Awwe Crap!

[JSeery]

The gaskets come in a verity of sizes so you can get the stack down to within a few thousands. Speedways set has the following sizes included in their axle gasket kit:

•(2) - White gasket thickness - .003"
•(2) - Ivory gasket thickness - .005"
•(2) - Green gasket thickness - .007"
•(2) - Blue gasket thickness - .009"

VanPelt sells a BEST Gasket set, looks like it has the same size ranges.

Total of both sides determines bearing preload and the difference between them determines backlash. Everyone I know sets them by "feel" as to both preload and backlash.