Quote Originally Posted by hound53
McMaster-Carr has steel balls, just measured my spare and it was .122 through the plastic bag so 1/8 th would give you about .005 difference
This is a nit-pick but 1/8" = 0.0125" so it would be 0.003" bigger than the 0.122" ball. Also, any bicycle shop will have 1/8" bearing balls and may give you one at no cost.