Do all normal threaded track hubs and cogs have the same chainline?
No. There is a rough standard of 42mm but due to variations in hubs and cogs you will find chainline with threaded track hubs and cogs can vary from 40mm to 46mm or more. The best information is on Sheldon’s site, if you scroll down a little to the chart; ‘Fixed Sprockets and Single Freewheels’ and look at the ‘Chainline Center to Shoulder’ on the hub chart you can see that the distance to the hub shoulder (against which the cog mounts) for common hubs varies from around 35mm (Suzue) to nearly 40mm (Goldtec). The similar chart shows the chainline for cogs varies from 5mm to 7mm. To find the actual chainline you add together the two measurements for the combination you are using. Thus a Goldtec hub with a 1/8″ EAI cog would have a chainline of over 46mm. A Miche track hub with a 1/8″ Campag cog would have a chainline of around 43.3mm. Taking a VeloSolo threaded cog it has an overall width of 7.5mm with the shoulder on the inside. The tooth thickness (on a 1/8″ cog) is 3.0mm. Thus the ce
