Several responses to questions about this product indicated that it is suitable for 16" bikes. I have tried them on two different 16" Trek bikes that had the correct mounting points. The calipers didn't extend all the way to the rim making them unusable. I'm sure they will fit 20" wheels easily but if you have a 16" wheel buy them not. They won't fit. Note that the build quality appears solid. They feel solid and fit 20" wheels well.
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