SWISCO - The Replacement Hardware Authority

84-062 or 84062m, Which is sturdier?

A home owner from USA says:
Hi, Was looking at part # 84-062. Wondered if the support material of part # 84-062M might be a little sturdier. Or is the BB wheel the only difference.
Thank you.
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Tom from SWISCO responded:
Hey, Jerry. Metal wheels are usually stronger than nylon wheels, yes. Keep in mind, though, that the metal wheel of the 84-062M will not hold up as well in a salt-air environment.
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