Spare battery, charger, bike helmet, day bike backpack (approx. 20 liters) with rain cover, comfortable sports shoes, possibly cycling shoes, weather-appropriate and durable clothing in a multi-layer principle, possibly cycling jersey, possibly cycling gloves, pump, bike tools, sun and rain protection, provisions and drinking water, drinking bottle and suitable holder, first aid kit, pocket knife, mobile phone, possibly mobile phone holder for the handlebar, possibly headlamp and reflectors, map material