3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD
3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD

3932-21 Front Wheel Hub Inner Dirt Guard. 1921-1928 Harley JD

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These are the Inner dirt guards (1 pair) that fit over the front wheel hub.

These fit Harley J F JD FD JDH Models from 1921 to 1928.

The I.D. where these fit over the hub is about 1.97"

They should be tapped on to the hub for a snug fit. Make sure you get them all the way on the hub! so they don't interfere with the outer dust guard.   You'll have to use a driving tool or piece of pipe to do this.