Run sram cranks in your bbright frame shims are based on industry standard bbright bottom bracket shells easy to install and machined for exact fit shims press fit directly into bbright bearings you will need the bbright bearings already installed into the bbright shell to start this conversion removal is the opposite of installation adaptors are not compatible with direct fit bb such as r5ca but are compatible with 201112 cervelo r3 r5 and r5vwd