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Everyone has a different idea of protection offered and protection needed and where it crosses the line with regards to comfort/price/weight/air flow/ and believe it — looks. IMO the more protection the better. I own several Lids as most do however the more experienced I become the more I find myself in places or at speeds that would require more...

2014 surly instigator. As fun as it gets.

It's as variable as the rider and his or her skill level, style, body type, discipline etc isn't it? I'm not sure a sweet spot can be established that applies to everyone. Every bike will need some adjustment after purchase in order to dial it in. IMO short CS don't suck they just aren't for everyone.