Where studs are supplied, these are to replace the original studs, not to convert bolt applications. 3/8" UNF studs to suit (old) Minis etc: 10mm, 19mm or 25mm wide spacers. 12 x 1.5mm bolts for (old) VW Beetle (5 hole): 25mm wide spacers.
Grayston Wheel Spacer Kit 19mm 3/8'' UNF Mini/Metro/MG/Midget/Sprite/A35/A40
Grayston Wheel Spacer Replacement Extension Studs For Austin Mini / Metro 32mm
7MM & 15MM BLACK WHEEL SPACER KIT - PORSCHE 911 (996 997 991) Boxster Cayman
Wheel Spacer Kit 32mm Mini Universal 3 8 Inch UNF Extension Studs 3/8"
Mini Wheel Spacer Kit (Classic) 10mm with 50mm extended Studs
20MM 4X114.3 73MM HUBCENTRIC WHEEL SPACER KIT UK MADE MGB GT
