Shimano Ultegra SM BBR60 Bottom Bracket. Shimano has lightened up their Ultegra Bottom Bracket with the SM BBR60. Lighten up with the an Ultegra BBR60 Bottom bracket. This BB features a proprietary seal system which reduces friction by 50% letting you spin faster and more consistently.
|Bike Nashbar||$12.99 on sale||$20.99|
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