Why does the tread on the tires of your bike wear down over time?

The tread on bike tires wears down over time due to a combination of factors, including friction with the road surface, regular use, and environmental conditions. As the tires make contact with various terrains, the rubber gradually erodes, diminishing the tread depth that provides grip and stability. Additionally, factors like tire pressure and riding style can influence the rate of wear. Regular maintenance and timely replacement of worn tires are essential for safety and performance.