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125 year old rear wheel. The cog was worn to points.
After several weeks of soaking the axle, cog and spoke nipples in penetrant I started to take it apart. The cog and lock ring took two people to get it off, one to hold it while the hub was clamped in a vice and the other to remove the lock ring and cog.
A modern track cog from the 1950s and lock ring are too small to thread on.
I had an antique skip tooth cog in my junk stash that fit. It needs a spacer on the underside of the cog.
The wood was extreemly dirty with paint, tire glue, oil and yeas of dust. I washed it with Simple Green, 99% isopropyl, acetone, xylene and paint remover, scrubbing with fine steel wool. What a gummy mess. It’s very dirty.
Sanding was required after chemical cleaning. It’s half sanded.
Oxalic acid was used as a wood bleach to brighten it up. I may not stain it, just put on a oil and varnish coat after the acid is neutralized.

After several weeks of soaking the axle, cog and spoke nipples in penetrant I started to take it apart. The cog and lock ring took two people to get it off, one to hold it while the hub was clamped in a vice and the other to remove the lock ring and cog.

A modern track cog from the 1950s and lock ring are too small to thread on.

I had an antique skip tooth cog in my junk stash that fit. It needs a spacer on the underside of the cog.

The wood was extreemly dirty with paint, tire glue, oil and yeas of dust. I washed it with Simple Green, 99% isopropyl, acetone, xylene and paint remover, scrubbing with fine steel wool. What a gummy mess. It’s very dirty.

Sanding was required after chemical cleaning. It’s half sanded.

Oxalic acid was used as a wood bleach to brighten it up. I may not stain it, just put on a oil and varnish coat after the acid is neutralized.

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