Cycling on busy roads can be made a lot safe with a good bike mirror, saving you the need to constantly look over your shoulder to check what's coming up behind. Although they are a more common accessory for commuters and tourers, don't dismiss them for your training rides. A mirror will allow you to keep track of approaching traffic, so you are able to complete interval sets more easily. You can keep your focus on the road ahead and the data displayed on your cycling computer, whilst staying tucking in to an optimal riding position. There are a variety of mirrors on the market today - they no longer have to be bulky, unsightly devices - they can be tiny, neat and slick. Read the full article on Cycling Weekly here.