Sprocket for Detachable Chain, 9 Teeth w/ 5.125″ OD & 1/2″ Bore Fits 45 or 55 Chain Our eBay Store About Us Contact Us Add to Favorite Sellers Sprocket for Detachable Chain 45 & 55 – 9 Teeth w/ 5.125″ OD & 3/4″ Bore 41.95