{"product_id":"12-tooth-428-pit-bike-front-sprocket-17mm","title":"12 Tooth 428 Pit Bike Front Sprocket (17mm)","description":"This is a new item. 12 tooth for use with 428 chain. 17mm centre spline. SIZE NOTES:  Centre Spline can be 17mm or 20mm depending on engine. MOST are 17mm but please check before ordering. Sprocket tooth size guide: 420 chain - Width between inner plates is 6.35mm, roller diameter 7.77mm 428 chain - Width between inner plates is 7.94mm, roller diameter 8.51mm","brand":"Red Circles","offers":[{"title":"Default Title","offer_id":56137014083924,"sku":"PB780.1","price":5.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/4463\/0100\/files\/c51fad1de2f48b368bbc24f22ce60d56.png?v=1781648449","url":"https:\/\/amr-pitbikes.co.uk\/products\/12-tooth-428-pit-bike-front-sprocket-17mm","provider":"AMR Moto","version":"1.0","type":"link"}