Mountain bike brakes may squeak due to several reasons such as glazing of the brake pads, contamination on the brake rotor, worn-out brake pads, loose brake calipers, or misaligned brake pads. Additionally, environmental factors such as water, mud, and dust can also contribute to brake noise. Squeaking brakes not only affect the cyclist’s experience but also indicate a potential safety issue. Therefore, it is essential to diagnose and fix the cause of the squeaking as soon as possible.

To replace the front cassette on a mountain bike, you’ll need to remove the old cassette first. To do this, use a chain whip and cassette lockring tool to remove the lockring and then slide the old cassette off the freehub body. Then, install the new cassette onto the freehub body and tighten the lockring with the tool. Make sure to shift through all gears to ensure proper alignment and functionality.

To replace the pedals on a mountain bike, begin by removing the old pedals with a pedal wrench or hex key. Then, clean the threads on the crank arms with a cloth to remove any dirt or debris. Apply a small amount of grease to the threads of the new pedals and carefully screw them into place, using your hands to tighten them as much as possible. Finally, use the pedal wrench or hex key to tighten the pedals completely, being careful not to overtighten and damage the threads.

Yes, a 24 inch mountain bike can be suitable for some adults, particularly those who are shorter in height or have a smaller frame. However, it ultimately depends on the individual’s height and preferences. It’s best to test ride different sizes to find the most suitable fit for you.