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Continue to ChatSprocket - Rear, 428 Chain, 40 Tooth - 20A1190 - PBC3227F1 - https://giovanni-bikes.com/express-parts-catalog/sprockets/sprocket-rear-428-chain-40-tooth-20a1190-pbc3227f1
Sprocket - Rear, 428 Chain, 40 Tooth - 20A1190 - PBC3227F1 - https://giovanni-bikes.com/express-parts-catalog/sprockets/sprocket-rear-428-chain-40-tooth-20a1190-pbc3227f1