To remove a bicycle crank without a crank puller, you can try using a rubber mallet to gently tap the back of the crank arm to loosen it from the spindle. You can also try using a piece of wood and a hammer to tap the back of the crank arm. Another method is to use a long bolt or rod that fits into the spindle and tap it with a hammer to push the crank arm off the spindle. However, it's important to be cautious and gentle when using these methods to avoid damaging the crank arm or the bike. **

To determine which bicycle crank you need, you should consider the type of bike you have (road, mountain, hybrid, etc.), the number of gears on your bike, and the type of riding you do (casual, racing, off-road, etc.). You will also need to know the specific measurements of your current crank, such as the length of the crank arms and the type of bottom bracket. It's important to ensure that the new crank you choose is compatible with your bike's drivetrain and bottom bracket. If you're unsure, it's best to consult with a bike mechanic or specialist to help you find the right crank for your bike. **

To remove the bicycle crank, you will need a crank puller tool. Start by removing the dust cap from the crank arm and then loosen the fixing bolt using an appropriate wrench. Next, attach the crank puller tool to the crank arm and turn it clockwise to remove the crank arm from the bottom bracket spindle. Repeat the process for the other side if necessary. **

To remove an old bicycle crank, you will need a crank puller tool. First, remove the dust cap from the crank arm using a screwdriver. Then, use the crank puller tool to thread into the crank arm and push against the spindle to remove the crank arm from the bike. Once the crank arm is removed, you can then proceed to clean and inspect the bottom bracket and install a new crank if needed. **

I would recommend looking for a crank that is compatible with the specific model and size of the bicycle. It's important to consider the type of riding you will be doing (e.g. road, mountain, commuting) and your personal preferences for gear ratios. Additionally, consulting with a bike mechanic or visiting a local bike shop can help ensure that you find a suitable crank for your bicycle. **

To remove the crank from a bicycle, you will need a crank puller tool. First, remove the dust cap from the crank arm and then unscrew the bolt holding the crank arm in place. Next, attach the crank puller tool to the crank arm and use a wrench to turn the tool, which will push the crank arm off the bottom bracket spindle. Once the crank arm is removed, repeat the process for the other side if necessary. **

MTB bicycle cranks or bearings can crack or pop if they are under excessive stress or if they have been damaged. This can happen due to over-tightening the crank bolts, hitting the crank on rocks or other obstacles while riding, or general wear and tear over time. It is important to regularly inspect your cranks and bearings for any signs of damage or unusual noises, and to address any issues promptly to prevent further damage or potential safety hazards while riding. **

If the tool does not fit to remove the bicycle crank, it could be due to a few reasons. The tool may be the wrong size or type for the specific crank you are trying to remove. It's also possible that the crank is damaged or corroded, making it difficult for the tool to grip and turn it. In this case, it may be necessary to use a different tool or seek professional assistance to remove the crank without causing further damage. **