{"product_id":"13-tooth-420-pit-bike-front-sprocket-20mm","title":"13 Tooth 420 Pit Bike Front Sprocket (20mm)","description":"This is a new item. 13 tooth for use with 420 chain. 20mm 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":56137031418196,"sku":"PB790.1","price":5.79,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0801\/4463\/0100\/files\/0469da53e702265faff73a3d2ee07b4b.png?v=1781648898","url":"https:\/\/amr-pitbikes.co.uk\/products\/13-tooth-420-pit-bike-front-sprocket-20mm","provider":"AMR Moto","version":"1.0","type":"link"}