Up for sale is a stunning, race-ready Polygon Helios A8X carbon aero road bike. This machine is built for pure speed, combining a UCI-approved, ultra-lightweight aerodynamic carbon frame with flawless electronic shifting.

This bike has been significantly upgraded with premium, performance-focused components that address both speed and long-term durability:

1. Elitewheels Drive 65D II Carbon Wheelset: Featuring a deep 65mm aero profile, ultra-responsive 4.5mm carbon spokes, and S&S ceramic bearings. This $1,300 upgrade drastically reduces rotational weight (~1460g) and slices through the wind.

2. Wheels Manufacturing Outboard Bottom Bracket: The stock pressfit BB was upgraded to a premium Wheels Mfg thread-together bottom bracket featuring high-end Angular Contact bearings. This completely eliminates the creaking issues common with standard pressfit brackets, delivering a rock-solid, incredibly smooth, and easily serviceable spin.

The bike is in excellent condition, meticulously maintained, and ready to fly.

Key Upgrades & Build Highlights

• Premium Wheel Upgrade: Elitewheels Drive 65D II Disc (65mm deep aero rims, hooked tubeless-ready, bladed 4.5mm carbon spokes, and ultra-smooth S&S Ceramic bearings).

• Bottom Bracket Upgrade: Wheels Manufacturing BB86/92 Outboard Angular Contact BB. Thread-together aluminum cups mean zero creaking, better bearing alignment, and ultimate power transfer.

• Drivetrain: Shimano Ultegra Di2 R8150 12-Speed Electronic Groupset for lightning-fast, perfect shifting.

• Cockpit: Premium Vision Metron 5D ACR Integrated Carbon Handlebar/Stem for a clean, completely hidden internal cable setup.

Detailed Specifications

Frameset

• Frame: ACX Performance Carbon, Aero Design, UCI Approved, Internal Cable Routing

• Fork: ACX Performance Carbon, Tapered 1-1/8" to 1-1/2", UCI Approved

• Frame Color: Jet Black / Raw Carbon Look

Drivetrain & Components

• Shifters: Shimano Ultegra Di2 ST-R8170 Hydraulic Disc, 2x12-Speed

• Front Derailleur: Shimano Ultegra Di2 FD-R8150

• Rear Derailleur: Shimano Ultegra Di2 RD-R8150, 12-Speed

• Crankset: Shimano Ultegra FC-R8100, 52/36T

• Cassette: Shimano Ultegra CS-R8100-12, 11-34T (12-Speed)

• Bottom Bracket (Upgraded): Wheels Manufacturing BB86-92 Outboard Angular Contact BB (Black anodized aluminum cups, thread-together design)

• Brakes: Shimano Ultegra BR-R8170 Hydraulic Disc

• Rotors: Shimano Ultegra RT-MT800 (160mm Front / 140mm Rear), Center Lock

Cockpit & Seating

• Handlebar/Stem: Vision Metron 5D ACR Integrated Carbon Bar/Stem

• Seatpost: Polygon Helios Carbon Aero Dedicated Post

Wheelset & Tires

• Wheels: Elitewheels Drive 65D II Carbon Disc

• Rim Depth: 65mm (Glossy Marbling Black Finish)

• Rim Width: 23mm Inner / 31mm Outer (Aerodynamically optimized for 28c–30c tires)

• Spokes: 4.5mm Bladed Carbon Spokes (21F/24R)

• Hubs: Kinetic Ratchet Hub (50T star ratchet) with high-grade precision S&S Ceramic Bearings

• Tires: Continental GP5000 TLR

Condition Notes

• Frameset: Excellent condition. Clean, structurally flawless, with only normal, light signs of use.

• Drivetrain: Shifting is crisp and precise. Di2 battery holds a perfect charge.

• Bottom Bracket: The Wheels Mfg bottom bracket is spinning flawlessly—silently, smoothly, and tight. Installed June 2026

• Wheels: The Elitewheels Drive 65D II wheelset is in pristine condition, perfectly true, spinning incredibly fast on its ceramic bearings. Installed May 2026

• Note: Pedals, bottle cages, saddle, and Garmin computer are not included.