Home Products agricultural chain weld on sprockets sprockets x series 55 and 550 chain 55 and 550 chain Use with X series hubs only. 6 Available Products SALE 5507X - Weld-On Sprocket 7 tooth, for 55 or 550 chain. 4.250" O.D., 2.000" I.D. ... SALE 5508X - Weld-On Sprocket 8 tooth, for 55 or 550 chain. 4.750" O.D., 2.000" I.D. ... SALE 5509X - Weld-On Sprocket 9 tooth, for 55 or 550 chain. 5.250" O.D., 2.000" I.D. ... SALE 5510X - Weld-On Sprocket 10 tooth, for 55 or 550 chain. 5.750" O.D., 2.000" I.D. ... SALE 5511X - Weld-On Sprocket 11 tooth, for 55 or 550 chain. 6.250" O.D., 2.000" I.D. ... SALE 5512X - Weld-On Sprocket 12 tooth, for 55 or 550 chain. 6.750" O.D., 2.000" I.D. ... 6 Available Products