1 x 1.5" Lower Bearing (TH073) for an FSA Orbit (No.57) Headset

ACB518K, MR110, MR127, TH-073E MR110, ACB518K, TK518B

 

ZS56 BOTTOM HEADSET BEARING

This is a not an FSA bearing, but from quality supplier, Minhon, precision milled steel cups and premium Mobil grease used. Thee are an affordable but high quality replacement for FSA bearings 

ID - 40mm

OD - 52mm

H - 8mm

ANGLE -  36˚ / 45˚

You will also need an upper bearing which is PO3K / TH873E / MR122 . We sell these on their own too, and also an FSA Orbit No.57 kit with both bearings. See our listings.