Why Your Shimano FC-5700 Crankset Might Not Be Set Up Correctly and How to Fix It

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A properly installed and adjusted crankset is crucial for smooth power transfer and optimal cycling performance. The Shimano FC-5700 [paid link] crankset, part of Shimano’s 105 groupset, is known for its durability, efficient power transfer, and sleek design. However, like any other component, it can face issues if not set up correctly. If your Shimano FC-5700 [paid link] crankset isn’t functioning properly, it can lead to discomfort, poor performance, and potential damage to your bike’s drivetrain.

In this guide, we’ll take a detailed look at why your Shimano FC-5700 [paid link] crankset might not be set up correctly and how to resolve these issues.

Common Shimano FC-5700 Crankset Setup Issues

Before delving into solutions, let’s first identify some of the common issues cyclists face with improper crankset setup:

  1. Loose or Wobbly Crankset: This is one of the most frequent issues and can result from incorrect installation of the crank arm bolts or bottom bracket misalignment.
  2. Power Loss or Inefficient Pedaling: A poorly aligned crankset can lead to uneven power transfer, resulting in less efficient pedaling.
  3. Crankset Noise: Squeaks, creaks, or rattling sounds often indicate that parts of the crankset are not installed correctly or are in need of maintenance.
  4. Crank Arm Slippage: If the crank arms slip on the spindle, it can be due to improper torque on the crank arm bolts or insufficient lubrication.
  5. Chainline Misalignment: Incorrect chainline due to improper installation can result in shifting issues and reduced drivetrain efficiency.

How to Fix a Loose or Wobbly Shimano FC-5700 Crankset

1. Check Bottom Bracket Installation

The Shimano FC-5700 crankset requires a correctly installed bottom bracket for stable power transfer. If the bottom bracket isn’t aligned or installed correctly, it can cause the crankset to feel loose or wobbly.

Solution:

  • Remove the crankset and inspect the bottom bracket for proper installation.
  • Ensure the bottom bracket is fully pressed into the frame and tightened to the correct torque specification.
  • Check for any signs of wear or damage to the bottom bracket. If needed, replace it with a new one.

2. Tighten the Crank Arm Bolts

Loose crank arm bolts are a common cause of a wobbly crankset. If the crank arms aren’t properly secured to the spindle, the entire crankset can feel unstable.

Solution:

  • Use a torque wrench [paid link] to tighten the crank arm bolts to the manufacturer’s recommended torque setting. For the Shimano FC-5700, this is typically around 12-14Nm for the bolts.
  • Apply a small amount of grease to the crank arm bolts to prevent seizing.
  • Make sure the bolts are evenly tightened and that the crank arms are seated correctly on the spindle.

How to Address Power Loss and Inefficient Pedaling

1. Inspect Crankset Alignment

Misaligned crank arms or an improperly mounted chainring can cause power loss. This is often the result of improper installation or adjustments during setup.

Solution:

  • Check if the crank arms are installed symmetrically on both sides of the bike.
  • Ensure that the chainring is correctly positioned and the bolts are tightened securely.
  • Use a crank arm alignment tool to check for any misalignment between the crank arms and the chainring.

2. Adjust the Bottom Bracket and Crankset Position

Improper positioning of the crankset can result in inefficient power transfer and discomfort while pedaling.

Solution:

  • Adjust the bottom bracket spacers to ensure the correct Q-factor (the distance between your pedals) for your riding style.
  • Ensure that the crankset is positioned centrally, with no lateral movement. This ensures that your pedaling power is transferred efficiently.

How to Fix Noisy Shimano FC-5700 Crankset

Crankset noise can be incredibly frustrating, especially when it’s coming from the crankset area. Common sources of noise include loose parts, dry bearings, or improper lubrication.

1. Lubricate the Crankset Components

Dry or improperly lubricated crankset parts can cause creaking or squeaking noises.

Solution:

  • Clean the crankset and apply a light layer of lubricant to the spindle, crank arm bolts, and the interface between the crank arms and the bottom bracket.
  • Be cautious not to over-lubricate, as this can attract dirt, leading to more problems.

2. Check for Bottom Bracket Issues

If the noise persists, it could be coming from the bottom bracket bearings.

Solution:

  • Ensure that the bottom bracket is properly lubricated and that the bearings are in good condition. If the bottom bracket has any signs of wear or roughness, it may need to be replaced.

Fixing Crank Arm Slippage

Crank arm slippage on the spindle is a serious issue that can lead to the crank arms loosening while riding, which can be dangerous.

1. Tighten Crank Arm Bolts

The primary cause of crank arm slippage is loose crank arm bolts. If they aren’t tightened to the correct torque, the crank arms can move independently of the spindle.

Solution:

  • Use a torque wrench [paid link] to tighten the crank arm bolts to the proper torque (12-14Nm).
  • Apply grease to the bolts to prevent rust and seizing.

2. Check the Crank Arm and Spindle Interface

If the crank arm continues to slip despite tightening the bolts, the interface between the crank arm and the spindle may be worn.

Solution:

  • Remove the crank arm and inspect the spindle for wear or damage. If the interface is worn, replacing the crank arm or spindle may be necessary.

How to Fix Chainline Misalignment

An incorrect chainline can cause poor shifting performance and reduced drivetrain efficiency. This is often the result of improper crankset installation or a misaligned bottom bracket.

1. Align the Chainring

The chainring must be positioned so that it is in line with the rest of the drivetrain components, particularly the rear cassette.

Solution:

  • Check the alignment of the chainring using a chainline tool.
  • Ensure the chainring is properly installed with no wobbling or misalignment.

2. Adjust the Bottom Bracket

Chainline issues can also stem from an incorrectly installed bottom bracket.

Solution:

  • Adjust the bottom bracket’s position by moving the spacers to achieve the correct chainline.
  • Ensure the bottom bracket is pressed fully into the frame and is at the correct torque setting.

Conclusion

Proper setup and maintenance of your Shimano FC-5700 crankset are crucial for optimal performance. Whether you’re dealing with loose components, noisy cranksets, or misalignment, following these troubleshooting steps will help restore your crankset to perfect condition. Always ensure that you follow manufacturer specifications for torque settings and maintenance intervals to prevent further issues and extend the lifespan of your components.