You'll always need inner tubes for your road bike, mountain bike, city bike or trekking bike. Either as a spare to bring along on your rides, or to replace that inner tube which has been patched one too many times. Road cyclists and mountain bikers normally just replace their inner tube whenever they suffer a puncture. Most cyclists on city bikes however will choose to patch their inner tube instead. Whatever the reason might be for needing a new inner tube, we've got them in all shapes and sizes, and for any kind of bike.