How to Install, Adjust, and Maintain the Shimano ST-5800 Shifters

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in 105, Shifters, Shimano

The Shimano ST-5800 [paid link] shifters are part of Shimano’s 105 series, designed to provide cyclists with reliable and precise gear changes. These shifters are a popular choice for both entry-level [paid link] and mid-range road bike enthusiasts. Whether you’re installing them for the first time, adjusting them for smooth performance, or performing regular maintenance, this comprehensive guide will walk you through the entire process.

Tools Required

  • Shimano ST-5800 [paid link] Shifters
  • 5mm Allen wrench [paid link]
  • Flathead screwdriver
  • Phillips screwdriver
  • Cable cutters
  • Chain whip (for rear derailleur adjustments)
  • Torque wrench [paid link] (optional, but recommended)
  • Bike stand [paid link] (for ease of adjustment)
  • Lubricant (for cables)
  • Rags or cleaning cloths

Introduction to Shimano ST-5800 Shifters

The Shimano ST-5800 [paid link] shifters are part of Shimano’s 105 series, a group of components designed for cyclists looking for a good balance of performance and price. The ST-5800 offers smooth shifting in both the front and rear derailleurs, making them an ideal choice for cyclists wanting reliable performance without breaking the bank.

These shifters are designed for 11-speed drivetrains, and they utilize Shimano’s signature dual-control lever system. The left lever controls the front derailleur while the right lever controls the rear. They are compatible with Shimano 11-speed road derailleurs and come with an ergonomic design that offers comfort over long rides.

How to Install the Shimano ST-5800 Shifters

Installing the Shimano ST-5800 shifters involves several key steps, from removing the old shifters to adjusting the new ones for optimal performance. Follow these steps for a successful installation.

Step 1: Remove Old Shifters

  1. Use a 5mm Allen wrench [paid link] to remove the bolts securing the old shifters to the handlebars.
  2. Slide the shifters off the handlebars carefully.
  3. If reusing cables, cut them at the base near the cable stops using cable cutters, but be careful not to damage any components in the process.

Step 2: Install the Shimano ST-5800 Shifters

  1. Slide the Shimano ST-5800 shifters onto the handlebars. Ensure they are positioned comfortably and at the desired angle.
  2. Tighten the 5mm bolts on both the left and right shifters using the Allen wrench [paid link]. Ensure they are tight but not over-torqued (a torque wrench [paid link] can be used for precise adjustments).
  3. Verify that both shifters are aligned and properly secured.

Step 3: Route the Cables

  1. Begin by attaching the shift cables to the respective derailleur bosses (front and rear). Insert the cables into the shifter’s cable entry points, ensuring they are routed correctly.
  2. For the rear derailleur, ensure the cable is routed through the cable stop and then to the derailleur body.
  3. Repeat the process for the front derailleur, ensuring the cable enters the shifter housing properly and the path is free of kinks or twists.

Step 4: Install the Brake Levers

  1. The ST-5800 shifters also integrate brake levers, so ensure that the brake cables are routed through their respective housings and attached to the brake calipers.
  2. Tighten the brake bolts on both the front and rear brake calipers. Adjust the brake pad positioning as necessary.

Step 5: Adjust Cable Tension

After installing the shifters and cables, adjust the cable tension for optimal shifting performance. This involves fine-tuning both the front and rear derailleurs to ensure smooth and accurate gear transitions.

How to Adjust the Shimano ST-5800 Shifters for Smooth Shifting

Proper adjustment of the Shimano ST-5800 shifters ensures smooth, precise shifting. Follow these steps to adjust the cable tension and derailleur settings for a seamless experience.

Front Derailleur Adjustment

  1. Cable Tension: Using the barrel adjuster, fine-tune the cable tension until the front derailleur moves freely between the large and small chainrings.
  2. Limit Screws: Adjust the limit screws on the front derailleur to ensure the chain does not overshoot either the smallest or largest chainring. Turn the “L” screw to adjust the inner limit and the “H” screw for the outer limit.
  3. Trim Shifter: Use the trim function on the left shifter to ensure smooth shifting when moving between the chainrings.

Rear Derailleur Adjustment

  1. Cable Tension: Adjust the cable tension using the barrel adjuster on the rear derailleur or the shifter itself to fine-tune shifting accuracy.
  2. Limit Screws: Set the low and high limit screws to prevent the chain from overshooting either the smallest or largest cog in the cassette.
  3. Indexing: Shift through all the gears and check for accurate gear indexing. Use the barrel adjuster to fine-tune indexing, ensuring that each shift is smooth.

How to Maintain Your Shimano ST-5800 Shifters

Maintaining your Shimano ST-5800 shifters will help extend their lifespan and keep your shifting performance at its best. Here are the key maintenance tips.

Cleaning and Lubrication

  1. Clean the Shifters: Regularly wipe down the shifters with a clean cloth to remove dirt, grime, and moisture.
  2. Lubricate the Cables: Apply a light coat of lubricant to the cables to prevent rust and reduce friction. This ensures smooth shifting and reduces wear on the shifter internals.
  3. Brake Levers Maintenance: Ensure that brake levers are clean and free of debris. If the brake system is hydraulic, check the fluid levels and adjust them as necessary.

Cable Tension Check

Regularly inspect the cable tension and make necessary adjustments using the barrel adjusters on both the front and rear derailleurs. Inadequate cable tension can lead to poor shifting performance.

Inspect for Wear and Tear

Check for any frayed cables or excessive wear on the shifters themselves. If the shifters feel stiff or unresponsive, it might be time to replace the cables or even the shifter internals.

Troubleshooting Common Shimano ST-5800 Shifter Issues

Despite their high performance, Shimano ST-5800 shifters can sometimes present issues that affect shifting quality. Here’s how to troubleshoot and solve the most common problems.

Shifting Is Not Smooth

If your shifting feels sluggish or unresponsive:

  1. Check the cable tension. Too little tension may cause the derailleur to miss shifts, while too much can cause sluggish shifting.
  2. Inspect the chain for any signs of wear or damage.
  3. Make sure the derailleur hanger is aligned properly.

Chain Drops or Skips Gears

If your chain drops or skips gears:

  1. Ensure the limit screws are set properly.
  2. Inspect your chainrings and cassette for wear.
  3. Check the rear derailleur hanger for alignment.

Comparison with Shimano ST-5800’s Competitors

When comparing the Shimano ST-5800 to other models like the Shimano Tiagra 4700 or SRAM Rival, the ST-5800 offers better precision and feel in shifting, though it’s priced slightly higher than the Tiagra series. It’s considered a solid mid-range option that is often found on road bikes for recreational riders and competitive cyclists alike.