Originally Posted by
rustymongrel
I measured mine with my mic. NDS bearing surface was 0.5894" and DS was 0.5891"... so 14.95~14.97mm
When the axle is slipped through the bearings there is noticeable play. Once the DS locknut is tightened the play is eliminated. On my wheel the DS locknut tightens against a spacer which slips over the axle and pushes against the bearings inner race.
I posted a detailed account here once on how to use Miche Primato hub hardware on a 900. The Primato uses a 10mm threaded solid axle with "cones" and lock nuts for 15mm ID sealed bearings. It allows you to set the preload and lock the nuts against the cone; doing away with the centre sleeve. It's probably less rigid than the stock track axle.
I have a lathe and may be able to make a replacement if you don't mind a long lead time.
Thank you so much Rusty! Yeah, it looks like I lost some clearance there. Just as a comparison, I disassembled my Mavic iO and Corima four spoke to compare the amount of play in each. The Mavic is a slight interference fit, so zero play, and while the Corima was not, there was little to no radial play even with the locknuts removed.
That's very interesting about the Miche Primato axle. This is plug and play, no spacers need to be made to center the rim? I've been looking at hub/axle designs and the Mavic Comete also lacks a center sleeve, so it can't be that bad! Alternatively I may look into shims to get the center sleeve usable, or have a local replacement made out of steel.
Thanks so much for the help, that is massively useful to me!