Speed ratios are 1, 25 speed ratios are 1, 4 speed ratios are 1, 6 speed ratios are 1, 8 speed ratios are 2, 24 speed ratios are 2, 5 speed ratios are 2, 8 speed ratios are 3, 15 speed ratios are 3
tooth surface hardness:
Hard tooth surface
layout form:
coaxial
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Items weight estimation 0 g, subject to actual weight
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