These adapters are available for 24mm spindle Shimano, or SRAM/Truvativ cranks. They help eliminate the guess work by accommodating Shimano 24mm and SRAM/Truvativ 24/22mm cranks to virtually any BB30 bottom bracket bearings. Simply insert the adapters into the existing bearings then install your crankset as usual.
Please note: the SRAM version of these adapters is not compatible with Cannondale BB30A frames.
These are the perfect light weight solution to convert your BB30 frame to accept shimano cracks. I have a Stumpy EVO that I wanted to run 165mm cranks and these made it possible to install the XT cranks.