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Converts 73mm wide bottom brackets to 100mm wide bottom brackets. Seals between BB cups to protect spindle and bearings.
Use with any RWC brand outboard bottom bracket for 100mm FAT BIKE applications. Also compatible with SRAM GXP cups, FSA Mega EXO cups, and Shimano HT2 cups.
100% made in USA anodized aluminum.
100mm BB shell width only.
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