Preload suspension on a mountain bike is the initial compression force applied to the suspension spring before the rider’s weight is added. It allows the rider to adjust the initial stiffness of their suspension, making it more or less responsive to their riding style and terrain. Preload is adjusted using a dial or knob on the suspension fork or shock, and can be used to fine-tune the suspension for optimal performance and comfort.

A small mountain bike usually has a frame size between 15 and 17 inches and is recommended for riders who are between 5’2″ to 5’7″ tall. However, frame size can vary depending on the brand and model of the bike, so it’s important to test ride and consult with a bike expert before purchasing a mountain bike.

To remove the back sprocket from a mountain bike, first, you need to remove the rear wheel of the bike. Then, use a chain whip tool to keep the sprocket from rotating while using a cassette lockring tool to unscrew the lockring that holds the sprocket in place. The sprocket should then slide off the freehub body.

Not all mountain bike tires are tubeless and require a specific set up in order to be converted into a tubeless system. The tire must have a strong, airtight casing and a specific bead design that enables it to seal itself to the rim without the need for an inner tube. Additionally, it will require a tubeless valve stem to allow air to enter and exit the tire, as well as tubeless sealant to help seal punctures on the fly. Therefore, it is important to research if a particular tire can be converted to tubeless before attempting to do so.

The size of the mountain bike you should get depends on your height, inseam length, and riding style. Generally, a larger bike is better suited for taller riders, while a smaller bike is better suited for shorter riders. It’s important to choose a bike that allows you to ride comfortably and safely, with proper fitting and positioning. Consider trying out different sizes and styles of bikes before making your purchase.