"The Sport-Roller Core as a single bag is an excellent choice for city cyclists looking for a cost-effective entry into biking without compromising on quality or sustainability. Whether on the front or rear luggage carrier, this practical bicycle bag effortlessly transports everything you need in the city. A trip to the countryside, a visit to the gym, or a small shopping spree, are all easily possible in any weather, as the minimalist bag is 100% waterproof.