I have 8 solid polyurethane 4”dia x1 3/16” thick wheels with a 1 9/16” bore. The urethane wheel actually has a 2” ID with a metal hub in it. A 1 1/2”OD x 1/2” thick bearing is pressure fit into the hub and secured with steel locking rings. The bearing has a 43/64”ID(very close to 11/16”), smooth as glass to roll. Never used and in new condition, $15 each or $95 for all of them, includes postage and insurance in continental US, money order or check, sorry I don't use PayPal.