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Ritchey Stem Shim Adapter - 31.8 to 28.6 mm 1-1/4" to 1-1/8"
Ritchey Stem Shim Adapter - 31.8 to 28.6 mm 1-1/4" to 1-1/8". The Stem Shim Adapter helps to accommodate different diameter steerer tube and stem clamp combinations.