I want to fit a Fog City Hyper Optik insert to my Tour X and I will have to order it from the UK as there aren't any here. There appear to be two sizes, universal and Arai which appears self explanatory but I seem to recall someone posting that the Tour X needs the universal.
So guys, which do I need?
All help gratefully received. 
So guys, which do I need?
All help gratefully received. 
