The Spécialités TA X110 12V Inner chainring is a premium solution for optimizing your Shimano 12-speed drivetrain. Designed and manufactured in France by one of the historic specialists in bicycle chainrings, this high-end component stands out with its 100% CNC machined aerospace-grade 7075-T6 aluminum construction, guaranteeing lightness, exceptional rigidity, and optimal longevity against the demands of the road.

Compatibility and versatility

This inner chainring fits perfectly on Shimano road cranksets with 110 mm 4-arm bolt circle diameter, covering Shimano Dura-Ace R9200, Ultegra R8100, 105 R7100 groupsets, as well as older generation Dura-Ace FC-09 and Ultegra FC-08. Thanks to an exceptionally wide range of available tooth counts — from 33 to 44 teeth — you can customize your gear ratio according to your riding style, from pure climber to demanding time trialist, where manufacturers often impose limited configurations.

Technologies and performance

• Aerospace-grade 7075-T6 alloy: material offering an exceptional strength-to-weight ratio, used in aerospace for its superior mechanical properties
• Full CNC machining: maximum dimensional precision, eliminating any run-out and guaranteeing constant chain tension
• Optimized 12V tooth profile: specifically designed for Shimano 12-speed chain architecture, ensuring smooth and precise shifting
• Black anodizing: refined finish providing lasting protection against corrosion and wear
• Featherweight: approximately 36 to 38 grams depending on tooth count, reducing rotating mass for greater responsiveness

Installation and usage recommendations

To guarantee optimal shifting performance, Spécialités TA recommends pairing this inner chainring with an X110 12V outer chainring, maintaining a gap of 12 to 16 teeth between the two. Installation requires the use of a specific cover and bolt kit adapted to your crankset (R7100, R8100, or R9200), allowing you to recreate the aesthetics and perfect integration of original chainrings while benefiting from the flexibility of TA tooth counts.

Available variants

• 33 teeth: ideal for alpine passes and very hilly routes, EAN 3662458018364
• 34 teeth: versatile compact configuration
• 36 teeth: climber/time trialist compromise
• 38 teeth: mixed road/medium mountain use
• 39 teeth: classic road standard
• 40 teeth: time trialist oriented
• 42 teeth: large gears for flat terrain
• 44 teeth: maximum for powerful cyclists

Each tooth count offers the same guarantees of quality, 12V compatibility, and French manufacturing. The choice depends solely on your cyclist profile, your riding terrain, and the desired gear ratio.

French craftsmanship and quality commitment

Designed and produced 100% in France in the Spécialités TA workshops in Sissonne, this chainring embodies the excellence of a historic manufacturer founded in 1947. Each piece benefits from rigorous quality control and expertise passed down through generations. By choosing Spécialités TA, you support the French cycling industry and equip your bike with a component whose reputation is well established among the most demanding cyclists.