Extender length (hole to hole): 8-1/2". Shank size: 2". Extender receiver size: 2" (fits for 2" shank hitch mount bike racks or cargo carriers. And use the anti-rattle hitch tightener to tighten this part when you assemble to hitch receiver.are space between your bumper beam and your hitch mount bike rack or cargo carrier. ).
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