Schwinn Worlds are good value bikes. Even early models had lugged frames, cotterless cranks, & chrome steel wheels. Sometime in the 80's they came equipped with alloy wheels & better components. The reason they're unappreciated is due to the numbers produced. Kind of like Toyota Camry. A good value but pretty ho-hum to collectors. I've owned & ridden several. They're very nice bikes. Easy to repair & maintain. And, one of the most durable bikes ever made.