If you're on a long bike trip, and suddenly your bike breaks down, what will you do? If you don't carry a bike tool kit with you, you may end up pushing it back home or to the nearest repair shop. Bike tools are cheap and affordable for bike riders on any budget. They are just a small investment, but they can save you hours of trouble in case you have a biking emergency. The best bike tools are small and can be kept under your saddle for when you need them. No one wants trouble, but it's good to be prepared when it happens.