AKI WORLD 56T/170mm JIS crank/chain ring set CS-OTR-001Chainwheel: 56T Crank: 5 holes 170mm Material: Crank forged aluminum Chainring aluminum alloy BB: JIS Square (cap bolt included) BCD: 130mm Weight: 830g (set weight) 56T large diameter chainring Single chain guard (outer side) 170mm Forget crank 3 piece full set Country of origin: Taiwan Package size: 30. 4 x 24. 4 x 4. 6 cm; 920 g
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