SENIX ROAD CHAINRINGS 100 X 4 BCD R7100/R8100/R9200

The Precise Alternative for Modern Drivetrains.

The Senicx Road Chainrings are engineered for cyclists seeking a high-performance, cost-effective replacement or upgrade for their 12-speed Shimano cranksets. Specifically designed to interface seamlessly with the latest R7100 (105), R8100 (Ultegra), and R9200 (Dura-Ace) series, these chainrings maintain the precise shifting quality and aesthetic flow of the original equipment. Whether you are replacing a worn-out set or looking to experiment with different gearing ratios, Senicx provides a robust solution that doesn't compromise on drivetrain efficiency.

Constructed from high-strength 7075-T6 Aluminium alloy, these rings are CNC-machined to exacting tolerances. This ensures a high level of stiffness, which is critical for crisp, reliable front shifting under load. The tooth profiles are meticulously shaped to work with the narrower 12-speed chains, featuring specialised pick-up pins and ramps that facilitate smooth transitions between the small and large rings, even during high-cadence efforts or out-of-the-saddle climbs.

Key Features

• Shimano 12-Speed Optimised: Specifically profiled to match the shifting ramps and tooth dimensions required for R7100, R8100, and R9200 groupsets.

• 110 BCD 4-Arm Design: Direct "bolt-on" compatibility with modern Shimano asymmetric 4-arm crank spiders, ensuring a perfectly flush fit and integrated look.

• CNC-Machined 7075-T6 Aluminium: High-grade aerospace alloy provides an excellent strength-to-weight ratio and maintains chainring stiffness for precise shifting.

• Hard-Anodised Finish: Features a durable, wear-resistant coating that increases the longevity of the teeth and protects the rings against the elements.

• Advanced Shifting Ramps: Integrated steel pins and CNC-machined ramps work in harmony to ensure fast, quiet, and reliable chain movement under tension.

• Weight-Optimised Profile: Excess material is removed where possible to minimise rotational mass without sacrificing the structural integrity needed for sprinting.

Technical Specifications

✅ Why This IS For You

• Value-Conscious Racers: If you need to replace your drivetrain consumables without the premium "big brand" price tag, while still demanding pro-level shifting performance.

• Drivetrain Customisers: Perfect for riders who want to change their gearing ratios (e.g., moving from 52/36 to 50/34) while maintaining a clean, integrated aesthetic on their Shimano cranks.

• High-Mileage Commuters: Ideal for those who put in massive kilometres and want a durable, hard-wearing alternative to original Shimano rings.

❌ Why This May NOT be for you

• Classic 5-Bolt Crank Owners: These are designed specifically for the asymmetric 4-arm standard; they will not fit older 5-bolt or symmetric 4-bolt cranksets.

• SRAM AXS Users: While they may work with some setups, these are optimised for Shimano chain profiles; for SRAM 12-speed (Flattop) systems, a dedicated Flattop-compatible ring is recommended.

BFC Pro Tip

When installing your new Senicx chainrings, always use a high-quality torque wrench to tighten the chainring bolts to the manufacturer's specification (usually around 12-14Nm for Shimano). Unevenly torqued bolts can lead to minor warping of the ring, which causes "chain rub" and inconsistent shifting. It is also the perfect time to install a fresh 12-speed chain—putting a stretched, old chain onto brand-new rings will significantly accelerate the wear on your new teeth!