Widens 61mm wide Specialized Carbon OSBB frame BB shells for use with Pressfit 30 bottom brackets. Place one 3.5mm BB cup spacer between each bottom bracket cup and the frame when installing the bottom bracket. Additional crank spindle spacers included to fine-tune any crankset fitment play.
Machined engineering-grade Delrin.
If the bearing cups are already in the frame, remove them by tapping out from the inside with a large wooden dowel or flat-ended punch. Be careful to push on the bearing cups and not the bearings themselves. Once the cups are removed, simply install a 3.5mm spacer on each side between the bottom bracket cups and bottom bracket shell, then press the cups into the BB and install the cranks.
In some cases, it might be necessary to use one or more of the included Wheels Mfg. CRANK-SPC spacers to adjust the chainline.
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