The Eccentric Ring CR-48 is a precision-engineered chainring set developed for cyclists who ride with SRAM cranksets utilizing a 130mm BCD (Bolt Circle Diameter). Featuring a dual chainring setup of 53T and 41T, this component is built for road cyclists who demand maximum drivetrain efficiency, optimized shifting, and superior durability in high-performance riding conditions.

🔧 Technical Specifications:

• Product Code: CR-48

• Tooth Count: 53T (outer) / 41T (inner)

• BCD (Bolt Circle Diameter): 130mm – compatible with most SRAM road cranksets

• Material: AL7075-T6 (Heat-treated Aerospace-Grade Aluminum)

• Finish: Satin Black (S.B) anodized coating

• Design: Eccentric chainring with precise CNC-machining

• Branding: C.T laser-etched logo

⚙️ Material & Construction:

Crafted from AL7075-T6 aluminum, the CR-48 delivers exceptional stiffness-to-weight ratio, making it ideal for aggressive riders and racers. AL7075 is known for its high tensile strength, excellent fatigue resistance, and dimensional stability, ensuring long-lasting performance even under heavy pedaling loads.

Each chainring is CNC-machined to exact tolerances, ensuring flawless engagement with the chain, minimal friction, and enhanced durability. The Satin Black anodized finish adds a layer of protection against corrosion and wear, while giving the ring a clean, stealthy appearance.

🧠 Eccentric Design & Functionality:

Unlike standard chainrings, the eccentric design of the CR-48 introduces a subtle off-center alignment, improving chain tension during rotation. This leads to:

• Reduced chain slack

• Better chain retention

• Improved torque consistency and power delivery

• Enhanced shifting performance under load

This makes it particularly useful for time trialists, competitive road riders, or cyclists seeking marginal gains in drivetrain efficiency.

🔁 Compatibility:

• Works with SRAM cranksets that use a 130mm BCD interface

• Compatible with 9/10/11-speed chains and SRAM mechanical groupsets

• Ideal for riders upgrading their OEM chainrings or customizing their gear ratios

• Mounting requires standard 5-arm 130BCD crank spider

🚴 Use Case & Benefits:

• Excellent for road racing, criteriums, and competitive endurance rides

• Perfect for flat and rolling terrain where high-speed cadence is crucial

• The 53T outer ring delivers maximum speed on descents and straights, while the 41T inner ring allows smoother transitions for moderate climbs

• Provides clean aesthetics, premium material build, and consistent mechanical performance