When replacing the cones for a front hub with new ones, is it okay to tighten the lock nut directly against the cone nut? Or must I use some kind of spacer / washer / shim in order for some other reason than spacing?
The reason I ask is that I am replacing the cones on a front hub that was correctly spaced at 100mm. The old setup has
Lock nut - Washer - Cone nut - Hub/Cups - Cone nut - Washer - Lock nut
The replacement cones I got match in the old ones in all ways except that they are slightly wider (i.e. take more space of the axle). So, instead of getting two more cones ($20 more dollars!), I figured I could just leave out the old washers and leave the setup like this, which would be spaced about 100mm:
Lock nut - New Cone nut - Hub/Cups - New Cone nut - Lock nut
So, would this be alright? Does the original washer play any other role than just making the spacing correct?