Swiss Bearings Knee They always have 2 mounting

They always have 2 mounting bolts (15mm apart) on the outside of the skate

There are 8 bearings in one set

Used under your pants

One set = 2 frames + bolts

After almost a year of testing by our team

Swiss Bearings Knee They always have 2 mountingLegendary Original Bones Swiss Bearings are the optimum combination of Bones Skate Rated design and Swiss precision manufacturing creating the standard by which all other bearings are measured. For more than 24 years preferred by the worlds top professional skaters. Proven, professional competition grade speed and durability make Bones Swiss normally last several times as long as ordinary ABEC rated bearings. Single, removable, non contact rubber