Even if your bike was in tip-top shape before you set off, you can of course be unlucky en route. But with a little skill and experience you will typically be able to continue after an emergency repair on the road. At least until the next bike repair shop. With good, puncture-free tires, the risk of a flat tire is negligible. Some bike riders report several thousand kilometers without a single puncture. But some are not so lucky. It is a good idea to practice patching and/or changing hoses if you are planning a bike ride lasting several days. If it’s just a day trip and you’re not too far from home or a bus or train station, you’ll probably manage anyway. Bring plastic strips and some gaffer tape for emergency repairs on the bike or equipment, e.g. bags.