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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?

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Having washers between the two nuts is probably more the exception than the rule. – Daniel R Hicks Jul 11 '13 at 3:29
up vote 4 down vote accepted

I've just rebuilt a totally stock Shimano wheel set and it had locknuts touching cones all over the place. Go for it.

share|improve this answer
Can I assume you mean that the stock wheel had no washers before the rebuild? – PositiveK Jul 11 '13 at 23:51
That is exactly what I meant. – alex Jul 12 '13 at 2:31

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