What are the different mountain bike stem sizes available and how do I choose the right one for my bike?

Mountain bike stems come in various sizes, typically ranging from 40mm to 120mm in length. To choose the right stem size for your bike, consider your riding style and preferences. A shorter stem provides quicker handling and is ideal for technical trails, while a longer stem offers more stability and is better for cross-country riding. Experimenting with different stem lengths can help you find the best fit for your bike and riding style.