Run sram cranks in your 386evo frame shims are based on industry standard 386evo bottom bracket shells 386evo is a 22 mm wider version of pressfit 30 using the same cups straight 46 mm bore and 30 mm spindle diameter but in an 865 mm wide shell easy to install and machined for exact fit shims press fit directly into 386evo bearings 6806 30 mm id bearings you will need the 386evo bearings already installed into the 386evo shell to start this conversion removal is the opposite of installation