Loose Ball Bearings - Grade 25 Chromium Steel - 1/8'' (3,175 Mm) (100 Pcs)

BK-5039 - 1/8 (0.125) Grade 10 Steel Balls - 100 pieces - Loose ball bike parts are still out there, so Enduro carries the loose balls you need to complete the job. Grade 10 balls meet or exceed 10/1,000,000 tolerance of sphericity and is considered extremely round. Only a few years ago, Grade 25 would be considered a very high grade ball, used only in the best hubs and bottom brackets. Today, Enduro's entry-level ABEC-3 bearings feature Grade 10 balls and then Grade 5 or Grade 5 as you go up in price and performance.