How to Adjust the Length of Your SRAM PC-1170 Chain

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The SRAM PC-1170 [paid link] chain is known for its smooth, efficient shifting and long-lasting performance. However, proper length adjustment is crucial to ensuring your bike’s drivetrain functions smoothly and avoids unnecessary wear and tear. In this guide, we will walk you through how to adjust the length of your SRAM PC-1170 [paid link] chain to achieve optimal performance.

Why Adjust the Chain Length?

Adjusting the length of the SRAM PC-1170 chain is essential for several reasons:

  • Smooth Shifting: If the chain is too long or too short, it can affect shifting performance, causing skips or difficulty in shifting between gears.
  • Preventing Excessive Wear: An incorrect chain length can lead to uneven wear on the cassette and chainrings, resulting in reduced lifespan for your drivetrain.
  • Optimizing Power Transfer: Properly sized chains help in maximizing the efficiency of your pedaling power, ensuring that every stroke is effectively transferred to the wheels.

Tools Required

Before starting, gather the necessary tools:

  • SRAM PC-1170 Chain Tool (or compatible chain tool)
  • A chain checker tool (for measuring chain wear)
  • A ruler or chain length measuring tool
  • A master link (if applicable)
  • A rag or towel for cleaning
  • A lubricant (optional, for re-lubing the chain after adjustment)

Step-by-Step Guide to Adjusting the Length of Your SRAM PC-1170 Chain

Step 1: Remove the Chain

To properly adjust the length of the SRAM PC-1170 chain, you must first remove it from the bike. Follow these steps:

  1. Use a chain tool to remove the chain from your bike. If your chain uses a master link, remove it by carefully unlocking the link using a master link tool.
  2. Clean the chain with a rag if it’s dirty. This will make it easier to inspect and measure the chain length.

Step 2: Measure the Required Chain Length

The length of the chain is critical for smooth and efficient operation. Too long a chain will result in poor shifting and the risk of derailleur cage damage, while too short a chain can lead to improper shifting and increased strain on the drivetrain.

  1. Find the largest cog and the largest chainring on your bike. These are the gears you’ll be shifting into during extreme conditions, so they determine the minimum length needed.
  2. Lay the chain flat on a clean surface and use a chain length measuring tool or ruler to measure the distance. Align the chain’s pins with the tool or ruler.
  3. Determine the correct length by calculating the chain size. Wrap the chain around the largest cog and the largest chainring, ensuring it is taut but not tight. Mark where the ends of the chain meet and add two full links to ensure there is enough slack for smooth operation.

Step 3: Remove Excess Links

Once you’ve identified where the chain needs to be shortened, it’s time to remove the excess links.

  1. Use a chain tool to push out the pins on the links you need to remove. Be sure to remove links evenly from both sides to maintain chain symmetry.
  2. If you’re not sure how many links to remove, it’s better to remove small amounts at a time and recheck the fit after each adjustment.
  3. After removing the desired number of links, reconnect the chain using the chain tool. If you used a master link, reattach the link and ensure it is securely locked.

Step 4: Reinstall the Chain

Once the chain is adjusted to the correct length, it’s time to reinstall it on the bike.

  1. Install the chain back onto the bike, ensuring that it runs smoothly through the derailleurs.
  2. Ensure the chain is properly threaded through the front and rear derailleurs, ensuring that it does not rub against the frame or derailleur cages.

Step 5: Test the Chain for Proper Fit

Now that the chain is reinstalled, it’s time to check if it fits correctly.

  1. Shift through all gears on your bike to ensure the chain moves smoothly without skipping or slipping.
  2. Check the chain’s tension and adjust the derailleur if needed.
  3. Confirm that the chain is not too tight or too loose. If necessary, make slight adjustments to the length again.

Common Issues When Adjusting Chain Length

  • Chain too tight: This can cause poor shifting performance and can lead to excess wear on your drivetrain. Always ensure there’s a slight amount of slack in the chain when adjusting.
  • Chain too loose: If the chain is too loose, it may skip over the cogs or cause excessive wear on the cassette and chainrings. Recheck the chain length and remove any extra links if necessary.
  • Improper reinstallation: If the chain is not installed correctly, it can derail or fail to shift properly. Double-check that the chain is threaded correctly through the derailleurs and that all links are secure.

Final Thoughts on Adjusting the SRAM PC-1170 Chain Length

Adjusting the length of your SRAM PC-1170 chain is a crucial step in maintaining a well-functioning and efficient drivetrain. By following the correct procedures and regularly checking your chain’s length, you can ensure that your bike performs at its best for years to come. Always remember to check the chain length when replacing components like the cassette or chainrings, as changes to these can affect the overall chain length requirement.

With these tips in mind, you’re now ready to adjust your SRAM PC-1170 chain to perfection and keep your bike running smoothly on every ride.