
( Brand: Sram ), ( Part Type: Bike Crank ), ( Compatible Brand: For Sram ), ( Color: Black ), ( Bottom Bracket Shell Type: Bb30 ), ( Material: Carbon ), ( Set Includes: Crank Arm ), ( Item Length: 170 Mm ), ( Number Of Speeds: 1 Speed ), ( Compatible Bike Type: Road Bike ), ( Number Of Chainrings: Single ), ( Item Weight: 425 G ), ( Item Width: 40 Mm ), ( UPC: 006118650000 )
The **SRAM 00.6118.650.000 Carbon Road Bike Left Crank Arm (Non-Driveside, 170mm BB30)** is a precision-engineered component designed for performance-oriented cyclists seeking both efficiency and durability in their road cycling setup. Crafted from high-grade carbon fiber, this crank arm delivers an optimal balance of stiffness, weight savings, and aerodynamic efficiency, ensuring a responsive ride with minimal energy loss. The **BB30 bottom bracket standard** a modern, high-end interface provides superior power transfer and compatibility with the latest drivetrain systems, making it an ideal choice for riders pushing the limits of speed and performance. Measuring **170mm in length**, this non-driveside arm is meticulously tuned to work seamlessly with its paired counterpart, offering a harmonious pedal stroke that enhances pedaling efficiency and reduces rotational weight. SRAM s proprietary design ensures a smooth, vibration-dampening ride while maintaining structural integrity under high-stress conditions, making it suitable for both competitive racing and demanding training sessions. The sleek, aerodynamic profile of the carbon construction also contributes to a cleaner airflow, reducing drag and improving overall efficiency. Whether integrated into a high-end road bike or a custom build, this crank arm exemplifies SRAM s commitment to innovation, precision, and performance, delivering a component that elevates the riding experience for discerning cyclists.
### **Pros and Cons of buying a SRAM 00.6118.650.000 Carbon Road Bike Left Crank Arm (Non-Driveside, 170mm, BB30)**
#### **Pros**
1. **High-Quality Carbon Construction** SRAM s carbon components are engineered for stiffness, lightweight performance, and durability, making this crank arm a reliable choice for serious cyclists.
2. **BB30 Bottom Bracket Compatibility** The 170mm BB30 standard is a modern, high-performance interface that reduces rotational mass and improves power transfer compared to older standards like Pressfit or Octalink. This is ideal for road bikes where efficiency matters.
3. **Non-Driveside Left Crank Arm** This is a replacement part, meaning you can pair it with an existing driveside crank arm (e.g., from a SRAM Red/Force or another compatible system) to restore or upgrade your crankset without buying a full set.
4. **Compatibility with SRAM Drivetrains** Works seamlessly with SRAM s GX, Force, or Red drivetrains, ensuring smooth shifting and reliable performance. If you re already using a SRAM system, this is a straightforward upgrade.
5. **Lightweight Design** Carbon crank arms reduce rotational weight, which can improve pedal efficiency, especially in time trials or high-cadence riding.
6. **Durability** SRAM s carbon components are built to withstand the stresses of road riding, though proper maintenance is still required to extend their lifespan.
7. **Ease of Installation** As a standalone part, it can be installed by a bike shop or experienced DIY cyclist with the right tools (e.g., crank arm puller, torque wrench).
8. **Cost-Effective Upgrade** Buying just the left crank arm is cheaper than purchasing a full crankset, making it a budget-friendly way to refresh an existing setup.
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#### **Cons**
1. **Limited Use Without a Driveside Arm** This is a non-driveside arm, meaning you ll need a matching driveside arm (e.g., SRAM 00.6117.650.000) to complete the crankset. Buying both may negate some of the cost savings.
2. **Potential Mismatch with Existing Crankset** If your current crankset uses a different bottom bracket standard (e.g., Pressfit, Octalink, or even a different BB30 length like 142mm), this part may not fit without additional adapters or modifications.
3. **No Chainring Included** Unlike some crankset bundles, this is just the arm, so you ll need to source a compatible chainring separately if replacing one.
4. **Resale Value Depreciation** Carbon components lose value quickly, so if you plan to sell the bike later, the cost of this upgrade may not be fully recouped.
5. **Installation Complexity** Removing and installing crank arms requires precision tools and care to avoid damaging the spindle or bottom bracket. DIY installation carries a risk of error if not done correctly.
6. **Warranty Limitations** SRAM s warranty may not cover damage from improper installation or misuse, so professional fitting is recommended.
7. **Potential Weight Savings Are Marginal** While carbon is lighter than aluminum, the difference between a carbon and aluminum crank arm may not be noticeable to casual riders. The real benefits (stiffness, power transfer) are more significant.
8. **Compatibility with Non-SRAM Components** If you re using a Shimano or other brand s bottom bracket or drivetrain, you may need to verify full compatibility, as some systems have proprietary interfaces.
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### **Conclusion**
This SRAM carbon crank arm is a solid choice for cyclists looking to upgrade or replace a worn-out or damaged non-driveside arm in a BB30 road crankset. It offers performance benefits in stiffness and weight savings, especially when paired with a compatible SRAM drivetrain. However, its usefulness is limited if you don t already have a matching driveside arm or a compatible bottom bracket setup.
If you re running a SRAM system and need a replacement left crank arm, this part is a practical and high-quality option. For casual riders or those on a tight budget, the performance gains may not justify the cost unless paired with other upgrades. If you re unsure about compatibility or installation, consulting a bike mechanic is advisable.
### **Recommendation**
- **Buy this part if:**- You already have a compatible driveside crank arm and BB30 bottom bracket.
- You re upgrading an existing SRAM crankset and want to maintain system consistency.
- You prioritize stiffness and lightweight performance in your riding.
- **Consider alternatives if:**- You don t have a matching driveside arm (e.g., buy a full crankset instead).
- Your bottom bracket isn t BB30-compatible (you may need adapters or a full crankset upgrade).
- You re unsure about installation professional fitting is recommended to avoid damage.
For most serious road cyclists using SRAM drivetrains, this is a worthwhile upgrade. For others, evaluating whether the cost aligns with your riding goals is key.
SRAM RED Carbon Road Bike Left Crank Arm Non-driveside 170mm Black BB30.