Without physically inspecting the rear derailleur of the mountain bike, it is difficult to definitively determine if it is bent. However, common signs of a bent rear derailleur include difficulty shifting gears smoothly, unusual noises while pedaling, or the chain rubbing against the derailleur. If any of these symptoms are present, it is advisable to have a professional bike mechanic inspect the derailleur to determine if it is bent and in need of adjustment or replacement. **

Without physically inspecting the rear derailleur, it is difficult to determine if it is bent. However, common signs of a bent rear derailleur include difficulty shifting gears, unusual noise while pedaling, and the chain rubbing against the derailleur. If any of these symptoms are present, it is advisable to have the rear derailleur inspected by a professional bike mechanic to determine if it is indeed bent and in need of adjustment or replacement. **

The rear wheel of your mountain bike may be wobbling due to a few possible reasons. It could be that the wheel is not properly seated in the dropouts, the axle nuts or quick release skewer may not be tightened correctly, or the wheel may be out of true, meaning it is not perfectly round. Additionally, the spokes may be loose or damaged, causing the wheel to wobble. It is important to address this issue promptly to ensure safe and efficient riding. **

Yes, it is possible to add rear suspension to a mountain bike afterwards. However, it may require some modifications to the frame and components of the bike. You will need to consult with a professional bike mechanic or a bike shop to determine if your specific bike is compatible with rear suspension and what modifications would be necessary. Keep in mind that adding rear suspension may also affect the overall performance and handling of the bike, so it's important to consider the potential impact on your riding experience. **

To tighten the rear wheel of a mountain bike, start by flipping the bike over and resting it on the handlebars and saddle. Then, use a wrench to loosen the nuts or quick release lever on the rear wheel axle. Once the wheel is loose, center it in the frame and make sure the chain is properly seated on the rear cassette. Finally, tighten the nuts or close the quick release lever, making sure the wheel is secure and centered before flipping the bike back over. **

If the rear wheel is not centered between the rear stays, it can cause issues with the bike's handling and performance. A misaligned rear wheel can lead to uneven wear on the tires and affect the bike's stability while riding. It is important to ensure that the rear wheel is properly aligned and centered to prevent any potential problems while cycling. **

There is no definitive answer to whether it is safer to sit in the rear right or rear left of a car as safety can depend on various factors. However, statistically, the rear right seat is considered slightly safer in some countries due to the direction of traffic flow. It is important to always wear a seatbelt and ensure that all passengers are properly restrained, regardless of where they are seated in the car. **

The rear left door may not be able to be opened due to a mechanical issue such as a faulty door latch or handle. It could also be due to a safety feature such as child safety locks being engaged. Additionally, if the vehicle is equipped with a central locking system, there may be an issue with the locking mechanism preventing the door from being opened. It is important to have the issue diagnosed and repaired by a qualified mechanic to ensure the safety and functionality of the door. **