Will measure today, thanks. If the 108 would indeed be spot on, that means my chainline is off 2.5mm.
Other than chainring/cog/chain wear would there be anything else to worry about? I've been running the same phil wheels, zen chainring and phil cog for about 2 years. Obviously the chainring/cog have some wear but seems about normal for the amount of riding I'm doing. Someone told me to watch out for extra play in the hubs? Not really sure how to notice that..