The right time to change to winter tires is when the ambient temperature reaches 7 degrees Celsius or below. All-season tires turn hard and lose their elasticity when temperatures are below 7 degrees Celsius. This causes reduced traction, resulting in longer stopping distances as well as reduced handling and cornering capability. Winter tires will help reduce braking distances on cold, wet, ice and snow covered roads. The braking distance of a winter tire compared to an all-season tire, depending on speed and road conditions can be up to 25% shorter, or two vehicle lengths. Winter tires contain silica, which is a compound that keeps the tire flexible in cold temperatures and ensures excellent grip and braking on wet roads. Silica maintains its properties in low temperatures, which help to maintain a firm grip on snow and ice packed roads. Please click on your respected BMW model to view our current specials. If for some reason we do not have what you are looking for, please feel free to give us a call at (866) 980-5287 and we will gladly help you out.