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 studs for Vauxhall/Opel: 10mm, 19mm, 25mm wide spacers.
Grayston Wheel Spacer Kit 10mm 3/8'' UNF Mini/Metro/MG/Midget/Sprite/A35/A40
Grayston Wheel Spacer Kit 10mm M12x1.5 Ford Escort MK2 Capri
Grayston Wheel Spacer Kit 19mm 7/16 UNF Ford Escort MK1 Cortina MK1 & 2 Anglia
20MM 4X114.3 73MM HUBCENTRIC WHEEL SPACER KIT UK MADE MGB GT
20MM 5x120.65 73.9MM HUBCENTRIC WHEEL SPACER KIT UK MADE JAGUAR XJ COUPE XK8
Hubcentric 15mm Wheel Spacer Kit, Pair - 4x108 PCD, 65.1mm CB