Expert Opinions: Apex 1 (11-speed) Rear Derailleurs Reviewed

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The SRAM Apex 1 (11-speed) Rear Derailleur is a well-regarded component designed for road bikes, gravel bikes, and cyclocross bikes. It is part of SRAM’s Apex 1 series, which has gained popularity due to its simplicity, reliability, and cost-effectiveness. This article provides an in-depth review of the Apex 1 rear derailleur, focusing on its installation, adjustment, maintenance, troubleshooting, optimization, and compatibility.

Installation of the SRAM Apex 1 (11-speed) Rear Derailleur

Installing the SRAM Apex 1 rear derailleur is a straightforward process, but it requires attention to detail to ensure optimal performance. Below are the essential steps for a successful installation.

Tools Required

  • 5mm Allen wrench
  • 3mm Allen wrench
  • Chain tool
  • Torque wrench (optional but recommended)
  • Cable cutter
  • Lubricant (for the derailleur pivot points)

Installation Steps

  1. Remove the old derailleur (if applicable) using the 5mm Allen wrench to unscrew the derailleur hanger bolt.
  2. Attach the new derailleur by securing it to the derailleur hanger with the 5mm Allen wrench.
  3. Install the chain: Ensure that the chain is routed correctly through the derailleur. Use a chain tool to size the chain appropriately for your bike setup.
  4. Connect the derailleur to the derailleur hanger: Use the 5mm Allen wrench to tighten the hanger bolt to the recommended torque specification (typically around 7-8 Nm).
  5. Install the shift cable: Using a 3mm Allen wrench, attach the shift cable to the derailleur’s cable clamp.
  6. Adjust the B-screw: Position the derailleur so that the upper jockey wheel is at an appropriate distance from the cassette. This adjustment ensures smooth shifting.
  7. Test the derailleur movement: Shift through all the gears manually before tightening everything to ensure smooth operation.

Adjustment of the SRAM Apex 1 (11-speed) Rear Derailleur

Proper adjustment of the Apex 1 rear derailleur is critical for ensuring smooth and precise shifting. The primary adjustments involve the barrel adjuster, limit screws, and B-screw.

Barrel Adjuster

  • The barrel adjuster is used to fine-tune the tension of the shift cable. If shifting feels sluggish or if the derailleur is not moving correctly, you can use the barrel adjuster to correct the cable tension.
  • To increase tension (improve shifting performance), turn the barrel adjuster counterclockwise. To reduce tension (resolve issues like chain skipping), turn it clockwise.

Limit Screws

  • The limit screws are responsible for controlling how far the derailleur moves when shifting to the smallest and largest gears.
    • High limit screw: Prevents the derailleur from overshooting the smallest cog.
    • Low limit screw: Ensures the derailleur does not move past the largest cog.
  • Use a 3mm Allen wrench to adjust these screws. Start by setting the derailleur to the smallest cog and adjust the high limit screw, then move to the largest cog for low limit screw adjustment.

B-Screw Adjustment

  • The B-screw determines the gap between the derailleur’s upper jockey wheel and the cassette. The correct B-screw setting helps optimize chain clearance and shifting efficiency.
  • Adjust the B-screw by turning it clockwise or counterclockwise, ensuring that the gap is approximately 5-7mm when in the smallest cog.

Maintenance of the SRAM Apex 1 (11-speed) Rear Derailleur

Maintaining the SRAM Apex 1 rear derailleur will extend its lifespan and keep it performing at its best. Routine maintenance ensures smooth shifting and can prevent issues like chain drop, derailleur noise, or skipping.

Regular Cleaning

  • Clean the derailleur regularly, especially after riding in muddy or wet conditions. Use a soft brush and mild degreaser to remove dirt and grime from the derailleur body and jockey wheels.
  • Lubricate the derailleur’s pivot points with a small amount of grease to keep them operating smoothly.

Cable and Housing Maintenance

  • Inspect the shift cables and housing for wear. If the cable is frayed or the housing is cracked, replace them immediately to prevent poor shifting performance.
  • Ensure the shift cable is properly tensioned. If you notice sluggish shifting or difficulty shifting between gears, the cable may require adjustment.

Jockey Wheel Inspection

  • The jockey wheels can accumulate dirt over time, causing them to wear prematurely. Clean them frequently, and replace them when they show signs of excessive wear such as rough spinning or play.

Troubleshooting Common Set-Up Issues

While the SRAM Apex 1 is a reliable and straightforward derailleur, several issues can arise during the set-up or maintenance process. Here’s how to troubleshoot the most common problems.

Issue 1: Shifting Is Sluggish or Inconsistent

  • Cause: This can be due to insufficient cable tension or dirt in the derailleur mechanism.
  • Solution: Adjust the barrel adjuster to increase cable tension. If the derailleur is dirty, clean it thoroughly and lubricate the pivot points.

Issue 2: Chain Drops off the Cassette

  • Cause: This can happen when the derailleur is not aligned properly or the limit screws are not correctly set.
  • Solution: Check the derailleur alignment with the cassette, and ensure the limit screws are adjusted correctly. Make sure the B-screw setting is correct to avoid excessive movement of the derailleur.

Issue 3: Cross-Chaining Is Difficult

  • Cause: Cross-chaining, or shifting to extreme gears (small front, large rear or large front, small rear), can cause issues with derailleur performance.
  • Solution: Avoid cross-chaining as it puts unnecessary stress on the drivetrain. However, if this is causing shifting problems, ensure that the derailleur is properly aligned and the chain length is correct.

Customization and Optimization for Better Performance

The SRAM Apex 1 rear derailleur can be customized and optimized to suit different riding styles and preferences. Here are some tips for getting the most out of your Apex 1 setup:

  • Gear Ratio Adjustment: The Apex 1 system is designed to work with wide-range cassettes. Opt for a cassette with a larger cog size (up to 42T) for better climbing ability on steep terrain.
  • Chainring Size: Combine the Apex 1 rear derailleur with a 1x crankset and a larger chainring for optimal performance, especially on gravel and cyclocross bikes.
  • Shifter Pairing: Pair the Apex 1 rear derailleur with SRAM’s Apex 1 shifter for seamless, smooth shifting performance.

Comparison with Similar Models

The SRAM Apex 1 rear derailleur offers excellent performance at a budget-friendly price point, but how does it compare to other models in SRAM’s lineup, such as the Force 1 and Rival 1?

  • SRAM Force 1: The Force 1 is a more premium offering, featuring a lighter weight and smoother shifting under load. The Apex 1, however, is a more affordable choice and offers many of the same performance benefits at a lower price.
  • SRAM Rival 1: Similar to the Force 1, the Rival 1 is aimed at riders looking for higher performance. It features better materials and slightly improved weight savings. The Apex 1, while not as high-end, still performs admirably in most riding conditions and offers better value for money.

Compatibility with Other Drivetrain Components

The SRAM Apex 1 (11-speed) rear derailleur is designed to work with other 11-speed components from SRAM’s 1x groupsets. Compatibility with other brands, such as Shimano, may be limited due to differences in cable pull and shift actuation.

  • Cassette Compatibility: The Apex 1 works best with SRAM 11-speed cassettes, such as the PG-1130. It may also work with other 11-speed cassettes, but it is recommended to match it with SRAM’s 1x cassettes for optimal performance.
  • Crankset Compatibility: The Apex 1 is compatible with any SRAM 1x crankset and can be paired with a wide variety of chainring sizes to optimize your gearing range for different terrains.
  • Shifter Compatibility: The Apex 1 rear derailleur is most compatible with the SRAM Apex 1 shifter. Using a different SRAM shifter (like Force 1 or Rival 1) may cause shifting inconsistencies, as these components are specifically designed to work together.

In conclusion, the SRAM Apex 1 (11-speed) rear derailleur provides a reliable, cost-effective solution for riders looking to optimize their 1x drivetrain setup. With proper installation, regular maintenance, and careful adjustments, it can deliver high performance across various riding disciplines.