How Apex XPLR Enhances Gear Range for Gravel Adventures

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Introduction

The SRAM Apex XPLR [paid link] is a cutting-edge gravel-specific drivetrain component designed to enhance the gear range and performance of your bike on rough and variable terrain. With its wide-range cassette and reliable shifting capabilities, the Apex XPLR is a perfect choice for cyclists who tackle gravel roads and mixed-terrain rides. This guide will cover the installation, adjustment, maintenance, and optimization of the Apex XPLR system to ensure you achieve the best performance during your gravel adventures.

Tools Required

  • 5mm and 6mm Allen wrenches [paid link]
  • Chain tool
  • Torque wrench
  • 11-speed chain tool
  • B-tension tool
  • Derailleur hanger alignment tool
  • Cable cutters
  • Chain checker tool
  • Chain lube

Installation of Apex XPLR Drivetrain

Installing the Apex XPLR Rear Derailleur

  1. Remove the old derailleur: If you’re replacing an existing derailleur, first remove it by unscrewing the derailleur mounting bolt with a 5mm Allen wrench.
  2. Install the Apex XPLR derailleur: Attach the Apex XPLR rear derailleur to the derailleur hanger. Tighten the mounting bolt to the recommended torque value (usually 6-8 Nm). Ensure the derailleur hanger is straight; use a derailleur hanger alignment tool if necessary.
  3. Install the derailleur hanger: If the derailleur hanger is bent or damaged, replace it before installing the derailleur. A straight derailleur hanger is crucial for smooth shifting.

Installing the Cassette

  1. Remove the rear wheel: If the wheel is already installed, remove it by loosening the quick release or thru-axle.
  2. Install the Apex XPLR cassette: The Apex XPLR cassette features a wide range of gears with a 10-44T spread. Slide the cassette onto the freehub body. Make sure it is properly aligned with the splines. Tighten the lockring with a cassette tool to the correct torque value (40-50 Nm).

Installing the Chain

  1. Measure the chain length: Use a chain checker tool to determine the correct length for your chain. The Apex XPLR drivetrain works best with an 11-speed chain.
  2. Install the chain: Thread the chain through the front and rear derailleur, ensuring it runs smoothly through the jockey wheels. Join the chain using a quick link or chain pin, and use a chain tool to secure the connection.
  3. Check for correct chain tension: The chain should not be too loose or too tight. Adjust the derailleur’s B-tension screw if necessary to optimize chain tension.

Setting Up the Front Shifter (if applicable)

  1. Mount the shifter: Install the SRAM Apex XPLR front shifter onto the handlebars using a 5mm Allen wrench. Ensure it is positioned at a comfortable reach for your fingers.
  2. Install the shift cables: Run the shift cables through the frame and connect them to the shifter. Tighten the bolts to ensure the cables are securely attached.

Adjusting the Apex XPLR Drivetrain

Rear Derailleur Adjustment

  1. Set the limit screws: Use the limit screws on the rear derailleur to adjust the range of movement. The low limit screw controls the smallest cog, and the high limit screw controls the largest cog. Ensure the derailleur can shift smoothly across the entire cassette without overshooting or skipping gears.
  2. Fine-tune the indexing: Use the barrel adjuster to fine-tune the shifting. Adjust the barrel adjuster at the rear derailleur or shifter to make sure the chain moves precisely from one cog to the next without hesitation.

Front Derailleur Adjustment (if applicable)

  1. Adjust the front derailleur position: Ensure the front derailleur is positioned properly above the chainring and aligned with the drivetrain.
  2. Set the limit screws: As with the rear derailleur, set the limit screws to ensure the derailleur moves smoothly across the chainrings. Adjust the barrel adjuster for smooth shifting.

Maintenance of Apex XPLR Drivetrain

Cleaning and Lubing

  1. Clean the drivetrain: Regularly clean the drivetrain, especially after long gravel rides, to prevent dirt and debris buildup. Use a degreaser to clean the cassette, chain, and derailleur, followed by a thorough rinse.
  2. Lubricate the chain: After cleaning, dry the chain completely before applying a suitable lubricant. Apply lube to each link, wipe off the excess, and allow it to penetrate the chain.

Checking and Replacing Worn Components

  1. Inspect the chain for wear: Use a chain checker tool to measure the chain’s wear. If the chain is stretched or worn beyond the recommended limit, replace it with a new 11-speed chain.
  2. Inspect the cassette and derailleur: Regularly inspect the cassette and derailleur for any signs of wear, such as skipping gears or chain noise. Replace any damaged or excessively worn parts promptly to maintain smooth shifting performance.

Troubleshooting Common Set-Up Issues

Poor Shifting Performance

  • Cause: Incorrect derailleur alignment or poor cable tension.
  • Solution: Check the derailleur hanger alignment and make sure the derailleur is correctly positioned. Adjust the cable tension and ensure the limit screws are properly set.

Chain Slippage or Skipping Gears

  • Cause: Worn-out chain or cassette, or misaligned derailleur.
  • Solution: Check for chain wear using a chain checker tool. Replace the chain or cassette as needed. Ensure the derailleur is properly aligned and the B-tension screw is adjusted for optimal chain tension.

Unresponsive Shifters

  • Cause: Cable stretch or friction.
  • Solution: Check the cable for any signs of fraying or stretching. Replace the cables if needed, and lubricate them to reduce friction. Ensure proper cable tension is set at both the shifter and derailleur.

Customization and Optimization for Better Performance

Adjusting Gear Ratios

The Apex XPLR features a wide 10-44T cassette, which offers a broad range of gears perfect for gravel terrain. However, you may want to customize your gear range depending on your preferred riding style or terrain. Consider swapping out the chainring for a larger or smaller one to fine-tune your gear ratios for climbing or high-speed descents.

Fine-Tuning the Front Derailleur (if applicable)

If you’re using the Apex XPLR system with a front derailleur, adjusting the position of the derailleur can help optimize shifting performance. Ensure it’s correctly aligned with the chainrings and that the derailleur moves freely without obstruction.

Upgrading to a Wide Range Chainring

For even greater gear range, some riders choose to install a wide-range chainring. This can complement the 10-44T cassette by offering easier climbing gears or faster descending options. Be mindful that upgrading to a larger chainring may require adjusting the chain length and derailleur capacity.

Comparison with Similar Models

Apex XPLR vs. Rival XPLR

While both the Apex XPLR and Rival XPLR provide excellent gravel performance, the Apex XPLR is designed as a more budget-friendly option without sacrificing too much performance. The Rival XPLR offers a slightly smoother shift feel and a wider range of gearing but comes at a higher price point. If you’re looking for a cost-effective yet reliable gravel drivetrain, the Apex XPLR is an excellent choice.

Apex XPLR vs. Force XPLR

The Force XPLR is built for those who demand the highest performance, with more advanced materials, lighter weight, and crisper shifting. However, for most gravel riders, the Apex XPLR offers similar performance at a significantly lower price. Riders seeking durability and affordability will find the Apex XPLR to be a perfect fit for gravel adventures.

Understanding Compatibility with Other Drivetrain Components

The Apex XPLR drivetrain is compatible with SRAM’s 11-speed cassettes and chainrings, ensuring smooth integration with other SRAM components. It can be paired with a wide range of cranksets, but it is essential to ensure that the front derailleur is compatible with the chainring sizes being used. Additionally, the Apex XPLR works seamlessly with SRAM’s 11-speed chains, which is crucial for optimal performance and durability.

When pairing the Apex XPLR with other drivetrain components, such as shifters and brakes, ensure that you are using components from the same group to avoid compatibility issues. This will ensure smooth shifting, braking, and overall bike performance.