TKR5541B ? Spindles (6x13x5mm outer bearing, left/right, SCT410.3/EB48SL)This is an updated version of TKR5541. ?It features a larger outer bearing recess for use with TKRBB06135 bearings. ?The bearings increase durability in all conditions. ?These are also compatible with the original SCT410. ?The stock 10x15x4mm inner bearings are used.Note: ?TKR5541 has been discontinued.