Special bearing used on some Trek and Gary Fisher frames. It's a 6900 bearing with a flanged outer race and an extended inner race. Trek bearing number is W283643

DIMENSIONS:

FLANGE OD: 24mm
OUTER RACE OD: 22mm
OUTER RACE WIDTH: 6mm
INNER RACE ID: 10mm
INNER RACE WIDTH: 8mm

INNER CONSRUCTION... Deep Groove Radial Full Complement ("MAX")
BALL MATERIAL .... Chromium Steel
BALL GRADE ....... 10
RACES ...... Chromium Steel
APPLICATION ...... Suspension Pivots
GREASE .....High pressure marine