Removing a crankset is a relatively simple task that can be completed with a few basic tools. However, it is important to take your time and follow the steps carefully to avoid damaging your bike. Even if you’re not mechanically inclined, with a little patience and care, you can remove your crankset at home. Cranks, chainrings, and bottom brackets make up your drivetrain. The crankset is the part that allows you to actually move your bike so it’s important to keep it in good working order. Cleaning and replacing your crankset will help extend the life of your bicycle and keep you riding smoothly.
First, you will need to gather the following tools: a 5mm Allen key, a 14mm socket wrench, a chain whip, and a crank puller. Once you have your tools, you can begin the process of removing the crankset. It’s a good idea to lay down a towel or tarp beneath your bike before you begin to catch any falling parts. Start by shifting your bike into the smallest chainring. Then, use the 5mm Allen key to loosen the pinch bolts on the crank arms. Once the pinch bolts are loose, you can use the 14mm socket wrench to remove the crank arm bolts. Finally, use the chain whip to remove the chainring bolts. Once the chainring bolts are removed, you can pull the crankset off of the bottom bracket spindle.
If you are having difficulty removing the crankset, you can try using a penetrating oil to loosen the bolts. However, be sure to wipe away any excess oil before you reassemble the crankset. Once the crankset is removed, you can clean and inspect the parts. If any of the parts are damaged, you will need to replace them before you reassemble the crankset. To reassemble the crankset, simply follow the steps in reverse order. Be sure to tighten all of the bolts to the proper torque specifications. Once the crankset is reassembled, you can test it by riding your bike. If the crankset is working properly, you should be able to shift gears smoothly and pedal without any problems.
Gathering Essential Tools and Equipment
Essential Tools
* Allen key set: Various sizes are typically required for different crankset designs.
* Chain whip: Prevents the chain and cassette from rotating during crankset removal.
* Crank puller: A specialized tool designed to extract the crankset from the bottom bracket.
* Pedal wrench: Used to remove the pedals before crankset removal.
Additional Equipment
* Work stand or bike stand: Provides a stable platform for working on the bike.
* Rubber mallet (optional): Can be used to gently tap the crank puller arms and aid in crankset extraction.
* Degreaser or cleaning solution: Required to remove any dirt or grease prior to tool use.
* Shop rags or paper towels: For cleaning and wiping.
Recommended Sizes
The recommended sizes for Allen keys and crank pullers depend on the specific crankset design. However, common sizes include:
| Tool | Sizes |
|---|---|
| Allen keys | 4mm, 5mm, 6mm, 8mm |
| Crank pullers | Adjustable or specific to crankset model |
It is important to have the correct tools for your specific crankset. Refer to the manufacturer’s instructions or consult with a bike mechanic if unsure.
Removing the Pedals
For the third step, you will need to remove the pedals. This is relatively simple, but there are a few things to keep in mind.
- First, you will need to identify the type of pedals you have. There are two main types of pedals: platform pedals and clipless pedals. Platform pedals are the most common type of pedal and are simply a flat surface that you rest your foot on. Clipless pedals, on the other hand, require you to wear special shoes that clip into the pedals.
- Once you have identified the type of pedals you have, you can begin removing them. To remove platform pedals, simply use a 15mm wrench to loosen the bolts that hold the pedals in place. To remove clipless pedals, you will need to use a special tool called a pedal wrench.
- Finally, once the pedals are loose, you can simply pull them off the crank arms. Be careful not to drop the pedals, as they can be heavy.
Detaching the Chain
To detach the chain, use a chainbreaker tool. If you don’t have a chainbreaker tool, you can use a pair of pliers but be careful not to damage the chain or the pliers. To detach the chain using a chainbreaker tool, follow these steps:
1. Position the chainbreaker tool over the chain pin that you want to remove.
2. Tighten the chainbreaker tool until the pin breaks.
3. Remove the broken pin and the chain will now be detached.If you are using a pair of pliers to detach the chain, follow these steps:
1. Position the pliers over the chain pin that you want to remove.
2. Squeeze the pliers until the pin breaks.
3. Remove the broken pin and the chain will now be detached.
4.Removing the Crankset with a Crank Puller
To remove the crankset with a crank puller, follow these steps:
Step Description 1 Attach the crank puller to the crank arm. 2 Tighten the crank puller until the crank arm comes loose. 3 Remove the crank arm and the crankset will now be detached. Removing the Chainring Bolts
The chainring bolts are what hold the chainrings in place on the crankset. Before you can remove the crankset, you need to remove these bolts. To do this, you will need a 5mm Allen key or Torx key. Insert the key into the bolt and turn it counterclockwise to loosen it. Once the bolt is loose, you can remove it by hand. Repeat this process for all of the chainring bolts.
Bolt Size Tool Required 5mm Allen key or Torx key Tips
- If the chainring bolts are particularly tight, you may need to use a breaker bar or impact wrench to loosen them.
- Be careful not to strip the bolts. If you do, you will need to replace them.
- Once the chainring bolts are removed, you can now remove the chainrings and crankset.
Using a Crank Puller
A crank puller is a specialized tool designed to remove the crankset from the bottom bracket. It consists of a threaded bolt, a puller arm, and a cup that fits over the crank arm. To use a crank puller, follow these steps:
- Remove the pedals from the crank arms.
- Unscrew the chainring bolts and remove the chainrings.
- Thread the bolt of the crank puller into the crank arm until it is snug.
- Attach the puller arm to the bolt and tighten it.
- Place the cup of the crank puller over the crank arm.
- Tighten the puller arm until the crankset pops off the bottom bracket.
Note: Some cranksets require a specific type of crank puller. Consult your bike’s manual or the manufacturer’s website to determine the correct tool for your model.
Safety Tips:
- Always wear safety glasses when working on your bike.
- Use a torque wrench to tighten the crank puller to prevent stripping the threads.
- Be careful not to damage the crank arms or the bottom bracket when using the crank puller.
Separating the Crankarms from the Bottom Bracket
7. Removing the Crankarms
Once the crank bolts have been loosened, you can proceed with removing the crankarms. Here’s how:
- Position a crank puller on the crankarm. The puller should be securely attached to the arm, with the threaded shaft aligned perpendicular to the crankarm’s axle.
- Tighten the puller’s threaded shaft by hand until it makes contact with the bottom bracket spindle. Do not overtighten at this stage.
- Using a wrench, gently turn the puller’s shaft clockwise, applying slow and steady pressure. As you turn, observe the crankarm for any movement.
- If the crankarm does not start moving within a few turns, slightly loosen the puller and re-tighten it, ensuring it is correctly aligned. Repeat step 3.
- Once the crankarm begins to move, continue turning the shaft clockwise until the arm is completely removed from the bottom bracket.
- Repeat steps 1-5 for the opposite crankarm.
Note: It’s crucial to apply pressure evenly and carefully during this process to avoid damaging the crankarm or bottom bracket.
Tip: If you encounter significant resistance while removing the crankarms, use a penetrating oil to lubricate the threads and ease the process.
Can’t Remove Crankarms?
In some cases, crankarms may be seized or stuck due to corrosion or overtightening. If you are unable to remove them using the crank puller method:
- Apply penetrating oil to the crankarm threads and let it sit for several hours.
- Try tapping the crankarm with a rubber mallet or using a pry bar to break the bond.
- If all else fails, seek professional assistance from a bicycle mechanic.
Inspecting the Bottom Bracket and Crankarms
Inspecting the Bottom Bracket
Before attempting to remove the crankset, it’s crucial to inspect the bottom bracket and crankarms for any damage or abnormalities. This will help you identify potential issues that may require further attention before proceeding with the removal process.
Inspect the bottom bracket for any signs of wear, corrosion, or damage to the bearings, seals, or axle. If there are any visible issues, it’s recommended to replace the bottom bracket before removing the crankset.
Inspecting the Crankarms
Examine the crankarms for any cracks, dents, or other damage. If there are any significant defects, removing the crankset is not advisable until the crankarms are repaired or replaced.
Check the crankarm bolts for tightness and ensure they are not stripped or damaged. If the bolts are loose or damaged, it’s essential to tighten them or replace them as needed.
Re-Assembling the Crankset
Step 1: Align the Crankset and Axle
Align the crankset with the axle so that the splines on the axle engage with those on the crankset. Make sure the crank arms are facing the correct direction, typically with the chainrings facing outward.
Step 2: Tighten the Cranks
Use the crank bolts or cap screws to tighten the crankset onto the axle. Apply an appropriate amount of torque, as specified by the manufacturer’s instructions. If overtightened, the cranks may become damaged.
Step 3: Install the Chainrings
If the chainrings are not already installed, mount them onto the crankset using the provided bolts. Ensure they are aligned correctly and tighten them securely.
Step 4: Check Alignment and Tension
Check that the crankset is aligned properly and there is no play or excessive movement. Adjust the chain tension by moving the rear derailleur if necessary.
Step 5: Inspect and Lubricate
Inspect the crankset for any damage or wear. Lubricate the bearings and any moving parts to ensure smooth operation.
Step 6: Install the Pedal Arms
Screw the pedal arms into the crank arms, making sure to tighten them securely. Use a pedal wrench or hex key to apply the correct torque, typically around 35-45 Nm.
Step 7: Install Chain Guard or Covers
If there is a chain guard or cover, install it onto the crankset to protect the chain and prevent dirt from accumulating.
Step 8: Saddle and Test Ride
Reinstall the saddle and take the bike for a test ride to ensure the crankset is functioning properly. Listen for any unusual noises or vibrations and adjust as necessary.
Step 9: Final Inspection and Adjustments
After the test ride, thoroughly inspect the crankset and all its components. Check the chainring alignment, crankset tightness, and pedal bearings. Make any final adjustments or tightenings if required.
Tightening the Crankarms and Chainring Bolts
Once you have removed the crankset, you will need to tighten the crankarms and chainring bolts. This is a critical step, as it ensures that the crankset is properly secured and able to function correctly. Here are the steps on how to tighten the crankarms and chainring bolts:
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Apply a small amount of thread locker to the threads of the crankarms and chainring bolts. This will help to keep the bolts from loosening over time.
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Insert the crankarms into the bottom bracket and tighten the crankarms using a socket wrench. The torque specifications for tightening the crankarms will vary depending on the type of crankset you have. Refer to the manufacturer’s instructions for the specific torque specifications.
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Once the crankarms are tightened, install the chainrings and tighten the chainring bolts using a socket wrench. Again, the torque specifications for tightening the chainring bolts will vary depending on the type of crankset you have. Refer to the manufacturer’s instructions for the specific torque specifications.
Table of Recommended Torque Specifications for Common Crankset Types
Crankset Type Crankarms Torque (Nm) Chainring Bolts Torque (Nm) Shimano Hollowtech II 35-50 10-12 SRAM GXP 40-55 10-12 Race Face Cinch 44-60 10-12 How to Remove Crankset
A crankset is a set of two cranks that connect the pedals to the bike’s bottom bracket. Removing a crankset is necessary for a variety of reasons, such as replacing the cranks, bottom bracket, or chainrings. This guide will show you how to remove a crankset using the proper tools and techniques.
- Gather your tools. You will need a crank puller, a chain whip, a 5mm Allen wrench, and a 14mm socket wrench.
- Remove the pedals. Use a 15mm socket wrench to loosen the pedals and remove them.
- Remove the chainring bolts. Use a 5mm Allen wrench to loosen the chainring bolts and remove the chainrings.
- Attach the crank puller. Thread the crank puller onto the crank arm and tighten it until it is snug.
- Turn the crank puller. Use a 14mm socket wrench to turn the crank puller bolt clockwise. This will pull the crankset off of the bottom bracket.
- Remove the crankset. Once the crankset is loose, you can remove it by hand.
People Also Ask
How do I remove a crankset without a crank puller?
If you do not have a crank puller, you can use a hammer and a punch to remove the crankset. Place the punch on the back of the crank arm and hit it with the hammer. This will drive the crankset off of the bottom bracket.
How do I know if I need to remove my crankset?
There are a few signs that you may need to remove your crankset. These include:
- The cranks are loose or wobbly.
- The chainrings are worn or damaged.
- The bottom bracket is making noise.
