Have been feeling like I keep my chain a little bit on the tight side so I decided to leave a little more slack in it today. At the end of my 33 mile ride (RIght at the end!) I was on a downhill and was putting resistance on the pedals as I was going downhill getting ready for my turn off of the main road. Dropped my chain to the inside of the cog on the rear wheel.. broke 2 spokes and came to a wonderfully long skid stop! DAMN! How tight is too tight? I will go back to keeping it snug though.