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Continue to ChatSprocket - Front, 17 Tooth, 428 Chain, 17mm Hole - 20A1630F1 - https://electricbikeusa.net/express-parts-catalog/sprockets/sprocket-front-17-tooth-428-chain-17mm-hole-20a1630f1
Sprocket - Front, 17 Tooth, 428 Chain, 17mm Hole - 20A1630F1 - https://electricbikeusa.net/express-parts-catalog/sprockets/sprocket-front-17-tooth-428-chain-17mm-hole-20a1630f1