Alloy 1 thick rear pulley rotor spacer has 5 holes and 7/16 bolt holes. This spacer is ideal to get belt pulleys and chain sprockets in line. Spacer can be machined down to the next size under without having to worry about the spigot alignment when you machine the face of the spacer down to desired thickness. Spacers are drilled for use with 7/16 bolts and designed to be used with 2000-UP type wheel hubs.
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