Generally it is the crank model that determines spindle length, so check what spindle length the crank manufacturer recommends or measure your old BB. If between sizes, it´s usually wise to choose the longer.Features:- Sealed, cartridge bearings for simplicity and longevity- Classic square taper design- JIS taper - works with most cranks- Hollow, boron steel axle- Aluminum cups- Spindles are available in a variety of lengths to fit most cranksets- Includes crank boltsSpecifications:- Weight: 258g - Length: 110mm