15" dia., 4mm (.157) thick, 205 series bearing with 3/4" I.D. For Great Plains planters built prior to 1999; early model drills built prior to 1999 with heavy duty 15 series openers.
15" dia., 4mm (.157) thick, 205 series bearing with 5/8" I.D. For Great Plains planters built 1999 & after; late model drills built 1999 & after with heavy duty HD00, HD10, 15, 25 series openers.
16" dia., .196" thick, 5/8" wide, 2-1/8" center pilot hole. 5 hole pattern with 4.75" bolt circle. For John Deere MaxEmerge®2, Plus, Pro, XP, XP Pro, ME5, ME5e, EE planters; 1530, 1535 drills.
For adapting GD4157 nylon press wheels to Great Plains drills. Order (2) when replacing wheels with steel halves; Spacer washer for Case-IH gauge wheel arms. Order (1) for each arm.
For Martin spading-closing wheels with two single row bearings, SH80172 Martin fCrusher wheel; John Deeere planter ME2, Plus, Pro; early XP, XP Pro; drill early 750 cast iron closing wheel.
For Ausherman, Great Plains no-till, fertilizer coulter attachments; Great Plains planter, drill frame mounted single-arm no-till and fertilizer coulter; Brillion Compaction Commander, early Zone Commander®, inline rippers 4-bolt fluted coulter.