Small flywheel 12 13 14 15 (indicate the number of teeth) Chain 110 sections plus rear 520 type chain 120 sections plus rear 520 type large sprocket 38 teeth (pursuit of speed) large sprocket 43 teeth large sprocket 45 teeth large sprocket 47 teeth large sprocket 50 teeth (pursuit of power) SIF + chain + large sprocket 38T (force small speed fast) Sxiaofei + chain + large sprocket 43T Safy + chain + large sprocket 45T Sific + chain + large sprocket 47T Sific + chain + large sprocket 50T (force is slow)
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Items weight estimation 0 g, subject to actual weight
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