Polygon Helios A8 Ultegra Di2 Road Bike 2026

IN THE RELENTLESS PURSUIT OF SPEED

Designed to cut through air better. Introducing the all-new Helios A8 Di2 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 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 road bike 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

UCI-approved ACX Performance carbon frameset designed for maximum rigidity, efficiency, and aero performance

Shimano Ultegra Di2 12-speed groupset providing ultra-fast, smooth electronic shifting

52/36T crankset paired with an 11–34T cassette for a wide gear range suited to climbs and sprints

LINC Beta 45 mm carbon wheelset with tubeless-ready rims for improved aerodynamics and speed efficiency

Integrated LINC carbon handlebar and aero carbon seatpost for a clean, aerodynamic cockpit

Pirelli PZero Road TLR 700x28C tyres delivering premium grip, speed, and rolling efficiency

Premium finishing kit with LINC Flux2 saddle, sealed bearing headset, and high-precision thru-axle hubs

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, 52/36T

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

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

Bottom Bracket: TOKEN T47 85.5 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, width:
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, extension:
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 278 mm (NDS) / 280 mm (DS)
Rear: Stainless double-butted 272 mm (NDS) / 274 mm (DS)

Brake Lever: Shimano Ultegra ST-R8170

Brake Caliper: Shimano Ultegra hydraulic disc

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