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Old 01-26-21, 06:48 PM
Ride, Wrench, Swap, Race
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Bikes: Cheltenham-Pederson racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.

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It'll be up to the OP to determine how much spacer thickness should be added to each side, respecting the chainline and also the brake arm lining up with the chainstay.

As far as thread engagement, these being fine threads, I would expect that a reliable torque could be arrived at on the nuts with as little as six threads, but more is better and the threads should always be kept well-lubed.

The spacers should be captured by a locknut on each side of the hub, and the drive-side locknut should be serrated or toothed to prevent slippage.

I would definitely never clamp down that much on the original dropout spacing, which would put undue stress on the stays leading to likely misalignment as one side always yields first.
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