18" Diameter Reverse Lip / Rolled Flange Inner Halves:
Assembly Hole Pattern / Hole Sizing for M8 Bolts: 40 XØ8.5mm Equally Spaced.
1 Hole Slotted For Thru Center Valve.
Rim I.D. @ Bolt Flange: N/A / Bore: 15.900" / Bolt Circle: 16.580"
Bolt Flange Thickness: 0.180" +0.010/-0"