Joined: Oct 2016
Posts: 854
Likes: 334
From: Cambridge UK
Bikes: 1903 24 spd Sunbeam, 1927 Humber, 3 1930 Raleighs, 2 1940s Sunbeams, 2 1940s Raleighs, Rudge, 1950s Robin Hood, 1958 Claud Butler, 2 1973 Colnago Supers, Eddie Merckx, 2 1980 Holdsworth, EG Bates funny TT bike, another 6 or so 1990s bikes
Chaincase
The chaincase has a flat much heavier metal insert to act as the chainstay on the drive side. The chaincase itself is made of tin and as such any repair (if using metal) must be soldered. I use fiber glass and patch the whole length from the outside. Because the soft tin originals are always dinged after you paint it black you can't see the repair. Soldering old oil-drenched tin is almost impossible to make driip proof and durable. Fiber glass is much easier and better all round.
The oil bath keeps the chains /bearing spotless.I have a 1903 Sunbeam with the original bolted together chain.
Some folks have rideable Sunbeams that are 30 years older than my oldest. I have six.
Last edited by Johno59; 10-10-23 at 12:31 AM.