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gbj_tester
Depends on manufacturer I guess.
Most pinned rims probably do. A Mavic Ellipse I taco'd had an insert inside the (welded) join, so I'd assume all their other rims are the same. HPS Archetypes and TB14s always seem to have a bit of radial runout at the join (not the case with SL42s), so maybe they don't have an insert. Need an X-ray machine.