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葡萄牙的MIRANDA自行车配件厂在2005欧洲国际自行车展上首次推出了两款采用轻质材料打造的成套链轮曲柄组件。“ALFA1”和“ALFA3”这两款曲柄件均选用铝合金材料,采用冷锻工艺精制而成, 不仅外观漂亮,而且表面也相当光洁。“ALFA1”是专供那些带有内变速或美国SRAM DUAL DRIVE多级变
MIRANDA Bicycle Parts Factory in Portugal introduced two sets of sprocket crankset made of lightweight materials at the 2005 European Bicycle Show. Both ALFA1 and ALFA3 crankcase parts are made of aluminum alloy and are made from cold forging technology. They not only look beautiful but also have a smooth surface. “ALFA1” is designed for those with internal variable speed or the United States SRAM DUAL DRIVE multi-level change