Alugear AERO Chainrings Set – 2x12sp Round for 110 BCD 4‑bolt Shimano Asymmetric

Product Overview

Technologically sound, extremely light, and unique in design. The ultimate AERO upgrade for your Shimano 12‑speed crankset.

The Alugear AERO Chainrings Set is a precision‑engineered 2×12‑speed replacement chainring set designed for Shimano's asymmetric 110 BCD 4‑bolt cranks. CNC‑machined from 7075‑T6 aluminium and hard‑coat anodised, these chainrings deliver a compelling combination of weight reduction, increased stiffness, visual integration, and an aero bonus—without the need to replace your entire crankset.

Whether you're upgrading your Dura‑Ace, Ultegra, or 105 groupset, the Alugear AERO chainrings offer a drop‑in solution that shaves grams, improves shifting performance, and gives your bike a distinctive, race‑inspired look.

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Key Features

🏆 Extreme Lightweight – Shed Grams Without Compromise

• Outer chainring (50T): 112g

• Outer chainring (52T): 127g

• Outer chainring (54T): 143g

• Inner chainring (34T): 26g

• Inner chainring (36T): 29g

• Inner chainring (40T): 40g

Using extensive experience and vigorous testing, Alugear engineers strategically machined the chainrings to achieve large gains in weight reduction with only minimal sacrifices in impact strength. The result is some of the lightest chainrings on the market.

⚙️ Precision CNC‑Machined from 7075‑T6 Aluminium

• Aerospace‑grade 7075‑T6 aluminium – renowned for its exceptional strength‑to‑weight ratio

• CNC‑milled from solid billet for precise tolerances and consistent quality

• Hard‑coat industrially anodised – provides protection from mechanical impacts, a premium look, and long‑lasting tactile feel

🚀 Optimised Shifting Performance – Shift Under Load with Confidence

• Special tooth profiles designed specifically for use with road chains

• Mounting and climbing aids facilitate particularly soft and fast shifting

• Enables shifting under load with ease

• The chainrings are specially tuned by climbing aids and achieve their superior shifting performance in the combinations provided by Alugear

🔇 Smooth, Quiet Operation

• Unique tooth profile eliminates chain noise and reduces wear

• Provides smooth operation across the entire drivetrain system

🎨 Distinctive AERO Design

• Original AERO design with a striking visual presence

• Aero cover (included with some configurations) enhances aerodynamic efficiency and completes the sleek, integrated look

• Available in Black with additional colour options

🏁 Race‑Ready Compatibility

• Specifically engineered for 2×12‑speed road and time trial use

• Compatible with Shimano HG+ 12‑speed chains and KMC 12‑speed chains

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Specifications

📦 Package Contents

AERO Kit (with Cover):

• 1× Outer chainring

• 1× Inner chainring

• 1× Aero cover with bolts

Standard Set (without Cover):

• 1× Outer chainring

• 1× Inner chainring

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Compatibility

✅ Compatible Cranksets:

• Shimano Dura‑Ace FC‑R9200 (12‑speed)

• Shimano Ultegra FC‑R8100 (12‑speed)

• Shimano 105 FC‑R7100 (12‑speed)

✅ Compatible Power Meter Cranks:

• Shimano Dura‑Ace FC‑R9200‑P

• Shimano Ultegra FC‑R8100‑P

✅ Compatible Chains:

• Shimano 12‑speed HG+ chains

• KMC 12‑speed chains

⚠️ Important Notes:

• The correct operation of the 2x set is guaranteed only when using Alugear outer and inner chainrings together

• Only use original ALUGEAR bolts during installation. Using other bolts may cause damage

• Requires 6.5 mm bolts and 7 mm nuts (sold separately for standard set)

• Tool required: 5 mm hexagon socket

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What Riders Are Saying

"My overall experience with Alugear's 2‑By Aero Chainrings for Shimano 12‑speed cranks left nothing to be desired. They are beautifully manufactured, and even upon close inspection I couldn't find any flaws. This is my second pair." — Denis, Switzerland

"Excellent quality components. The machining is very clean, the edges are sharp, and the anodizing is perfectly uniform." — Cycling-Review.net, France

"I think revised Alugear 2x is pretty good now, judging by reports of riders I know." — WeightWeenies Forum

"ALUGEAR is the simple answer to one precise problem: reduce weight, increase stiffness, improve visual integration and gain an aero bonus without changing the complete crankset." — Velo-Perso.com

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Why Choose Alugear AERO?

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Technical Notes

⚠️ Correct Operation: The superior shifting performance of these chainrings is achieved only when using the combinations specified by Alugear (50‑34, 52‑36, 54‑40, 56‑40)

⚠️ Chain Recommendation: For best results, use a new, well‑lubricated chain with your new Alugear chainrings

⚠️ Installation: Use only original ALUGEAR bolts to prevent damage to the cover and chainrings

⚠️ Tool: 5 mm hexagon socket required for installation

⚠️ Production: Most Alugear components are produced on demand. Each order goes through a dedicated processing period to ensure proper manufacturing, finishing, and quality control before shipping

⚠️ Warranty: 30‑day return policy for unused products

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About Alugear

Alugear (ALUGEAR ENGINEERS Sp. z o.o.) is a Polish manufacturer of high‑performance bicycle drivetrain components. Based in Borek Szlachecki, Poland, Alugear designs and manufactures its products entirely in‑house, ensuring precision, consistency, and uncompromised quality. From road and gravel to XC and enduro, Alugear components are engineered for riders who value performance, reliability, and clean engineering over compromise. Committed to quality and innovation, Alugear is a brand built by riders, for riders who care about how their bike rides, how it feels, and how it looks.

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Upgrade your drivetrain with Polish precision and AERO performance. Add the Alugear AERO Chainrings Set to your cart today!