When you buy these bearings from Swerve Drive Specialties, you know you are getting the same quality bearings that FRC team 2910 used on their swerve modules during the 2018, 2019, and 2020 seasons. These bearings have survived 100+ drops from level 2 of the hab in 2019 without a failure.
ID: 3.5"
OD: 4"
Width: 0.25"