Originally Posted by
davidad
Never Used them and have had no problems.
There are rims without reinforcing around the nipple holes that will crack without the washers, guaranteed, especially some older rims fro the '70s. Mavic Open Sports are probably marginal. I build them from myself without but I am 150 pounds and generally kind to wheels. Velocity Aeros have lots of material there and can go no washer without issue.
Ben