Suntour xce groupset5/21/2023 The tops of the teeth were not squared flat or grooved, as with older designs, but were asymmetrical, with a slant inward. Sun Tour freewheels provided much better shifting than older designs due to the superior design of the sprocket teeth. In the early '70s, Sun Tour freewheels were a revolutionary development, markedly superior to their European competition (Atom, Cyclo, Everest, Regina etc.)
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