The Eccentric Ring CR-49 is a premium-grade chainring set meticulously engineered for high-performance road cyclists using Shimano-compatible cranksets. Featuring a 51/36T configuration and a BCD110 interface, this chainring set is designed for riders seeking optimal gear ratios, smoother shifting, and long-lasting durability in both competitive and endurance riding scenarios.
🔧 Technical Specifications:
Model: CR-49 Eccentric Chainring
Tooth Count: 51T (outer) / 36T (inner)
BCD: 110mm – fits most 4-arm or 5-arm Shimano road cranksets
Material: AL7075-T6 Aluminum (Aerospace-grade)
Finish: Satin Black anodized for enhanced corrosion resistance
Logo: C.T Laser-etched branding
Design Type: Eccentric (slightly offset) for enhanced chain tension optimization
⚙️ Performance & Design Insights:
Crafted from AL7075-T6, one of the highest-grade aluminum alloys used in cycling components, the CR-49 delivers exceptional stiffness and strength-to-weight performance. It is significantly more resistant to wear and deformation than standard aluminum, making it ideal for riders who put heavy mileage on their drivetrain or race in harsh conditions.
The 51T outer ring enables fast, high-efficiency pedaling on flats and descents, while the 36T inner ring provides excellent climbing support. This combination (often favored over 53/39T setups) gives riders better cadence control and smoother transitions between power zones, making it ideal for varied terrain and modern compact gearing strategies.
The eccentric profile is subtly designed to help maintain better chain alignment and tension, particularly under torque-heavy pedaling. This helps reduce chain slap, minimize drivetrain wear, and can even enhance front shifting reliability—especially under load.
🔄 Compatibility & Integration:
Compatible with Shimano 9/10/11-speed systems using 110mm BCD cranksets
Works seamlessly with most Shimano road cranks including 105, Ultegra, and compatible aftermarket systems
Precision-machined mounting holes ensure secure fit and minimal flex
Pairable with standard inner/outer Shimano chainring bolts (5-arm or 4-arm spider design, depending on crankset type)
🚴♂️ Use Case Scenarios:
Ideal for road cyclists, endurance riders, and performance-focused athletes
Excellent for training, racing, or long-distance touring on mixed elevation profiles
Suitable for riders upgrading from OEM components to lighter, more durable gear
