added stiffness, smooth pedaling, and zero creaks—while up front, a shortened, reinforced head tube sharpens cornering for a decisive edge in every sprint.

From racing admiration to engineering the ultimate aerodynamic machine

The downtube, as the bike’s aerodynamic core, now features dual bottle cage mounting positions—low for large bottles, high for smaller ones—to reduce drag across setups. Paired with a newly redesigned, sleeker fork, the Helios A now cuts through air more efficiently than ever.

This is performance, perfected

With the new Helios A, Polygon redefines adaptability in road biking. The frame supports both an aero seat post (included) and a 27.2mm round option for added comfort—giving riders full control, whether tackling fast sprints or rough courses. It also fits tires from 28c to 34c, making it ultra-versatile for varying road conditions, and comes equipped with a 45mm carbon rim for balanced performance across the series.

It's Innovative

The complete series features a new semi-integrated carbon cockpit—handlebar, stem, and wheels—designed by us and proudly branded under our new component line, LINC. Built to balance performance and comfort, LINC wheels make the bike lighter, faster, and more stable in crosswinds, while maximizing speed on flats. Ideal for modern cyclists who value both performance and elegance.

SPECIFICATIONS

Frame Material: ACX Performance carbon, UCI approved

Fork: ACX Performance carbon, UCI approved

Frame Color: Midnight Pine / Chrome Rocket

Decal Color: Holographic Silver

Shifter: Shimano Ultegra Di2 ST-R8170, 2×12-speed

Crankset: Shimano Ultegra FC-R8100-P, 52/36T power meter

Cassette: Shimano Ultegra CS-R8101-12, 11–34T

Rear Derailleur: Shimano Ultegra Di2 RD-R8150, direct attach

Bottom Bracket: TOKEN T47, 85.5 mm, for 24 mm spindle

Chain: KMC X12 EPT, 12-speed

Saddle: LINC Flux2, CR-MO Ø7 mm

Seatpost: Carbon aero, AERO 35 × 351 mm

Handlebar: LINC carbon
400 mm (XXXS, XXS, XS) / 420 mm (S, M) / 440 mm (L, XL)
Bar bore: 31.8 mm
Rise/Drop: −134.2 mm (XXXS–XS) / −138.2 mm (S–XL)
Bend/Reach: 92.5 mm (XXXS–XS) / 89.7 mm (S–XL)

Stem: Carbon
90 mm (XXXS) / 100 mm (XXS, XS) / 110 mm (S, M) / 120 mm (L, XL)
Bar bore: 31.8 mm
Rise/Drop: −7.5°

Headset: Integrated (IS) sealed bearing, IS 52/28.6 | IS 52/40

Wheelset: LINC Beta Carbon Disc (45 mm), tubeless-ready

Wheel Size: 700C

Tyres: Pirelli PZero Road TLR 700×28C

Rims:
Front: Carbon 622-22, 20H, disc tubeless-ready
Rear: Carbon 622-22, 24H, disc tubeless-ready

Hubs:
Front: Alloy, 12×100 mm, 20H, sealed bearings, Center Lock
Rear: Alloy, 12×142 mm, 24H, sealed bearings, Center Lock

Spokes:
Front: Stainless double-butted, NDS 278 mm / DS 280 mm
Rear: Stainless double-butted, NDS 272 mm / DS 274 mm

Brake Lever: Shimano Ultegra ST-R8170

Brake Caliper: Shimano Ultegra hydraulic disc

Rotor: Shimano Ultegra CL800
Front: 160 mm / Rear: 140 mm, Center Lock