One New Aftermarket Replacement John Deere Tachometer that fits Tractor models: 1030, 1130, 1630, 1830, 2030, 2130 -- All with 8 Speed Transmission. 19 MPH.OD is 4 1/8", Dash hole size should be around 3 7/8".Replaces Part Number: AL30803Please confirm fitment before buying.