I have 392 miles on my f7 and 300 of them are here in Iowa. We have been riding the river from Dunkerton to Independance The Ice is all chipped up from all the sleds on it so you get good lubrication have not had a problem with it getting hot yet. Finally got a couple more inches of snow today but was already home when it started. So for anyone that lives close to waterloo Ia it is well worth the drive to get some miles on. I have only seen 5 fircats around here mine and a couple buddies sleds. If you are going to ride the river I sugest that you put on aleast 8" carbides I run 10s and is allmost to much on glare Ice. if you have any other Q's you can e-mail me.