Mountain biking can be a tough sport on your body, especially your knees. Knee pads can help protect your knees from scrapes and bruises and also provide some warmth on colder days. Whether or not you should wear knee pads while mountain biking is really up to personal preference. Some people find them uncomfortable or constricting, while others appreciate the extra protection they offer. Ultimately, it’s up to you to decide whether or not you want to wear knee pads while mountain biking.