Shimano Altus FC-M311 Square Taper Chainset 48/38/28T 175mm

Entry level 7/8-speed chainset offering slick hyperdrive shifting performance for off road enthusi...

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eBayNEW Shimano Altus FC-M311 Square Taper 48/38/28T 170mm Chainset with Chainguard
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TredzShimano Black Fc-M311 Altus Square Taper Chainset
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OnBuy.comShimano (48/38/28T - 170 Mm, Black) Altus Fc-M311 Altus Square Taper Chainset With Chainguard
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Condor CyclesShimano Black Altus M311 Chainset
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Product Information

Full details

This guide is for cyclists looking to upgrade their 7/8-speed bike's chainset with the Shimano Altus FC-M311. It offers smooth shifting and reliable performance, ideal for off-road enthusiasts. Note that this chainset is designed for use with a 123 mm square taper bottom bracket, ensuring proper fit and function.

All features

Model Part NumberEFCM311E888CL
BrandSHIMANO

Extended Product Information

FAQs

What tools are needed for installation?

You will need a crank puller, a bottom bracket tool, a torque wrench, and possibly a chain tool for adjusting chain length.

What type of bottom bracket is required?

The Shimano Altus FC-M311 is designed for use with a 123 mm square taper bottom bracket.

How often should I lubricate the chain?

Lubricate the chain every 100-200 miles, or more often in wet or dirty conditions.

How do I clean the chainrings?

Use a degreaser and a brush to remove dirt and grime from the chainrings. Rinse with water and dry thoroughly before lubricating the chain.

What if the crank arm bolts come loose?

Tighten the crank arm bolts to the manufacturer's specified torque. If they continue to loosen, consider replacing the bolts.

What is the lifespan of the chainrings?

The lifespan of the chainrings depends on usage and maintenance. Replace the chainrings when the teeth are worn or damaged, which can affect shifting performance.

Troubleshooting

Shifting is not smooth or precise.

Check and adjust the front derailleur, ensure the chain is properly lubricated, and inspect the chainrings for wear. Also, ensure the chain is compatible with the chainset.

Chain is skipping or not engaging properly.

Check chain wear and replace if necessary. Adjust the front derailleur. Also, check for any bent chainring teeth.

Crank arms are loose.

Tighten the crank bolts to the manufacturer's specified torque using a torque wrench.

Pros and Cons

Pros

  • Smooth and reliable shifting performance.
  • Durable construction with steel chainrings.
  • Versatile gearing options with a triple chainring setup.
  • Compatible with a wide range of 7/8-speed bikes.
  • Easy installation with a square taper bottom bracket interface.

Cons

  • Requires a compatible square taper bottom bracket (123 mm).
  • May not be suitable for high-end or professional use.
  • The chainrings are made of steel, which is heavier than some other materials.

Setup, Compatibility & Care

  1. Compatibility: Ensure your bike uses a 123 mm square taper bottom bracket. Verify that your current bottom bracket is compatible.
  2. Installation: Follow the manufacturer's instructions for installing the chainset. Use appropriate tools for tightening the crank bolts to the recommended torque.
  3. Chain Length: Adjust the chain length to ensure proper shifting across all gears. A chain that is too short will strain the drivetrain, and one that is too long will cause poor shifting.
  4. Maintenance: Regularly clean and lubricate the chain to maintain smooth shifting. Inspect the chainrings for wear and replace them if necessary.
  5. Torque: Use a torque wrench to tighten bolts to the manufacturer's specifications to avoid damage.

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